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Intel Pentium 4 641

1. Eaa Land Name mana Poter Direction Sue Land Name Weg Cie Direction AG12 VCC Power Other AH23 VSS Power Other AG13 VSS Power Other AH24 VSS Power Other AG14 VCC Power Other AH25 VCC Power Other AG15 VCC Power Other AH26 VCC Power Other AG16 vss Power Other AH27 VCC Power Other AG17 VSS Power Other AH28 VCC Power Other AG18 VCC Power Other AH29 VCC Power Other AG19 VCC Power Other AH30 VCC Power Other AG20 VSS Power Other AJ1 BPM1 Common Clock Input Output AG21 VCG Power Other AJ2 BPM0 Common Clock Input Output AG22 VCC Power Other AJ3 ITP_CLK1 TAP Input AG23 VSS Power Other AJ4 VSS Power Other AG24 VSS Power Other AJ5 A34 Source Synch Input Output AG25 VCC Power Other AJ6 A35 Source Synch Input Output AG26 VCC Power Other AJ7 VSS Power Other AG27 VCC Power Other AJ8 VCC Power Other AG28 VCC Power Other AJ9 VCC Power Other AG29 VCC Power Other AJ10 VSS Power Other AG30 VCC Power Other AJ11 VCC Power Other AH1 VSS Power Other AJ12 VCC Power Other AH2 RESERVED AJ13 VSS Power Other AH3 VSS Power Other AJ14 VCC Power Other AH4 A32 Source Synch Input Output AJ15 VCC Power Other AH5 A33 Source Synch Input Output AJ16 VSS Power Other AH6 VSS Power Other AJ17 VSS Power Other AH7 VSS Power Other AJ18 VCC Power Other AH8 VCC Power Other AJ19 VCC Power Other AH9 VCC Power Other AJ20 VSS Power Other AH10 VSS Power Other AJ21 VCC Power
2. SE Land Name dis Direction wie Land Name Weg Cie Direction W3 TESTHI1 Power Other Input AA27 VSS Power Other W4 VSS Power Other AA28 VSS Power Other W5 A16 Source Synch Input Output AA29 VSS Power Other W6 A18 Source Synch Input Output AA30 VSS Power Other W7 VSS Power Other AB1 VSS Power Other ws VCG Power Other AB2 IERR Asynch GTL Output W23 VCG Power Other AB3 MCERR Common Clock Input Output W24 VCC Power Other AB4 A26 Source Synch Input Output W25 VCC Power Other AB5 A24 Source Synch Input Output W26 VCC Power Other AB6 A17 Source Synch Input Output W27 VCC Power Other AB7 VSS Power Other W28 VCC Power Other AB8 VCC Power Other W29 VCC Power Other AB23 VSS Power Other W30 VCC Power Other AB24 VSS Power Other Y1 BOOTSELECT Power Other Input AB25 VSS Power Other Y2 VSS Power Other AB26 VSS Power Other Y3 RESERVED AB27 VSS Power Other Y4 A20 Source Synch Input Output AB28 VSS Power Other Y5 VSS Power Other AB29 VSS Power Other Y6 A19 Source Synch Input Output AB30 VSS Power Other Y7 VSS Power Other AC1 TMS TAP Input Y8 VCC Power Other AC2 DBR Power Other Output Y23 VCC Power Other AC3 VSS Power Other Y24 VCC Power Other AC4 RESERVED Y25 VCC Power Other AC5 A25 Source Synch Input Output Y26 VCC Power Other AC6 VSS Power Other Y27 VCC Power Other AC7 VSS Power Other Y28 VCC Power Other AC8 VCC Power Other Yeo VCC Power Other AC23 VCC Power
3. oO y pe NO 28306 SHT 2 REV 2 a ale o ola 5 cols 2 sois Q Ela ep gl E og HE Es 23 323 ES e S ca os a zy as E z SN il KL 000000000000000000000000000 6000 00000000000000000 0000000000000000 SCH c 1 000000000 000000000 000000000 000000000 000000000 000000000 000000000 000000000 000000000 000000000 3 000000000 000000000 000000000 000000000 E 000000000 000000000 _ 000000000 000000000 000000000 o 000000000 000000000 000000000 Es 000000000000000000000000000000000 se le lo IS lo IS 0000000000000000000000000000000 en estlesiogilziousi2z Gal 33 25 23 32 2352 TS leelo le IS jes E ee bae 3 Jajaja E ES a o amp CO lt Datasheet 35 Package Mechanical Specifications Figure 3 4 Processor Package Drawing 3 a oO 1 DWG NO c28306 T il 2 En e P 5 OL sois ds 990000000 000000 lz 000000000 S 000000000 CE 000000000 000000000 Els 000000 000000000 FE ail ER le o 3 d sii H F 88 O g E 23 000000000 s s 23 i 000000000 Bes 000000000 600600000 EN 000000000 A 000000000 Bes 00000000 geen AAA a 000000000 265 0000000000000000 R
4. Land Name i ai Direction e Land Name Weg Cie Direction AM27 VSS Power Other AN16 VSS Power Other AM28 VSS Power Other AN17 VSS Power Other AM29 VCC Power Other AN18 VCC Power Other AM30 VCC Power Other AN19 VCC Power Other AN1 vss Power Other AN20 VSS Power Other AN2 VSS Power Other AN21 VCC Power Other AN3 VCC_SENSE Power Other Output AN22 VCC Power Other AN4 VSS_SENSE Power Other Output AN23 VSS Power Other AN5 REE OMRON Power Other Output ANE VSS PowernOther AN25 VCC Power Other ANS REGULATION PowerOther Output AN26 vcc Power Other AN7 FC16 Power Other Output AN27 VSS Power Other AN8 VCC Power Other AN28 VSS Power Other AN9 VCC Power Other AN29 VCC Power Other AN10 VSS Power Other AN30 VCC Power Other AN11 VCC Power Other AN12 VCC Power Other AN13 VSS Power Other AN14 VCC Power Other AN15 VCC Power Other 63 Land Listing and Signal Descriptions 4 2 64 Alphabetical Signals Reference Table 4 3 Signal Description Sheet 1 of 9 Name Type Description A 35 3 A20M Input Output Input A 35 3 Address define a 2 6_byte physical memory address space In sub phase 1 of the address phase these signals transmit the address of a transaction In sub phase 2 these signals transmit transaction type information These signals must connect the appropriate pins lands of all agents on the processor FSB A 35 3 are protected by parity signals AP 1 0 A 35 3 are source
5. op Land Name RAN Direction wie Land Name Weg Cie Direction J13 VCC Power Other L8 VCC Power Other J14 VCC Power Other L23 VSS Power Other J15 VCC Power Other L24 VSS Power Other J16 DPO Common Clock Input Output L25 VSS Power Other J17 DP3 Common Clock Input Output L26 VSS Power Other J18 VCC Power Other L27 vss Power Other J19 VCC Power Other L28 VSS Power Other J20 VCC Power Other L29 VSS Power Other J21 VCC Power Other L30 VSS Power Other J22 VCC Power Other M1 VSS Power Other J23 VCC Power Other M2 THERMTRIP Asynch GTL Output J24 VCC Power Other M3 STPCLK Asynch GTL Input J25 VCC Power Other M4 A7 Source Synch Input Output J26 VCC Power Other M5 A5 Source Synch Input Output J27 VCC Power Other M6 REQ2 Source Synch Input Output J28 VCC Power Other M7 VSS Power Other J29 VCC Power Other M8 VCC Power Other J30 VCC Power Other M23 VCC Power Other K1 LINTO Asynch GTL Input M24 VCC Power Other K2 VSS Power Other M25 VCC Power Other K3 A20M Asynch GTL Input M26 VCC Power Other K4 REQO Source Synch Input Output M27 VCC Power Other K5 VSS Power Other M28 VCC Power Other K6 REQ3 Source Synch Input Output M29 VCC Power Other K7 VSS Power Other M30 VCC Power Other K8 VCG Power Other N1 PWRGOOD Power Other Input K23 VCG Power Other N2 IGNNE Asynch GTL Input K24 VCC Power Other N3 VSS Power Other K25 VCC Power Other N4 RESERVED K26 VCC Power Other N5 RESERVED K27 VCC Power Other N6 VSS Powe
6. 69 Intel Table 4 3 Signal Description Sheet 1 of 9 Name Type Description PROCHOT Input Output As an output PROCHOT Processor Hot will go active when the processor temperature monitoring sensor detects that the processor has reached its maximum safe operating temperature This indicates that the processor Thermal Control Circuit TCC has been activated if enabled As an input assertion of PROCHOT by the system will activate the TCC if enabled The TCC will remain active until the system de asserts PROCHOT See Section 5 2 4 for more details PWRGOOD Input PWRGOOD Power Good is a processor input The processor requires this signal to be a clean indication that the clocks and power supplies are stable and within their specifications Clean implies that the signal will remain low capable of sinking leakage current without glitches from the time that the power supplies are turned on until they come within specification The signal must then transition monotonically to a high state PWRGOOD can be driven inactive at any time but clocks and power must again be stable before a subsequent rising edge of PWRGOOD The PWRGOOD signal must be supplied to the processor it is used to protect internal circuits against voltage sequencing issues It should be driven high throughout boundary scan operation REQ 4 0 Input Output REQ 4 0 Request Command must connect the appropriate pi
7. Dese Ds9 vss Deog D578 vss D55 D53 A wt vt vrt wt wr vm vss veca D62 vss Rsvp pe1 vss pse DSTBN3 vss 30 29 28 27 26 25 24 2 22 21 20 19 18 17 16 15 42 Datasheet In Figure 4 2 Landout Diagram Top View Right Side Land Listing and Signal Descriptions 14 13 12 11 10 9 8 7 6 5 4 3 2 1 vss_mB_ vcc_mB_ vss_ vo vcc vss vcc vcc ves vcc vo y rete lee uno aeoo anl SENSE ees vss VSS VCC VSS VCC VCC VSS VCC VCC FC12 VTTPWRGD FC11 VSS VID2 VIDO VSS VCC VSS VCC VCC VSS VCC VCC VSS VID3 VID1 VID5 VSS PROCHOT THERMDA VCC VSS VCC VCC VSS VCC VCC VSS RSVD VSS VID4 ITP_CLKO vss THERMDC VCC VSS VCC VCC VSS VCC VCC VSS A35 A34 VSS ITP_CLK1 BPMO BPM1 vec vss vcc vcc vss vec vcc vss VSS A334 A32 VSS RSVD vss vec vss vec vcc vss vec voc vss A29 A31 A30 BPM5 BPM3 TRST vec vss vec vcc vss vec vec vss VSS A27 A28 vss BPM4 TDO vec vss vec vec vss vcc skrocc vss RSVD vss Rsvp RSVD vss TCK VCC VSS A22 ADSTB1 VSS BINIT BPM2 TDI VCC vss vss A25 RSVD vss DBR TMS VCC VSS A17 A24 A26 MCERR IERR VSS VTT_OUT_ VCC VSS VSS A23 A21 VSS LL_ID1 RIGHT BOOT vcc vss A19 VSS A20 RSVD VSS e VCC vss A18 A16 VSS TESTHI1 TESTHI12 MSIDO VCC VSS
8. Intel Pentium 4 Processor Supporting Hyper Threading Technology Datasheet 3 80F GHz 3 60F GHz 3 40F GHz 3 20F GHz on 90 nm Process in 775 land LGA Package and supporting Intel Extended Memory 64 Technology for single processor servers and workstations Document Number 303128 004 Contents I n P INFORMATION IN THIS DOCUMENT IS PROVIDED IN CONNECTION WITH INTEL PRODUCTS NO LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TO ANY INTELLECTUAL PROPERTY RIGHTS IS GRANTED BY THIS DOCUMENT EXCEPT AS PROVIDED IN INTEL S TERMS AND CONDITIONS OF SALE FOR SUCH PRODUCTS INTEL ASSUMES NO LIABILITY WHATSOEVER AND INTEL DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY RELATING TO SALE AND OR USE OF INTEL PRODUCTS INCLUDING LIABILITY OR WARRANTIES RELATING TO FITNESS FOR A PARTICULAR PURPOSE MERCHANTABILITY OR INFRINGEMENT OF ANY PATENT COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT INTEL PRODUCTS ARE NOT INTENDED FOR USE IN MEDICAL LIFE SAVING OR LIFE SUSTAINING APPLICATIONS Intel may make changes to specifications and product descriptions at any time without notice Designers must not rely on the absence or characteristics of any features or instructions marked reserved or undefined Intel reserves these for future definition and shall have no responsibility whatsoever for conflicts or incompatibilities arising from future changes to them The Intel Pentium 4 processor in the 775 land package on 90 nm process may cont
9. ONYUSIOL GHY SNOISNINI O 031419348 ISIAYJHLO 2 2 0 620 280 HO o 200 110 0 900 Md a o ep0 21SV8 60 970 oisva LI I 189 DISV vr LI Th 899 2199 696 9 1L 1 DISVE 89 r 9 l 3ISV8 6 EE 28306 901 180 269 690 II IIAW IRC 091 160 DEN Ed ee 160 180 Ed ee l DWG NO a o 60 I EPE I see 1 lve BCE u o 6 0 1 p I see 11 lve 6 E 8L l SS LE sy Le 8Lv 11 rly l SS LE Sh LE SININHO9 XVN NIW S3HONI SYILINI TIIK CID AJIA HOLLOG 3 3 o 00 02 0 Z 00 S0 0 Z7 011 SHI 1 02 31V28 g 11v130 n NOI 1235 list 31Y95 V K EN 31V81Sg0S JOVAIWd 1NV1V3S SHI 800 02 0 7 00 800 Z AJIA LNOYY V MAIA dOL Datasheet 34 a ntel E Package Mechanical Specifications Figure 3 3 Processor Package Drawing 2
10. options See Section 6 1 for details Table 2 4 Signal Characteristics Signals with RB Signals with no R A 35 3 ADS ADSTB 1 0 AP 1 0 BINITH BNR BOOTSELECT BPRI D 63 0 DBI 3 0 DBSY DEFER DP 3 0 DRDY DSTBN 3 0 DSTBP 3 0 HIT HITM LOCK MCERR PROCHOT REQ 4 0 RS 2 0 RSP TRDY A20M BCLK 1 0 BPM 5 0 BRO BSEL 2 0 COMP 5 0 FERR PBE IERR IGNNE INIT LINTO INTR LINT1 NMI PWRGOOD RESET SKTOCC SMI STPCLK TDO TESTHI 13 0 THERMDA THERMDC THERMTRIP VID 5 0 VTTPWRGD GTLREF TCK TDI TRST TMS Open Drain Signals BSEL 2 0 VID 5 0 THERMTRIP FERR PBE IERR BPM 5 0 BRO TDO VTT_SEL LL ID 1 0 MSID 1 0 NOTES 1 The BOOTSELECT signal has a 500 5000 pull up to Ver rather than on die termination 2 Signals that do not have R nor are actively driven to their high voltage level Table 2 5 Signal Reference Voltages GTLREF Ve BPMI 5 0 LINTO INTR LINT1 NMI RESET BINIT BNR HIT HITM MCERR PROCHOT BRO A 35 0 ADS ADSTB 1 0 AP 1 0 BPRI D 63 0 DBI 3 0 DBSY DEFER DP 3 0 DRDY DSTBN 3 0 DSTBP 3 0 LOCK REQ 4 0 RS 2 0 RSP TRDY NOTES BOOTSELECT VTTPWRGD A20M IGNNE INIT PWRGOOD SMI STPCLK TCK TDI TMS TRST 1 These signals also have hysteresis added to the reference voltage See Table 2 13 for more infor
11. Power Other VSS AJ24 Power Other VSS AM27 Power Other VSS AJ27 Power Other VSS AM28 Power Other VSS AJ28 Power Other VSS AM4 Power Other VSS AJ29 Power Other VSS AN1 Power Other VSS AJ30 Power Other VSS AN10 Power Other VSS AJ4 Power Other VSS AN13 Power Other VSS AJ7 Power Other VSS AN16 Power Other VSS AK10 Power Other VSS AN17 Power Other VSS AK13 Power Other VSS AN2 Power Other VSS AK16 Power Other VSS AN20 Power Other VSS AK17 Power Other VSS AN23 Power Other VSS AK2 Power Other VSS AN24 Power Other VSS AK20 Power Other VSS AN27 Power Other VSS AK23 Power Other VSS AN28 Power Other VSS AK24 Power Other VSS B1 Power Other VSS AK27 Power Other VSS B11 Power Other VSS AK28 Power Other VSS B14 Power Other VSS AK29 Power Other VSS B17 Power Other VSS AK30 Power Other VSS B20 Power Other VSS AK5 Power Other VSS B24 Power Other VSS AK7 Power Other VSS B5 Power Other VSS AL10 Power Other VSS B8 Power Other VSS AL13 Power Other VSS C10 Power Other VSS AL16 Power Other VSS C13 Power Other VSS AL17 Power Other VSS C16 Power Other VSS AL20 Power Other VSS C19 Power Other VSS AL23 Power Other VSS C22 Power Other VSS AL24 Power Other VSS C24 Power Other VSS AL27 Power Other VSS C4 Power Other VSS AL28 Power Other VSS C7 Power Other VSS AL3 Power Other VSS D12 Power Other VSS AL7 Power Other VSS D15 Power Other VSS AM1 Power Other VSS D18 Po
12. 33 3 1 1 Package Mechanical Drawing coomooccccnnnnccccccnonnoncccnnnnanncncnnnnnnnnccnnnnnn nc nc naar a nccnnnnnns 33 3 1 2 Processor Component Keep Out Zones nn nn ncn narran 37 3 1 3 Package Loading Specifications cccccceeccceceeeeeeeeeeeceeeeeseeeeeseaeeeeaeeeseeeeesenaeessaes 37 3 1 4 Package Handling Gudelmes nn nac nnnn rra 37 3 1 5 Package Insertion Specifications ssseessseeeseeesneeneesinssrrnssrnstnnnnnnnrennnnnnennnne 38 3 1 6 Processor Mass Gpecflcation cc cnnrnnnnnn cnn 38 3 1 7 Processor Materials oooomoccccnnnnmccccnnnonecccnnnnnneccnnnnnneccnnnnnnnecnn nn nnne cnn nnnane cnn 38 3 148 Processor MarkiMgS mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm mmmmmmiucmmm 38 3 1 9 Processor Land Coordinates a 39 4 Land Listing and Signal Descriptions ra 41 4 1 Processor Land Assidhmenis cuina 41 4 2 Alphabetical Signals Reference nano rca rana 64 5 Thermal Specifications and Design Considerattons 73 5 1 Processor Thermal Specifications nara n corr canaria rraran rr nnannncn 73 5 1 1 Thermal Specifications nr 73 5 1 2 Thermal Metrology idupne ii EANA AER 77 5 2 Processor Thermal Features U u uu uuu 77 5 2 1 Thermal Monitor aid 77 Datasheet 3 Contents I ntel 3 52 2 Thermal Monitor Lian e 78 5 2 3 On De
13. 45 mA 5 lu Input Leakage Current 200 uA ho Output Leakage Current 200 yA Ron Buffer On Resistance 7 12 Q NOTES 1 Unless otherwise noted all specifications in this table apply to all processor frequencies 2 All outputs are open drain 3 Vuyg represents the amount of hysteresis nominally centered about 0 5 V r for all TAP inputs 4 The Vry referred to in these specifications refers to instantaneous Ver 5 The maximum output current is based on maximum current handling capability of the buffer and is not specified into the test load 6 Leakage to Vss with land held at Ver Table 2 14 VTTPWRGD DC Specifications Symbol Parameter Min Typ Max Unit Notes Vit Input Low Voltage 0 3 V ViH Input High Voltage 0 9 V 28 Datasheet Table 2 15 BSEL 2 0 and VID 5 0 DC Specifications Electrical Specifications Symbol Parameter Max Unit Notes 2 Ron BSEL Buffer On Resistance 60 Q Ron VID Buffer On Resistance 60 Q loL Max Land Current 8 mA lLo Output Leakage Current 200 uA 3 VTOL Voltage Tolerance Ver max V E NOTES 13 Unless otherwise noted all specifications in this table apply to all processor frequencies 2 These parameters are not tested and are based on design simulations 3 Leakage to Vgg with land held at 2 5 V Table 2 16 BOOTSELECT DC Specifications Symbol Parameter Mi
14. Datasheet Land Listing and Signal Descriptions I ntel 4 Land Listing and Signal Descriptions This chapter provides the processor land assignment and signal descriptions 4 1 Processor Land Assignments This section contains the land listings for the Pentium 4 processor in the 775 land package The landout footprint is shown in Figure 4 1 and Figure 4 2 These figures represent the landout arranged by land number and they show the physical location of each signal on the package land array top view Table 4 1 is a listing of all processor lands ordered alphabetically by land signal name Table 4 2 is also a listing of all processor lands the ordering is by land number 41 Datasheet Land Listing and Signal Descriptions g g D n Figure 4 1 Landout Diagram Top View Left Side 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 AN VCC VCC VSS VSS VCC VCC VSS VSS VCC VCC VSS VCC VCC VSS VSS VCC AM VCC VCC VSS VSS VCC VCC VSS VSS VCC VCC VSS VCC VCC VSS VSS VCC AL VCC VCC VSS VSS VCC VCC VSS VSS VCC VCC VSS VCC VCC VSS VSS VCC AK VSS VSS VSS VSS VCC VCC VSS VSS VCC VCC VSS VCC VCC vss vss VCC AJ VSS VSS VSS VSS VCC VCC VSS VSS VCC VCC VSS VCC VCC VSS VSS VCC AH VCC VCC VCC VCC VCC VCC VSS VSS VCC VCC VSS VCC VCC VSS VSS VCC AG VCC VCC VCC VCC VCC VCC VSS VSS VCC VCC VSS VCC VCC vss vss VCC AF vss vss vss vss vss vss vss vss VCC VCC vss VCC VCC VSS VSS VCC AE VSS VSS VSS VSS V
15. Figure 7 6 Baseboard Power Header Placement Relative to Processor Socket 7 3 7 3 1 Datasheet R4 33 110 di Boxed_Proc_PwrHeaderPlacement Thermal Specifications This section describes the cooling requirements of the fan heatsink solution used by the boxed processor Boxed Processor Cooling Requirements The boxed processor may be directly cooled with a fan heatsink However meeting the processor s temperature specification is also a function of the thermal design of the entire system and ultimately the responsibility of the system integrator The processor temperature specification is in Chapter 5 The boxed processor fan heatsink is able to keep the processor temperature within the specifications see Table 5 1 in chassis that provide good thermal management For the boxed processor fan heatsink to operate properly it is critical that the airflow provided to the fan heatsink is unimpeded Airflow of the fan heatsink is into the center and out of the sides of the fan heatsink Airspace is required around the fan to ensure that the airflow through the fan heatsink is not blocked Blocking the airflow to the fan heatsink reduces the cooling efficiency and decreases fan life Figure 7 7 and Figure 7 8 illustrate an acceptable airspace clearance for the fan heatsink The air temperature entering the fan should be kept below 38 C Again meeting the processor s temperature specification is the responsibility of the system
16. Input A4 P6 Source Synch Input Output BINIT AD3 Common Clock Input Output ASH M5 Source Synch Input Output BNR C2 Common Clock Input Output AG L4 Source Synch Input Output BOOTSELECT Y1 Power Other Input A7 M4 Source Synch Input Output BPMO AJ2 Common Clock Input Output A8 R4 Source Synch Input Output BPM1 AJ1 Common Clock Input Output A9H T5 Source Synch Input Output BPM2 AD2 Common Clock Input Output A10 U6 Source Synch Input Output BPM3 AG2 Common Clock Input Output All T4 Source Synch Input Output BPM4 AF2 Common Clock Input Output A12 U5 Source Synch Input Output BPM5 AG3 Common Clock Input Output A13 U4 Source Synch Input Output BPRI Ga Common Clock Input A14 V5 Source Synch Input Output BR0 F3 Common Clock Input Output A15 V4 Source Synch Input Output BSELO G29 Power Other Output A16 W5 Source Synch Input Output BSEL1 H30 Power Other Output A17 AB6 Source Synch Input Output BSEL2 G30 Power Other Output A18 W6 Source Synch Input Output COMPO A13 Power Other Input A19 Y6 Source Synch Input Output COMP1 T1 Power Other Input A20 Y4 Source Synch Input Output DO B4 Source Synch Input Output A20M K3 Asynch GTL Input D1H C5 Source Synch Input Output A21 AA4 Source Synch Input Output D2 A4 Source Synch Input Output A22 AD6 Source Synch Input Output D3 C6 Source Synch Input Output A23 AA5 Sour
17. Other AH11 VCC Power Other AJ22 VCC Power Other AH12 VCC Power Other AJ23 VSS Power Other AH13 VSS Power Other AJ24 VSS Power Other AH14 VCC Power Other AJ25 VCC Power Other AH15 VCC Power Other AJ26 VCC Power Other AH16 VSS Power Other AJ27 VSS Power Other AH17 VSS Power Other AJ28 VSS Power Other AH18 VCC Power Other AJ29 VSS Power Other AH19 VCC Power Other AJ30 VSS Power Other AH20 VSS Power Other AK1 THERMDC Power Other AH21 VCC Power Other AK2 VSS Power Other AH22 VCC Power Other AK3 ITP_CLKO TAP Input Datasheet 61 Land Listing and Signal Descriptions 62 Table 4 2 Numerical Land Assignment intel Table 4 2 Numerical Land Assignment we Land Name ee Direction W Land Name died Direction AK4 VID4 Power Other Output AL15 VCC Power Other AK5 VSS Power Other AL16 VSS Power Other AK6 RESERVED AL17 VSS Power Other AK7 VSS Power Other AL18 VCC Power Other AK8 VCC Power Other AL19 VCC Power Other AK9 VCC Power Other AL20 VSS Power Other AK10 VSS Power Other AL21 VCC Power Other AK11 VCC Power Other AL22 VCC Power Other AK12 VCC Power Other AL23 VSS Power Other AK13 VSS Power Other AL24 VSS Power Other AK14 VCC Power Other AL25 VCC Power Other AK15 VCC Power Other AL26 VCC Power Other AK16 VSS Power Other AL27 VSS Power Other AK17 V
18. Other Y30 VCC Power Other AC24 VCC Power Other AA2 LL_ID1 Power Other Output AC25 VCC Power Other AA3 VSS Power Other AC26 VCC Power Other AA4 A21 Source Synch Input Output AC27 VCC Power Other AA5 A23 Source Synch Input Output AC28 VCC Power Other AA6 VSS Power Other AC29 VCC Power Other AA7 VSS Power Other AC30 VCC Power Other AA8 VCG Power Other AD1 TDI TAP Input AA23 VSS Power Other AD2 BPM2 Common Clock Input Output AA24 VSS Power Other AD3 BINIT Common Clock Input Output AA25 VSS Power Other AD4 VSS Power Other AA26 VSS Power Other AD5 ADSTB1 Source Synch Input Output 59 Land Listing and Signal Descriptions 60 Table 4 2 Numerical Land Assignment intel Table 4 2 Numerical Land Assignment we Land Name ee Direction sany Land Name Re Dr i Direction AD6 A22 Source Synch Input Output AF1 TDO TAP Output AD7 VSS Power Other AF2 BPM4 Common Clock Input Output AD8 VCC Power Other AF4 A28 Source Synch Input Output AD23 VCG Power Other AF5 A27 Source Synch Input Output AD24 VCC Power Other AF6 VSS Power Other AD25 VCC Power Other AF7 VSS Power Other AD26 VCC Power Other AF8 VCC Power Other AD27 VCC Power Other AF9 VCC Power Other AD28 VCC Power Other AF10 VSS Power Other AD29 VCC Power Other AF 11 VCC Power Other AD30 VCC Power Other AF12 VCC Power Other AE1 TCK TA
19. Table 7 1 for the specific requirements Figure 7 9 Boxed Processor Fan Heatsink Set Points Datasheet Higher Set Point Highest Noise Level Increasing Fan Speed amp Noise Lower Set Point Lowest Noise Level X Y Z Internal Chassis Temperature Degrees C 93 Boxed Processor Specifications I n 94 Table 7 2 Fan Heatsink Power and Signal Specifications Boxed Processor Fan Heatsink Set Point C Boxed Processor Fan Speed Notes When the internal chassis temperature is below or equal to this set point X lt 30 the fan operates at its lowest speed Recommended maximum internal chassis temperature for nominal operating environment When the internal chassis temperature is at this point the fan operates Y 34 between its lowest and highest speeds Recommended maximum internal chassis temperature for worst case operating environment Z gt 38 When the internal chassis temperature is above or equal to this set point _ _ the fan operates at its highest speed NOTES 1 Set point variance is approximately 1 C from fan heatsink to fan heatsink If the boxed processor fan heatsink 4 pin connector is connected to a 4 pin motherboard header and the motherboard is designed with a fan speed controller with PWM output CONTROL see Table 7 1 and remote thermal diode measurement capability the boxed processor will operate as follows As processor power ha
20. VCC AF22 Power Other VCC AJ19 Power Other VCC AF8 Power Other VCC AJ21 Power Other VCC AF9 Power Other VCC AJ22 Power Other VCC AG11 Power Other VCC AJ25 Power Other VCC AG12 Power Other VCC AJ26 Power Other VCC AG14 Power Other VCC AJ8 Power Other VCC AG15 Power Other VCC AJ9 Power Other VCC AG18 Power Other VCC AK11 Power Other 47 Land Listing and Signal Descriptions 48 Table 4 1 Alphabetical Land Assignments Intel Table 4 1 Alphabetical Land Assignments Land Name nq oo Direction Land Name Ean ds Direction VCC AK12 Power Other VCC AN12 Power Other VCC AK14 Power Other VCC AN14 Power Other VCC AK15 Power Other VCC AN15 Power Other VCC AK18 Power Other VCC AN18 Power Other VCC AK19 Power Other VCC AN19 Power Other VCC AK21 Power Other VCC AN21 Power Other VCC AK22 Power Other VCC AN22 Power Other VCC AK25 Power Other VCC AN25 Power Other VCC AK26 Power Other VCC AN26 Power Other VCC AK8 Power Other VCC AN29 Power Other VCC AK9 Power Other VCC AN30 Power Other VCC AL11 Power Other VCC AN8 Power Other VCC AL12 Power Other VCC AN9 Power Other VCC AL14 Power Other VCC J10 Power Other VCC AL15 Power Other VCC J11 Power Other VCC AL18 Power Other VCC J12 Power Other VCC AL19 Pow
21. and Vgg lands Refer to the Voltage Regulator Down VRD 10 1 Design Guide For Desktop LGA775 Socket for socket loadline guidelines and VR implementation details Table 2 11 GTL Asynchronous Signal Group DC Specifications Symbol Parameter Min Max Unit Notes Vu Input Low Voltage 0 0 Vrr 2 0 10 Ve V 2 3 Vu Input High Voltage Vrr 2 0 10 Va Vor v 3456 Von Output High Voltage 0 90 V 7 Var v 567 lo Output Low Current We a KR A 8 lu Input Leakage Current N A 200 uA lLo Output Leakage Current N A 200 yA 10 Ron Buffer On Resistance 8 12 Q S NOTES Unless otherwise noted all specifications in this table apply to all processor freguencies 2 VI is defined as the voltage range at a receiving agent that will be interpreted as a logical low value 3 LINTO INTR and LINT1 NMI use GTLREF as a reference voltage For these two signals Vu GTLREF 0 10 V r and V GTLREF 0 10 VrTr 4 V y is defined as the voltage range at a receiving agent that will be interpreted as a logical high value 5 Vu and Voy may experience excursions above Vyr However input signal drivers must comply with the signal quality spec ifications Datasheet 27 Electrical Specifications I n 6 The Vy referred to in these specifications refers to instantaneous Vyr 7 All outputs are open drain 8 The maximum output current is based on maximum current handling capability
22. integrator 91 Boxed Processor Specifications I ntel E Figure 7 8 Boxed Processor Fan Heatsink Airspace Keepout Requirements Side View 92 Datasheet In 7 3 2 Boxed Processor Specifications Variable Speed Fan If the boxed processor fan heatsink 4 pin connector is connected to a 3 pin motherboard header it will operate as follows The boxed processor fan will operate at different speeds over a short range of internal chassis temperatures This allows the processor fan to operate at a lower speed and noise level while internal chassis temperatures are low If internal chassis temperature increases beyond a lower set point the fan speed will rise linearly with the internal temperature until the higher set point is reached At that point the fan speed is at its maximum As fan speed increases so does fan noise levels Systems should be designed to provide adequate air around the boxed processor fan heatsink that remains cooler then lower set point These set points represented in Figure 7 9 and Table 7 2 can vary by a few degrees from fan heatsink to fan heatsink The internal chassis temperature should be kept below 38 C Meeting the processor s temperature specification see Chapter 5 is the responsibility of the system integrator The motherboard must supply a constant 12 V to the processor s power header to ensure proper operation of the variable speed fan for the boxed processor Refer to
23. new instructions that further extend the capabilities of Intel processor technology These new instructions are called Streaming SIMD Extensions 3 SSE3 These new instructions enhance the performance of optimized applications for the digital home such as video image processing and media compression technology 3D graphics and other entertainment applications such as gaming will have the opportunity to take advantage of these new instructions as platforms with the Pentium 4 processor in the 775 land package and SSE3 become available in the market place The processor s Intel NetBurst microarchitecture FSB uses a split transaction deferred reply protocol like the Pentium 4 processor The Intel NetBurst microarchitecture FSB uses Source Synchronous Transfer SST of address and data to improve performance by transferring data four times per bus clock 4X data transfer rate as in AGP 4X Along with the 4X data bus the address bus can deliver addresses two times per bus clock and is referred to as a double clocked or 2X address bus Working together the 4X data bus and 2X address bus provide a data bus bandwidth of up to 6 4 GB s The Pentium 4 processor on 90 nm process in the LGA775 land Package will also include the Execute Disable Bit capability previously only available in Intel Itanium processors This feature combined with a support operating system allows memory to be marked as executable or Introduction 1 1 1 1 1 intel
24. ntel o 72 Datasheet 5 1 Note 5 1 1 Datasheet Thermal Specifications and Design Considerations Thermal Specifications and Design Considerations Processor Thermal Specifications The Pentium 4 processor in the 775 land package requires a thermal solution to maintain temperatures within operating limits as set forth in Section 5 1 1 Any attempt to operate the processor outside these operating limits may result in permanent damage to the processor and potentially other components within the system As processor technology changes thermal management becomes increasingly crucial when building computer systems Maintaining the proper thermal environment is key to reliable long term system operation A complete thermal solution includes both component and system level thermal management features Component level thermal solutions can include active or passive heatsinks attached to the processor Integrated Heat Spreader IHS Typical system level thermal solutions may consist of system fans combined with ducting and venting For more information on designing a component level thermal solution refer to the Intel Pentium 4 Processor on 90 nm Process in the 775 Land Package Thermal Design Guidelines The boxed processor will ship with a component thermal solution Refer to Chapter 7 for details on the boxed processor Thermal Specifications To allow for the optimal operation and long term reliability of Intel processor based
25. of the buffer and is not specified into the test load 9 Leakage to Vss with land held at Ver 10 Leakage to Vrr with land held at 300 mV Table 2 12 GTL Signal Group DC Specifications Symbol Parameter Min Max Unit Notes Vu Input Low Voltage 0 0 GTLREF 0 10 Mrt V 2 3 Vu Input High Voltage GTLREF 0 10 V r Vor V 3 4 Von Output High Voltage 0 90 V r Vor V 3 lo Output Low Current N A vr GC Rrr MIN A ON_MIN lu Input Leakage Current N A 200 pA 3 ho Output Leakage Current N A 200 uA Ron Buffer On Resistance 8 12 Q NOTES 1 Unless otherwise noted all specifications in this table apply to all processor frequencies 2 Vu is defined as the voltage range at a receiving agent that will be interpreted as a logical low value 3 The Vx referred to in these specifications is the instantaneous V 7 4 Vin is defined as the voltage range at a receiving agent that will be interpreted as a logical high value 5 Leakage to Vss with land held at Ver Table 2 13 PWRGOOD and TAP Signal Group DC Specifications Symbol Parameter Min Max Unit Notes 2 Vpys Input Hysteresis 200 350 mV 3 Input low to high 4 Vr rs Ges 0 5 Vtr Vuys min 0 5 Vir Vuys_ max V Input high to low 4 Vr lg voltage 0 5 Vrr Vuvs max 0 5 Vrr ViYys min V Von Output High Voltage N A Vor V 4 lo Output Low Current
26. program execution in an attempt to reduce the processor junction temperature To protect the processor its core voltage V must be removed following the assertion of THERMTRIP Driving of the THERMTRIP signal is enabled within 10 us of the assertion of PWRGOOD and is disabled on de assertion of PWRGOOD Once activated THERMTRIP remains latched until PWRGOOD is de asserted While the de assertion of the PWRGOOD signal will de assert THERMTRIP if the processor s junction temperature remains at or above the trip level THERMTRIP will again be asserted within 10 us of the assertion of PWRGOOD TMS Input TMS Test Mode Select is a JTAG specification support signal used by debug tools TRDY Input TRDY Target Ready is asserted by the target to indicate that it is ready to receive a write or implicit writeback data transfer TRDY must connect the appropriate pins lands of all FSB agents TRST Input TRST Test Reset resets the Test Access Port TAP logic TRST must be driven low during power on Reset VCC Input VCC are the power pins for the processor The voltage supplied to these pins is determined by the VID 5 0 pins VCCA Input VCCA provides isolated power for the internal processor core PLLs VCCIOPLL Input VCCIOPLL provides isolated power for internal processor FSB PLLs VCC_SENSE Output VCC_SENSE is an isolated low impedance connection to processor cor
27. settings within the VID range Please note this differs from the VID employed by the processor during a power management event Thermal Monitor 2 or Enhanced HALT State 3 These voltages are targets only A variable voltage source should exist on systems in the event that a differ ent voltage is required See Section 2 4 and Table 2 2 for more information 4 The voltage specification requirements are measured across VCC_SENSE and VSS_SENSE lands at the socket with a 100 MHz bandwidth oscilloscope 1 5 pF maximum probe capacitance and 1 MQ minimum impedance The maximum length of ground wire on the probe should be less than 5 mm Ensure external noise from the system is not coupled into the oscilloscope probe 5 Refer to Table 2 10 and Figure 2 3 for the minimum typical and maximum Vcc allowed for a given current Datasheet The processor should not be subjected to any Vcc and Icc combination wherein Vcc exceeds Vcc max for a given current E 23 Electrical Specifications I n 6 775 VR CONFIG 04A and 775 VR CONFIG 04B refer to voltage regulator configurations that are de fined in the Volfage Regulator Down VRD 10 1 Design Guide For Desktop LGA775 Socket 7 Refer to Table 2 9 and Figure 2 2 for the minimum typical and maximum Vcc allowed for a given current The processor should not be subjected to any Vcc and Icc combination wherein Vog exceeds Voc max for a given current E 8 These frequencies will operate properly in a system
28. the Intel 387 coprocessor and is included for compatibility with systems using MS DOS type floating point error reporting When STPCLK is asserted an assertion of FERR PBE indicates that the processor has a pending break event waiting for service The assertion of FERR PBE indicates that the processor should be returned to the Normal state For additional information on the pending break event functionality including the identification of support of the feature and enable disable information refer to volume 3 of the Intel Architecture Software Developer s Manual and the Intel Processor Identification and the CPUID Instruction application note GTLREF Input GTLREF determines the signal reference level for GTL input signals GTLREF is used by the GTL receivers to determine if a signal is a logical O or logical 1 GTLREF_SEL Output GTLREF_SEL is used to select the appropriate chipset GTLREF voltage HIT HITM Input Output Input Output HIT Snoop Hit and HITM Hit Modified convey transaction snoop operation results Any FSB agent may assert both HIT and HITM together to indicate that it requires a snoop stall which can be continued by reasserting HIT and HITM together IERR Output IERR Internal Error is asserted by a processor as the result of an internal error Assertion of IERR is usually accompanied by a SHUTDOWN transaction on the processor FSB This transaction may
29. variable voltage control or 3 pin PWM control The power header on the baseboard must be positioned to allow the fan heatsink power cable to reach it The power header identification and location should be documented in the platform documentation or on the system board itself Figure 7 6 shows the location of the fan power connector relative to the processor socket The baseboard power header should be positioned within 110 mm 4 33 inches from the center of the processor socket Figure 7 5 Boxed Processor Fan Heatsink Power Cable Connector Description Table 7 1 Straight square pin 4 pin terminal housing with 1 GND polarizing ribs and friction locking ramp x SCH 0 100 pitch 0 025 square pin width 4 CONTROL Match with straight pin friction lock header on mainboard Boxed_Proc_PwrCable Fan Heatsink Power and Signal Specifications Description Min Typ Max Unit Notes 12 V 12 volt fan power supply 10 2 12 13 8 V i IC Peak Fan current draw 1 1 1 5 A Fan start up current draw 2 2 A Fan start up current draw maximum duration 1 0 Second pulses per fan 1 SENSE SENSE frequency 2 revolution CONTROL 2100 2500 2800 Hz 2 3 NOTES 1 Baseboard should pull this pin up to 5V with a resistor 2 Open drain type pulse width modulated 3 Fan will have pull up resistor to 4 75 V maximum of 5 25 V Datasheet intel Boxed Processor Specifications
30. with its lifetime degraded depending on exposure to conditions exceeding the functional operation condition limits At conditions exceeding absolute maximum and minimum ratings neither functionality nor long term reliability can be expected Moreover if a device is subjected to these conditions for any length of time then when returned to conditions within the functional operating condition limits it will either not function or its reliability will be severely degraded Although the processor contains protective circuitry to resist damage from static electric discharge precautions should always be taken to avoid high static voltages or electric fields Processor DC Absolute Maximum Ratings Symbol Parameter Min Max Unit Notes 2 Vcc rae voltage with respect to 03 1 55 V ss FSB termination voltage with E yT respect to Vss 0 3 192 a Te Processor case temperature See Section 5 See Section 5 C TSTORAGE Processor storage temperature 40 85 C 3 4 NOTES For functional operation all processor electrical signal quality mechanical and thermal specifications must be satisfied i 2 Excessive overshoot or undershoot on any signal will likely result in permanent damage to the processor 3 Storage temperature is applicable to storage conditions only In this scenario the processor must not receive a clock and no lands can be connected to a voltage bias Storage within these limits wi
31. 0 069 0 095 30 0 051 0 078 0 104 35 0 060 0 086 0 113 40 0 068 0 095 0 122 45 0 077 0 104 0 131 50 0 085 0 113 0 140 55 0 094 0 121 0 149 60 0 102 0 130 0 158 65 0 111 0 139 0 167 70 0 119 0 148 0 176 75 0 128 0 156 0 185 78 0 133 0 162 0 190 NOTES 1 The loadline specification includes both static and transient limits except for overshoot allowed as shown in Section 2 12 2 This table is intended to aid in reading discrete points on Figure 2 2 3 Theloadlines specify voltage limits at the die measured at the VCC SENSE and VSS SENSE lands Voltage regulation feedback for voltage regulator circuits must be taken from processor Vcc and Vgs lands Refer to the Voltage Regulator Down VRD 10 1 Design Guide For Desktop LGA775 Socket for socket loadline guide lines and VR implementation details 24 Datasheet n Electrical Specifications Figure 2 2 Vcc Static and Transient Tolerance for 775_VR_CONFIG_04A Icc A 0 10 20 30 40 50 60 70 VID 0 000 i VID 0 025 Vec Maximum VID 0 050 VID 0 075 4 Vcc Typical Vcc m VID 0 200 NOTES 1 The loadline specification includes both static and transient limits except for overshoot allowed as shown in Section 2 12 2 This loadline specification shows the deviation from the VID set point 3 The loadlines specify voltage limits at the die measured at the VCC SENSE and VSS SENSE la
32. 0 155 0 180 0 205 NOTES 1 The loadline specification includes both static and transient limits except for overshoot allowed as shown in Section 2 12 2 This table is intended to aid in reading discrete points on Figure 2 2 3 Theloadlines specify voltage limits at the die measured at the VCC SENSE and VSS_SENSE lands Voltage regulation feedback for voltage regulator circuits must be taken from processor Vcc and Vss lands Refer to the Voltage Regulator Down VRD 10 1 Design Guide For Desktop LGA775 Socketfor socket loadline guide lines and VR implementation details Datasheet n Electrical Specifications Figure 2 3 Vcc Static and Transient Tolerance for 775_VR_CONFIG_04B Icc A 0 10 20 30 40 50 60 70 80 90 100 110 120 VID 0 000 1 L 1 1 L 1 1 L 1 L 1 VID 0 019 VID 0 038 Vcc Maximum Vcc Minimum SE VID 0 057 4 VID 0 076 VID 0 095 Vcc Typical VID 0 114 5 Vec V VID 0 133 y VID 0 152 y VID 0 171 y VID 0 190 y VID 0 209 y VID 0 228 NOTES 1 The loadline specification includes both static and transient limits except for overshoot allowed as shown in Section 2 12 2 This loadline specification shows the deviation from the VID set point 3 The loadlines specify voltage limits at the die measured at the VCC SENSE and VSS SENSE lands Voltage regulation feedback for voltage regulator circuits must be taken from processor Vcc
33. 2 6 defines the possible combinations of the signals and the frequency associated with each combination The required frequency is determined by the processor chipset and clock synthesizer All agents must operate at the same frequency The Pentium 4 processor in the 775 land package currently operates at a 533 MHz or 800 MHz FSB frequency selected by a 133 MHz or 200 MHz BCLK 1 0 frequency Individual processors will only operate at their specified FSB frequency For more information about these signals refer to Section 4 2 Table 2 6 BSEL 2 0 Frequency Table for BCLK 1 0 Datasheet BSEL2 BSEL1 BSELO FSB Frequency L L L RESERVED L L H 133 MHz E H H RESERVED L H L 200 MHz H L L RESERVED H L H RESERVED H H H RESERVED H H L RESERVED 21 Electrical Specifications 2 10 Table 2 7 2 11 22 In Absolute Maximum and Minimum Ratings Table 2 7 specifies absolute maximum and minimum ratings Within functional operation limits functionality and long term reliability can be expected At conditions outside functional operation condition limits but within absolute maximum and minimum ratings neither functionality nor long term reliability can be expected If a device is returned to conditions within functional operation limits after having been subjected to conditions outside these limits but within the absolute maximum and minimum ratings the device may be functional but
34. 5 D33 Source Synch Input Outpu D4 HIT Common Clock Input Output E16 D34 Source Synch Input Outpu D5 VSS Power Other E17 VSS Power Other D6 VSS Power Other E18 D39 Source Synch Input Outpu D7 D20 Source Synch Input Output E19 D40 Source Synch Input Outpu D8 D12 Source Synch Input Output E20 VSS Power Other D9 VSS Power Other E21 D42 Source Synch Input Outpu D10 D22 Source Synch Input Output E22 D45 Source Synch Input Outpu D11 D15 Source Synch Input Output E23 RESERVED D12 VSS Power Other E24 RESERVED D13 D25 Source Synch Input Output E25 VSS Power Other D14 RESERVED E26 VSS Power Other D15 VSS Power Other E27 VSS Power Other D16 RESERVED E28 VSS Power Other D17 D49 Source Synch Input Output E29 VSS Power Other D18 VSS Power Other F2 FC5 Common Clock Input D19 DBl2 Source Synch Input Output F3 BRO Common Clock Input Output D20 D48 Source Synch Input Output F4 VSS Power Other D21 VSS Power Other F5 RS1 Common Clock Input D22 D46 Source Synch Input Output F6 RESERVED D23 RESERVED F7 VSS Power Other D24 VSS Power Other F8 D17 Source Synch Input Output D25 VTT Power Other F9 D18 Source Synch Input Output D26 VTT Power Other F10 VSS Power Other D27 VTT Power Other F11 D23 Source Synch Input Output D28 VTT Power Other F12 D24 Source Synch Input Output D29 VTT Power Other F13 VSS Power Other D30 VTT Power Other F14 D28 Source Synch Input Output E2 VSS Power Other F15 D30 Source Synch Inp
35. 58 C21 Source Synch Input Output HITM EA Common Clock Input Output D59 B21 Source Synch Input Output IERR AB2 Asynch GTL Output D60 B19 Source Synch Input Output IGNNE N2 Asynch GTL Input D61 A19 Source Synch Input Output INIT P3 Asynch GTL Input D62 A22 Source Synch Input Output ITP_CLKO AK3 TAP Input 45 Land Listing and Signal Descriptions 46 In Table 4 1 Alphabetical Land Table 4 1 Alphabetical Land Assignments Assignments Land Name ae oo Direction Land Name ei DEE Direction ITP_CLK1 AJ3 TAP Input RESERVED Y3 LINTO K1 Asynch GTL Input RESERVED D23 LINT1 L1 Asynch GTL Input RESERVED AK6 LL_IDO v2 Power Other Output RESERVED G6 LL ID1 AA2 Power Other Output RESET G23 Common Clock Input LOCK C3 Common Clock Input Output RSO B3 Common Clock Input MCERR AB3 Common Clock Input Output RS1 F5 Common Clock Input MSIDO Wi Power Other Output RS2 A3 Common Clock Input MSID1 VI Power Other Output RSP H4 Common Clock Input PROCHOT AL2 Asynch GTL Input Output SKTOCC AE8 Power Other Output PWRGOOD N1 Power Other Input SMI P2 Asynch GTL Input REQO K4 Source Synch Input Output STPCLK M3 Asynch GTL Input REQ1 J5 Source Synch Input Output TCK AE1 TAP Input REQ2 M6 Source Synch Input Output TDI AD1 TAP Input REQ3 K6
36. 750 1 1 0 0 0 0 1 4500 0 0 0 0 0 0 1 0875 0 1 0 0 0 0 1 4625 1 1 1 1 1 1 VR output off 1 0 1 1 1 1 1 4750 0 1 1 1 1 1 VR output off 0 0 1 1 1 1 1 4875 1 1 1 1 1 0 1 1000 1 0 1 1 1 0 1 5000 0 1 1 1 1 0 1 1125 0 0 1 1 1 0 1 5125 1 1 1 1 0 1 1 1250 1 0 1 1 0 1 1 5250 0 1 1 1 0 1 1 1375 0 0 1 1 0 1 1 5375 1 1 1 1 0 0 1 1500 1 0 1 1 0 0 1 5500 0 1 1 1 0 0 1 1625 0 0 1 1 0 0 1 5625 1 1 1 0 1 1 1 1750 1 0 1 0 1 1 1 5750 0 1 1 0 1 1 1 1875 0 0 1 0 1 1 1 5875 1 1 1 0 1 0 1 2000 1 0 1 0 1 0 1 6000 16 Datasheet In 2 4 1 Electrical Specifications Phase Lock Loop PLL Power and Filter Vcca and V eciopLL are power sources required by the PLL clock generators for the Pentium A processor in the 775 land package Since these PLLs are analog they require low noise power supplies for minimum jitter Jitter is detrimental to the system it degrades external I O timings as well as internal core timings i e maximum frequency To prevent this degradation these supplies must be low pass filtered from Vyr The AC low pass requirements with input at Var are as follows lt 0 2 dB gain in pass band lt 0 5 dB attenuation in pass band lt 1 Hz gt 34 dB attenuation from 1 MHz to op MHz gt 28 dB attenuation from op MHz to core frequency The filter requirements are illustrated in Figure 2 1 Figure 2 1 Phase Lock Loop PLL Filter Requirements Datasheet 0 2 dB 0 dB 0 5 dB Forbidden Zone 28 dB 34 dB D
37. C 1 Hz fpeak 1MHz 66MHz fcore lt i Passband High Frequency Band Filter _Spec NOTES 1 Diagram not to scale 2 No specification exists for frequencies beyond fcore core frequency 3 fpeak if existent should be less than 0 05 MHz 17 Electrical Specifications I ntel E 2 5 Reserved Unused FC and TESTHI Signals All RESERVED signals must remain unconnected Connection of these signals to Vcc Vss VTT or to any other signal including each other can result in component malfunction or incompatibility with future processors See Chapter 4 for a land listing of the processor and the location of all RESERVED signals For reliable operation always connect unused inputs or bidirectional signals to an appropriate signal level In a system level design on die termination has been included on the Pentium 4 processor in the 775 land package to allow signals to be terminated within the processor silicon Most unused GTL inputs should be left as no connects as GTL termination is provided on the processor silicon However see Table 2 4 for details on GTL signals that do not include on die termination Unused active high inputs should be connected through a resistor to ground Vss Unused outputs can be left unconnected however this may interfere with some test access port TAP functions complicate debug probing and prevent boundary scan testing A resistor must be used when tying bidirectional signals to power or ground Whe
38. C can not be activated via the on demand mode The Thermal Monitor TCC however can be activated through the use of the on demand mode On Demand Mode The Pentium 4 processor in the 775 land package provides an auxiliary mechanism that allows system software to force the processor to reduce its power consumption This mechanism is referred to as On Demand mode and is distinct from the Thermal Monitor feature On Demand mode is intended as a means to reduce system level power consumption Systems using the Pentium 4 processor in the 775 land package must not rely on software usage of this mechanism to limit the processor temperature If bit 4 of the ACPI P_CNT Control Register located in the processor 1A32_THERM_CONTROL MSR is written to a 1 the processor will immediately reduce its power consumption via modulation starting and stopping of the internal core clock independent of the processor temperature When using On Demand mode the duty cycle of the clock modulation is programmable via bits 3 1 of the same ACPI P_CNT Control Register In On Demand mode the duty cycle can be programmed from 12 5 on 87 5 off to 87 5 on 12 5 off in 12 5 increments On Demand mode may be used in conjunction with the Thermal Monitor If the system tries to enable On Demand mode at the same time the TCC is engaged the factory configured duty cycle of the TCC will override the duty cycle selected by the On Demand mode PROCHOT Signal An external si
39. Datasheet Table 4 1 Alphabetical Land Land Listing and Signal Descriptions Table 4 1 Alphabetical Land Assignments Assignments Land Name Ka lh Direction Land Name a hi a Direction D23 F11 Source Synch Input Output D63 B22 Source Synch Input Output D24 F12 Source Synch Input Output DBIO A8 Source Synch Input Output D25 D13 Source Synch Input Output DBI14 G11 Source Synch Input Output D26 E13 Source Synch Input Output DBI2 D19 Source Synch Input Output D27 G13 Source Synch Input Output DBI3 C20 Source Synch Input Output D28 F14 Source Synch Input Output DBR AC2 Power Other Output D29 G14 Source Synch Input Output DBSY B2 Common Clock Input Output D30 F15 Source Synch Input Output DEFER G7 Common Clock Input D31 G15 Source Synch Input Output DPO J16 Common Clock Input Output D32 G16 Source Synch Input Output DP1 H15 Common Clock Input Output D33 E15 Source Synch Input Output DP2 H16 Common Clock Input Output D34 E16 Source Synch Input Output DP3 J17 Common Clock Input Output D35 G18 Source Synch Input Output DRDY C1 Common Clock Input Output D36 G17 Source Synch Input Output DSTBNO C8 Source Synch Input Output D37 F17 Source Synch Input Output DS
40. Direction Land Name Type Direction VCC K29 Power Other VCC U30 Power Other VCC K30 Power Other VCC U8 Power Other VCC K8 Power Other VCC V8 Power Other VCC L8 Power Other VCC W23 Power Other VCC M23 Power Other VCC W24 Power Other VCC M24 Power Other VCC W25 Power Other VCC M25 Power Other VCC W26 Power Other VCC M26 Power Other VCC W27 Power Other VCC M27 Power Other VCC W28 Power Other VCC M28 Power Other VCC W29 Power Other VCC M29 Power Other VCC W30 Power Other VCC M30 Power Other VCC ws Power Other VCC M8 Power Other VCC Y23 Power Other VCC N23 Power Other VCC Y24 Power Other VCC N24 Power Other VCC Y25 Power Other VCC N25 Power Other VCC Y26 Power Other VCC N26 Power Other VCC Y27 Power Other VCC N27 Power Other VCC Y28 Power Other VCC N28 Power Other VCC Y29 Power Other VCC N29 Power Other VCC Y30 Power Other VCC N30 Power Other VCC Y8 Power Other VCC N8 Power Other VCC_MB REGULATION AN5 Power Other Output VCC P8 Power Other VCC_SENSE AN3 Power Other Output VCC R8 Power Other VCCA A23 Power Other VCC T23 Power Other VCCIOPLL C23 Power Other VCC T24 Power Other VIDO AM2 Power Other Output VCC T25 Power Other VID1 AL5 Power Other Output VCC T26 Power Other VID2 AM3 Power Other Output VCC T27 Power Other VID3 AL6 Power Other Output VCC T28 Power Other VID4 AK4 Power Other Output VCC T29 Power Other VID5 AL4 Power Other Output VCC T30 Power Other VSS A12 Power
41. Guidelines for details on the processor weight and heatsink requirements Boxed Processor Retention Mechanism and Heatsink Attach Clip Assembly The boxed processor thermal solution requires a heatsink attach clip assembly to secure the processor and fan heatsink in the baseboard socket The boxed processor will ship with the heatsink attach clip assembly Electrical Requirements Fan Heatsink Power Supply The boxed processor s fan heatsink requires a 12 V power supply A fan power cable will be shipped with the boxed processor to draw power from a power header on the baseboard The power cable connector and pinout are shown in Figure 7 5 Baseboards must provide a matched power header to support the boxed processor Table 7 1 contains specifications for the input and output signals at the fan heatsink connector 89 Boxed Processor Specifications I ntel E 90 The fan heatsink outputs a SENSE signal that is an open collector output that pulses at a rate of 2 pulses per fan revolution A baseboard pull up resistor provides Voy to match the system board mounted fan speed monitor requirements if applicable Use of the SENSE signal is optional If the SENSE signal is not used pin 3 of the connector should be tied to GND The fan heatsink receives a PWM signal from the motherboard from the 4th pin of the connector labeled as CONTROL The boxed processor s fan heatsink requires a constant 12 V supplied to pin 2 and does not support
42. HI signals TESTHI13 cannot be grouped with other TESTHI signals Datasheet In 2 6 tel Electrical Specifications FSB Signal Groups The FSB signals have been combined into groups by buffer type GTL input signals have differential input buffers which use GTLREF as a reference level In this document the term GTL Input refers to the GTL input group as well as the GTL I O group when receiving Similarly GTL Output refers to the GTL output group as well as the GTL I O group when driving With the implementation of a source synchronous data bus comes the need to specify two sets of timing parameters One set is for common clock signals which are dependent upon the rising edge of BCLKO ADS HIT HITMA etc and the second set is for the source synchronous signals which are relative to their respective strobe lines data and address as well as the rising edge of BCLKO Asychronous signals are still present A20M IGNNEF etc and can become active at any time during the clock cycle Table 2 3 identifies which signals are common clock source synchronous and asynchronous Table 2 3 FSB Signal Groups Signal Group Type Signals GTL Common Clock Input Synchronous to BCLK 1 0 BPRI DEFER RESET RS 2 0 RSP TRDY GTL Common Clock UO Synchronous to BCLK 1 0 AP 1 0 ADS BINIT BNR BPIM 5 0 BRO DBSY DP 3 0 DRDY HIT HITM LOCK MCERR GTL Source Syn
43. Ls VSS_SENSE Output VSS_SENSE is an isolated low impedance connection to processor core Vgg It can be used to sense or measure ground near the silicon with little noise VSS_MB_ REGULATION Output This land is provided as a voltage regulator feedback sense point for V se It is connected internally in the processor package to the sense point land V27 as described in the Voltage Regulator Down VRD 10 1 Design Guide for Desktop Socket 775 VTT Miscellaneous voltage supply VTT_OUT_LEFT VTT_OUT_RIGHT Output The VTT_OUT_LEFT and VTT_OUT_RIGHT signals are included to provide a voltage supply for some signals that require termination to Vtr on the motherboard For future processor compatibility some signals are required to be pulled up to VTT_OUT_LEFT or VTT_OUT_RIGHT Refer to the following table for the signals that should be pulled up to VTT_OUT_LEFT and VTT_OUT_RIGHT Pull up Signal Signals to be Pulled Up VTT_PWRGOOD VID 5 0 GTLREF TMS TDI TDO BPM 5 0 other VRD components RESET BRO PWRGOOD TESTHI1 TESTHI8 TESTHI9 TESTHI10 TESTHI11 TESTHI12 VTT_OUT_RIGHT VTT_OUT_LEFT VTT_SEL Output The VTT_SEL signal is used to select the correct V voltage level for the processor VTTPWRGD Input The processor requires this input to determine that the V voltages are stable and within specification Datasheet Land Listing and Signal Descriptions
44. N6 Power Other VSS H12 Power Other VSS N7 Power Other VSS H13 Power Other VSS P23 Power Other VSS H14 Power Other VSS P24 Power Other VSS H17 Power Other VSS P25 Power Other VSS H18 Power Other VSS P26 Power Other VSS H19 Power Other VSS P27 Power Other VSS H20 Power Other VSS P28 Power Other VSS H21 Power Other VSS P29 Power Other VSS H22 Power Other VSS P30 Power Other VSS H23 Power Other VSS P4 Power Other VSS H24 Power Other VSS P7 Power Other vss H25 Power Other vss R2 Power Other vss H26 Power Other vss R23 Power Other vss H27 Power Other VSS R24 Power Other VSS H28 Power Other VSS R25 Power Other VSS H3 Power Other VSS R26 Power Other VSS H6 Power Other VSS R27 Power Other VSS H7 Power Other VSS R28 Power Other VSS H8 Power Other VSS R29 Power Other Datasheet Datasheet Table 4 1 Alphabetical Land Assignments Land Listing and Signal Descriptions Table 4 1 Alphabetical Land Assignments Land Name ZS Re i Direction Land Name ae a Direction VSS R30 Power Other VTT C26 Power Other VSS R5 Power Other VTT C27 Power Other VSS R7 Power Other VTT C28 Power Other VSS T3 Power Other VTT C29 Power Other VSS T6 Power Other VTT C30 Power Other VSS T7 Power Other VTT D25 Power Other VSS U1 Power Other
45. Other VCC T8 Power Other VSS A15 Power Other VCC U23 Power Other VSS A18 Power Other VCC U24 Power Other VSS A2 Power Other VCC U25 Power Other VSS A21 Power Other VCC U26 Power Other VSS A24 Power Other VCC U27 Power Other VSS A6 Power Other VCC U28 Power Other VSS AQ Power Other VCC U29 Power Other VSS AA23 Power Other 49 Land Listing and Signal Descriptions 50 Table 4 1 Alphabetical Land Assignments Intel Table 4 1 Alphabetical Land Assignments Land Name send ii i Direction Land Name Ean wee Direction VSS AA24 Power Other VSS AF10 Power Other VSS AA25 Power Other VSS AF13 Power Other VSS AA26 Power Other VSS AF16 Power Other VSS AA27 Power Other VSS AF17 Power Other VSS AA28 Power Other VSS AF20 Power Other VSS AA29 Power Other VSS AF23 Power Other VSS AA3 Power Other VSS AF24 Power Other VSS AA30 Power Other VSS AF25 Power Other VSS AA6 Power Other VSS AF26 Power Other VSS AA7 Power Other VSS AF27 Power Other VSS AB1 Power Other VSS AF28 Power Other VSS AB23 Power Other VSS AF29 Power Other VSS AB24 Power Other VSS AF3 Power Other VSS AB25 Power Other VSS AF30 Power Other VSS AB26 Power Other VSS AF6 Power Other VSS AB27 Power Other VSS AF7 Power Other VSS AB28 Power Ot
46. P Input AF13 VSS Power Other AE2 VSS Power Other AF14 VCC Power Other AE3 RESERVED AF15 VCC Power Other AE4 RESERVED AF16 VSS Power Other AE5 VSS Power Other AF17 VSS Power Other AE6 RESERVED AF18 VCC Power Other AE7 VSS Power Other AF19 VCC Power Other AE8 SKTOCCH Power Other Output AF20 VSS Power Other AE9 VCC Power Other AF21 VCC Power Other AE10 vss Power Other AF22 VCC Power Other AE11 VCC Power Other AF23 VSS Power Other AE12 VCC Power Other AF24 VSS Power Other AE13 VSS Power Other AF25 VSS Power Other AE14 VCC Power Other AF26 VSS Power Other AE15 VCC Power Other AF27 VSS Power Other AE16 VSS Power Other AF28 VSS Power Other AE17 VSS Power Other AF29 VSS Power Other AE18 VCC Power Other AF3 VSS Power Other AE19 VCC Power Other AF30 VSS Power Other AE20 VSS Power Other AG TRST TAP Input AE21 VCC Power Other AG2 BPM3 Common Clock Input Output AE22 VCC Power Other AG3 BPM5 Common Clock Input Output AE23 VCG Power Other AG4 A30 Source Synch Input Output AE24 VSS Power Other AG5 A31 Source Synch Input Output AE25 Vss Power Other AG6 A29 Source Synch Input Output AE26 vss Power Other AG7 VSS Power Other AE27 VSS Power Other AG8 VCC Power Other AE28 VSS Power Other AG9 VCC Power Other AE29 VSS Power Other AG10 VSS Power Other AE30 VSS Power Other AG11 VCC Power Other Datasheet m Land Listing and Signal Descriptions Table 4 2 Numerical Land Assignment Table 4 2 Numerical Land Assignment
47. SS Power Other AL28 VSS Power Other AK18 VCC Power Other AL29 VCC Power Other AK19 VCC Power Other AL30 VCC Power Other AK20 VSS Power Other AM1 VSS Power Other AK21 VCC Power Other AM2 VIDO Power Other Output AK22 VCC Power Other AM3 VID2 Power Other Output AK23 VSS Power Other AM4 VSS Power Other AK24 VSS Power Other AM5 FC11 Power Other Output AK25 VCG Power Other AM7 FC12 Power Other Output AK26 VCC Power Other AM8 VCC Power Other AK27 VSS Power Other AM9 VCC Power Other AK28 VSS Power Other AM10 VSS Power Other AK29 VSS Power Other AM11 VCC Power Other AK30 VSS Power Other AM12 VCC Power Other AL1 THERMDA Power Other AM13 VSS Power Other AL2 PROCHOT Asynch GTL Input Output AM14 VCC Power Other AL3 VSS Power Other AM15 VCC Power Other AL4 VID5 Power Other Output AM16 VSS Power Other AL5 VID1 Power Other Output AM17 VSS Power Other AL6 VID3 Power Other Output AM18 VCC Power Other AL7 VSS Power Other AM19 VCC Power Other AL8 VCC Power Other AM20 VSS Power Other AL9 VCC Power Other AM21 VCC Power Other AL10 VSS Power Other AM22 VCC Power Other AL11 VCC Power Other AM23 VSS Power Other AL12 VCC Power Other AM24 VSS Power Other AL13 VSS Power Other AM25 VCC Power Other AL14 VCC Power Other AM26 VCC Power Other Datasheet Datasheet Table 4 2 Numerical Land Assignment Land Listing and Signal Descriptions Table 4 2 Numerical Land Assignment
48. SS VSS VSS VCC VCC VCC VSS VCC VCC VSS VSS VCC AD VCC VCC VCC VCC VCC VCC VCC VCC AC VCC VCC VCC VCC VCC VCC VCC VCC AB VSS VSS VSS VSS VSS VSS VSS VSS AA VSS VSS VSS VSS VSS VSS VSS VSS Y VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC w v VSS VSS VSS VSS VSS VSS VSS VSS U VCC VCC VCC VCC VCC VCC VCC VCC T VCC VCC VCC VCC VCC VCC VCC VCC R VSS VSS VSS VSS VSS VSS VSS VSS P VSS VSS VSS VSS VSS VSS VSS VSS N VCC VCC VCC VCC VCC VCC VCC VCC M VCC VCC VCC VCC VCC VCC VCC VCC L VSS VSS VSS VSS VSS VSS VSS VSS K VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC DP3 DPO VCC H sel SCC vss vss vss vss vss vss vss vss vss vss vss vss DP2 DP1 G BSEL2 BSELO BCLK1 TESTHI4 TESTHIS TESTHI TESTHI6 RESET D47 D44 DSTBN2 DSTBP2 D35 D36 D32 D31 F RSVD BCLKO vTT_SEL TESTHIO TESTHI2 TESTHI7 RsvD vss D43 pas vss D38 D37 vss D30 E vss vss vss vss vss rsvp Rsvp Da5 D428 vss p4o pace vss D34 D33 D vit wr vrr vr vrt vt vss rsvp p4s vss pase peiz vss Dan Rsvp vss c wt vt r wt wt vt vss Ke vss Dag pp vss D54 DSTBP3 vss D51 vit vit vrt vr vrr vm vss vssa
49. Source Synch Input Output A5 D4 Source Synch Input Output B16 D55 Source Synch Input Output A6 VSS Power Other B17 VSS Power Other A7 D7 Source Synch Input Output B18 D57 Source Synch Input Output A8 DBIO Source Synch Input Output B19 D60 Source Synch Input Output AQ VSS Power Other B20 VSS Power Other A10 D8 Source Synch Input Output B21 D59 Source Synch Input Output A11 D9 Source Synch Input Output B22 D63 Source Synch Input Output A12 VSS Power Other B23 VSSA Power Other A13 COMPO Power Other Input B24 VSS Power Other A14 D50 Source Synch Input Output B25 VTT Power Other A15 VSS Power Other B26 VTT Power Other A16 DSTBN3 Source Synch Input Output B27 VTT Power Other A17 D56 Source Synch Input Output B28 VTT Power Other A18 VSS Power Other B29 VTT Power Other A19 D61 Source Synch Input Output B30 VTT Power Other A20 RESERVED C1 DRDY Common Clock Input Output A21 VSS Power Other C2 BNR Common Clock Input Output A22 D62 Source Synch Input Output C3 LOCK Common Clock Input Output A23 VCCA Power Other C4 VSS Power Other A24 VSS Power Other C5 D1 Source Synch Input Output A25 VTT Power Other C6 D3 Source Synch Input Output A26 VTT Power Other C7 VSS Power Other A27 VTT Power Other c8 DSTBNO Source Synch Input Output A28 VTT Power Other c9 RESERVED A29 VTT Power Other C10 VSS Power Other A30 VTT Power Other C11 D11 Source Synch Input Output B1 VSS Power Other C12 D14 Source Synch Inp
50. Source Synch Input Output TDO AF1 TAP Output REQ4 J6 Source Synch Input Output TESTHIO F26 Power Other Input RESERVED A20 TESTHI1 W3 Power Other Input RESERVED AC4 TESTHI2 F25 Power Other Input RESERVED AE3 TESTHI3 G25 Power Other Input RESERVED AE4 TESTHI4 G27 Power Other Input RESERVED AE6 TESTHI5 G26 Power Other Input RESERVED AH2 TESTHI6 G24 Power Other Input RESERVED C9 TESTHI7 F24 Power Other Input RESERVED D1 TESTHI8 G3 Power Other Input RESERVED D14 TESTHI9 G4 Power Other Input RESERVED D16 TESTHI10 H5 Power Other Input RESERVED E23 TESTHI11 P1 Power Other Input RESERVED E24 TESTHI12 w2 Power Other Input RESERVED E5 TESTHI13 L2 Asynch GTL Input RESERVED E6 THERMDA AL1 Power Other RESERVED E7 THERMDC AK1 Power Other RESERVED F23 THERMTRIP M2 Asynch GTL Output RESERVED F29 TMS AC1 TAP Input RESERVED F6 TRDY E3 Common Clock Input RESERVED G10 TRST AG1 TAP Input RESERVED B13 VCC AA8 Power Other RESERVED J3 VCC AB8 Power Other RESERVED N4 VCC AC23 Power Other RESERVED N5 VCC AC24 Power Other RESERVED P5 VCC AC25 Power Other Datasheet Datasheet Table 4 1 Alphabetical Land Assignments Land Listing and Signal Descriptions Table 4 1 Alphabetical Land Assignments Land Name sl Direction Land Name a SES Directi
51. TBN1 G12 Source Synch Input Output D38 F18 Source Synch Input Output DSTBN2 G20 Source Synch Input Output D39 E18 Source Synch Input Output DSTBN3 A16 Source Synch Input Output D40 E19 Source Synch Input Output DSTBPO B9 Source Synch Input Output D41 F20 Source Synch Input Output DSTBP1 E12 Source Synch Input Output D42 E21 Source Synch Input Output DSTBP2 G19 Source Synch Input Output D43 F21 Source Synch Input Output DSTBP3 C17 Source Synch Input Output D44 G21 Source Synch Input Output FC1 G2 Power Other Input D45 E22 Source Synch Input Output FC2 R1 Power Other Input D46 D22 Source Synch Input Output FC3 J2 Power Other Input D47 G22 Source Synch Input Output FC4 T2 Power Other Input D48 D20 Source Synch Input Output FC5 F2 Common Clock Input D49 D17 Source Synch Input Output FC6 H2 Power Other Input D50 A14 Source Synch Input Output FC7 G5 Source Synch Output D51 C15 Source Synch Input Output FC11 AM5 Power Other Output D52 C14 Source Synch Input Output FC12 AM7 Power Other Output D53 B15 Source Synch Input Output FC16 AN7 Power Other Output D54 C18 Source Synch Input Output FERR PBE R3 Asynch GTL Output D55 B16 Source Synch Input Output GTLREF Hi Power Other Input D56 A17 Source Synch Input Output GTLREF_SEL H29 Power Other Output D57 B18 Source Synch Input Output HIT D4 Common Clock Input Output D
52. The voltage set by the VID signals is the reference VR output voltage to be delivered to the processor Vcc pins A minimum voltage is provided in Table 2 8 and changes with frequency This allows processors running at a higher frequency to have a relaxed minimum voltage specification The specifications have been set such that one voltage regulator can work with all supported frequencies Individual processor VID values may be calibrated during manufacturing such that two devices at the same speed may have different VID settings The Pentium 4 processor in the 775 land package uses six voltage identification signals VID S 0 to support automatic selection of power supply voltages Table 2 2 specifies the voltage level corresponding to the state of VID S 0 A 1 in this table refers to a high voltage level and a 0 refers to low voltage level If the processor socket is empty VID 5 0 x11111 or the voltage regulation circuit cannot supply the voltage that is requested it must disable itself See the Voltage Regulator Down VRD 10 1 Design Guide For Desktop LGA775 Socket for more details Power source characteristics must be guaranteed to be stable when the supply to the voltage regulator is stable The LL_ID 1 0 lands are used by the platform to configure the proper loadline slope for the processor LL_ID 1 0 00 for the Pentium 4 processor in the 775 land package The VTT_SEL land is used by the platform to configure the prope
53. VSS A14 A15 VSS LL_IDO MSID1 VCC VSS A10 A12 A13 AP1 APO VSS vcc vss vss A9 Au vss FC4 COMP vec vss ADSTBO VSS ase FERRH ss FC2 PBE VCC VSS A4 RSVD VSS INIT SMI TESTHI11 VCC vss vss RSVD RSVD VSS IGNNE PWRGOOD THER vec vss REQ2 A5 ave Lemos voan VSS VCC vss vss A3 A6 vss TESTHI13 LINT1 VCC VSS REQ3 VSS REQO A20M VSS LINTO vec vec vec vcc vec vec voc vss REQ4 REQ1 vss RSVD FC3 A VSS VSS VSS VSS VSS VSS VSS VSS VSS TESTHI10 RSP VSS FC6 GTLREF D29 D27 DSTBN1 DBI1 RSVD D16 BPRI DEFER RSVD FC7 TESTHI9 TESTHI8 FC1 VSS D28 VSS D24 D23 VSS D18 D17 VSS RSVD RS1 VSS BRO FC5 VSS D26 DSTBP1 VSS D21 D19 VSS RSVD RSVD RSVD HITM TRDY vss RSVD D25 VSS D15 D22 VSS D12 D20 vss vss HIT vss ADS RSVD D52 VSS D14 t D11 VSS RSVD DSTBNO vss D3 Di VSS LOCK BNR DRDY vss Rsvp man vss Dio DSTBPO vss D6 D5 VSS D0 neng DBSY VSS D50 compo vss p pse vss mmm Go VSS D4 D2 RS2 vss 14 13 12 11 10 9 8 7 6 5 4 3 2 1 Datasheet AN AM AL AK AJ AH AG AF AE AD AC AB 43 Land Listing and Signal Descriptions 44 Table 4 1 Alphabetical Land Intel Table 4 1 Alphabetical Land Assignments Assignments Land Name send i wai Direction Land Name wei ee Direction A3 L5 Source Synch Input Output BCLK1 G28 Clock
54. VTT D26 Power Other VSS U7 Power Other VTT D27 Power Other VSS V23 Power Other VTT D28 Power Other VSS V24 Power Other VTT D29 Power Other VSS V25 Power Other VTT D30 Power Other VSS V26 Power Other VTT_OUT_LEFT J1 Power Other Output VSS V27 Power Other VTT_OUT_RIGHT AA1 Power Other Output VSS V28 Power Other VTT_SEL F27 Power Other Output VSS V29 Power Other VTTPWRGD AM6 Power Other Input VSS V3 Power Other VSS V30 Power Other VSS V6 Power Other VSS V7 Power Other VSS W4 Power Other vss W7 Power Other VSS Y2 Power Other VSS Y5 Power Other VSS NT Power Other REGULACI N AN6 Power Other Output VSS_SENSE AN4 Power Other Output VSSA B23 Power Other VTT A25 Power Other VTT A26 Power Other VTT A27 Power Other VTT A28 Power Other VTT A29 Power Other VTT A30 Power Other VTT B25 Power Other VTT B26 Power Other VTT B27 Power Other VTT B28 Power Other VTT B29 Power Other VTT B30 Power Other VTT C25 Power Other 53 Land Listing and Signal Descriptions 54 Table 4 2 Numerical Land Assignment intel Table 4 2 Numerical Land Assignment we Land Name is Direction ae Land Name asl Direction A2 VSS Power Other B13 RESERVED A3 RS2 Common Clock Input B14 VSS Power Other A4 D2 Source Synch Input Output B15 D53
55. ain design defects or errors known as errata which may cause the product to deviate from published specifications Current characterized errata are available on request Contact your local Intel sales office or your distributor to obtain the latest specifications and before placing your product order THyper Threading Technology requires a computer system with an Intel Pentium 4 processor supporting Hyper Threading Technology and an HT Technology enabled chipset BIOS and operating system Performance will vary depending on the specific hardware and software you use See http www intel com info hyperthreading for more information including details on which processors support HT Technology 2Intel Extended Memory 64 Technology Intel EM64T requires a computer system with a processor chipset BIOS operating system device drivers and applications enabled for Intel EM64T Processor will not operate including 32 bit operation without an Intel EM64T enabled BIOS Performance will vary depending on your hardware and software configurations See http www intel com info em64t for more information including details on which processors support EM64T or consult with your system vendor for more information Intel Pentium Intel Xeon Intel NetBurst and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States and other countries Other names and brands may be claimed as the property of o
56. al 2 Output tristate SMI Execute BIST INIT In Order Queue pipelining set IOQ depth to 1 A7 Disable MCERR observation AQ Disable BINIT observation A10 APIC Cluster ID 0 3 A 12 11 Disable bus parking A15 Disable Hyper Threading Technology A31 Symmetric agent arbitration ID BR0 RESERVED A 6 3 A8 A 14 13 A 16 30 A 32 35 NOTES 1 Asserting this signal during RESET will select the corresponding option 2 Address signals not identified in this table as configuration options should not be asserted during RESET Clock Control and Low Power States The processor allows the use of AutoHALT and Stop Grant states to reduce power consumption by stopping the clock to internal sections of the processor depending on each particular state See Figure 6 1 for a visual representation of the processor low power states Normal State This is the normal operating state for the processor 83 Features 6 2 2 6 2 2 1 6 2 2 2 84 intel HALT and Enhanced HALT Powerdown States The processor supports the HALT or Enhanced HALT powerdown state The Enhanced HALT powerdown state is configured and enabled via the BIOS The Enhanced HALT state is a lower power state as compared to the Stop Grant State If Enhanced HALT is not enabled the default powerdown state entered will be HALT Refer to the sections below for details about the HALT and Enhanced HALT states HALT Powerdown State HALT is a low
57. al Diode Parameters Symbol Parameter Min Typ Max Unit Notes lew Forward Bias Current 11 187 HA 1 n Diode Ideality Factor 1 0083 1 011 1 023 2 3 4 5 Rr Series Resistance 3 242 3 33 3 594 Q 2 3 6 NOTES 1 Intel does not support or recommend operation of the thermal diode under reverse bias 2 Characterized at 75 C 3 Not 100 tested Specified by design characterization 4 The ideality factor n represents the deviation from ideal diode behavior as exemplified by the diode equation lew Is e gVp nkT 1 where lg saturation current q electronic charge Vp voltage across the diode k Boltzmann Constant and T absolute temperature Kelvin 5 Devices found to have an ideality factor of 1 0183 to 1 023 will create a temperature error approximately 2 C higher than the actual temperature In order to minimize any potential acoustic impact of this temperature error Tcontrol will be increased by 2 C on these parts 6 The series resistance Rr is provided to allow for a more accurate measurement of the thermal diode temperature Ry as defined includes the pins of the processor but does not include any socket resistance or board trace resistance between the socket and the external remote diode thermal sensor RT can be used by remote diode thermal sensors with automatic series resistance cancellation to calibrate out this error term Another application is that a temperature offset can be manu ally calculated and programmed int
58. al processors may have a lower TDP Therefore the maximum Tc will vary depending on the TDP of the individual processor Refer to thermal profile figure and associated table for the allowed combinations of power and Tc 1 Table 5 2 Thermal Profile for Processors with PRB 1 Sheet 1 of 2 Power W Maximum Tc C Power Maximum Tc C 0 44 0 60 59 0 2 44 5 62 59 5 4 45 0 64 60 0 6 45 5 66 60 5 8 46 0 68 61 0 10 46 5 70 61 5 12 47 0 72 62 0 14 47 5 74 62 5 16 48 0 76 63 0 18 48 5 78 63 5 20 49 0 80 64 0 22 49 5 82 64 5 24 50 0 84 65 0 26 50 5 86 65 5 28 51 0 88 66 0 30 51 5 90 66 5 32 52 0 92 67 0 34 52 5 94 67 5 36 530 96 68 0 Datasheet n Thermal Specifications and Design Considerations Table 5 2 Thermal Profile for Processors with PRB 1 Sheet 2 of 2 Power W Maximum Tc C Power Maximum Tc C 38 53 5 98 68 5 40 54 0 100 69 0 42 54 5 102 69 5 44 55 0 104 70 0 46 55 5 106 70 5 48 56 0 108 71 0 50 56 5 110 71 5 52 57 0 112 72 0 54 57 5 114 72 5 56 58 0 115 72 8 58 58 5 Figure 5 1 Thermal Profile for Processors with PRB 1 75 0 70 0 y 0 25x 44 65 0 60 0 Tease C 55 0 50 0 45 0 Eil e F vY F v r n eg 0 10 20 30 40 50 60 70 80 90 100 110 Power W Table 5 3 T
59. ands of all processor FSB agents If INIT is sampled active on the active to inactive transition of RESET then the processor executes its Built in Self Test BIST ITP_CLK 1 0 Input ITP_CLK 1 0 are copies of BCLK that are used only in processor systems where no debug port is implemented on the system board ITP_CLK 1 0 are used as BCLK 1 0 references for a debug port implemented on an interposer If a debug port is implemented in the system ITP_CLK 1 0 are no connects in the system These are not processor signals LINT 1 0 Input LINT 1 0 Local APIC Interrupt must connect the appropriate pins lands of all APIC Bus agents When the APIC is disabled the LINTO signal becomes INTR a maskable interrupt request signal and LINT1 becomes NMI a nonmaskable interrupt INTR and NMI are backward compatible with the signals of those names on the Pentium processor Both signals are asynchronous Both of these signals must be software configured via BIOS programming of the APIC register space to be used either as NMI INTR or LINT 1 0 Because the APIC is enabled by default after Reset operation of these signals as LINT 1 0 is the default configuration LL_ID 1 0 Output The LL_ID 1 0 signals are used to select the correct loadline slope for the processor LL_ID 1 0 00 for the Pentium 4 processor in the 775 land package LOCK Input Output LOCK indicates to the system that a transaction must occu
60. as es OO00000000009000000000000000000090 000000000000000000000000000000000 ey 000000000000000090000000000 lez 252 E ES SS S E 28 5 gt i K co c Z S mm et a lt gt A EE 36 Datasheet In 3 1 2 3 1 3 Table 3 1 3 1 4 Table 3 2 Datasheet Package Mechanical Specifications Processor Component Keep Out Zones The processor may contain components on the substrate that define component keep out zone requirements A thermal and mechanical solution design must not intrude into the required keep out zones Decoupling capacitors are typically mounted to either the topside or land side of the package substrate See Figure 3 2 and Figure 3 3 for keep out zones The location and quantity of package capacitors may change due to manufacturing efficiencies but will remain within the component keep in Package Loading Specifications Table 3 1 provides dynamic and static load specifications for the processor package These mechanical maximum load limits should not be exceeded during heatsink assembly shipping conditions or standard use condition Also any mechanical system or component testing should not exceed the maximum limits The processor package substrate should not be used as a mechanical reference or load bearing surface for thermal and mechanical solution The minimum loading specification must be maintained by any thermal and mechanical solutions Processo
61. ation recommendations refer to Section 2 9 COMP 1 0 Analog COMP 1 0 must be terminated to Vgg on the system board using precision resistors 65 Datasheet Land Listing and Signal Descriptions I n Table 4 3 Signal Description Sheet 1 of 9 Name Type Description D 63 0 Data are the data signals These signals provide a 64 bit data path between the processor FSB agents and must connect the appropriate pins lands on all such agents The data driver asserts DRDY to indicate a valid data transfer D 63 0 are quad pumped signals and will thus be driven four times in a common clock period D 63 0 are latched off the falling edge of both DSTBP 3 0 and DSTBN 3 0 Each group of 16 data signals correspond to a pair of one DSTBP and one DSTBN The following table shows the grouping of data signals to data strobes and DBI Quad Pumped Signal Groups DSTBN Input Data Group DSTBP DBI D 63 0 Output D 15 0 0 0 D 31 16 1 1 D 47 32 2 2 D 63 48 3 3 Furthermore the DBI signals determine the polarity of the data signals Each group of 16 data signals corresponds to one DBI signal When the DBI signal is active the corresponding data group is inverted and therefore sampled active high DBI 3 0 Data Bus Inversion are source synchronous and indicate the polarity of the D 63 0 signals The DBI 3 0 signals are activated when the data on the data bus is inverted I
62. cal than with previous processor families The GTL inputs require a reference voltage GILREF that is used by the receivers to determine if a signal is a logical O or a logical 1 GTLREF must be generated on the system board see Table 2 18 for GTLREF specifications Termination resistors are provided on the processor silicon and are terminated to Nat Intel chipsets will also provide on die termination thus eliminating the need to terminate the bus on the system board for most GTL signals Some GIL signals do not include on die termination and must be terminated on the system board See Table 2 4 for details regarding these signals The GTL bus depends on incident wave switching Therefore timing calculations for GTL signals are based on flight time as opposed to capacitive deratings Analog signal simulation of the FSB including trace lengths is highly recommended when designing a system Power and Ground Lands For clean on chip power distribution the Pentium 4 processor in the 775 land package has 226 Vcc power 24 V rr and 273 Vss ground lands All power lands must be connected to Vcc all V rr lands must be connected to Vyr while all Vss lands must be connected to a system ground plane The processor Vcc lands must be supplied the voltage determined by the Voltage IDentification VID signals Decoupling Guidelines Due to its large number of transistors and high internal clock speeds the processor is capable of genera
63. ce Synch Input Output D4 A5 Source Synch Input Output A24 AB5 Source Synch Input Output D5 B6 Source Synch Input Output A25 AC5 Source Synch Input Output D6 B7 Source Synch Input Output A26 AB4 Source Synch Input Output D7 A7 Source Synch Input Output A27 AF5 Source Synch Input Output D8 A10 Source Synch Input Output A28 AF4 Source Synch Input Output D9 A11 Source Synch Input Output A29 AG6 Source Synch Input Output D10 B10 Source Synch Input Output A30 AG4 Source Synch Input Output D11 C11 Source Synch Input Output A31 AG5 Source Synch Input Output D12 D8 Source Synch Input Output A32 AH4 Source Synch Input Output D13 B12 Source Synch Input Output A33 AH5 Source Synch Input Output D14 C12 Source Synch Input Output A34 AJ5 Source Synch Input Output D15 D11 Source Synch Input Output A35 AJ6 Source Synch Input Output D16 G9 Source Synch Input Output ADS D2 Common Clock Input Output D17 F8 Source Synch Input Output ADSTBO R6 Source Synch Input Output D18 F9 Source Synch Input Output ADSTB1 AD5 Source Synch Input Output D19 E9 Source Synch Input Output APO U2 Common Clock Input Output D20 D7 Source Synch Input Output AP1 U3 Common Clock Input Output D21 E10 Source Synch Input Output BCLKO F28 Clock Input D22 D10 Source Synch Input Output Datasheet
64. ceive power from the FSB these signals should not be driven allowing the level to return to V for minimum power drawn by the termination resistors in this state In addition all other input signals on the FSB should be driven to the inactive state BINIT will not be serviced while the processor is in Stop Grant state The event will be latched and can be serviced by software upon exit from the Stop Grant state RESET will cause the processor to immediately initialize itself but the processor will stay in Stop Grant state A transition back to the Normal state will occur with the de assertion of the STPCLK signal A transition to the HALT Grant Snoop state will occur when the processor detects a snoop on the FSB see Section 6 2 4 While in the Stop Grant State SMI INIT BINIT and LINT 1 0 will be latched by the processor and only serviced when the processor returns to the Normal State Only one occurrence of each event will be recognized upon return to the Normal state While in Stop Grant state the processor will process a FSB snoop 85 Features 6 2 4 6 2 4 1 6 2 4 2 86 intel Enhanced HALT Snoop or HALT Snoop State Grant Snoop State The Enhanced HALT Snoop State is used in conjunction with the new Enhanced HALT state If Enhanced HALT state is not enabled in the BIOS the default Snoop State entered will be the HALT Snoop State Refer to the sections below for details on HALT Snoop State Grant Snoo
65. chronous UO Synchronous to assoc strobe Signals REQ 4 0 A 16 3 4 A 35 17 D 15 0 DBI0 D 31 16 DBI1 D 47 32 DBI2 D 63 48 DBIS Associated Strobe ADSTBO ADSTB1 DSTBP0 DSTBNO DSTBP1 DSTBN1 DSTBP2 DSTBN2 DSTBP3 DSTBN3 GTL Strobes Synchronous to ADSTB 1 0 DSTBP 3 0 DSTBN 3 0 BCLK 1 0 A20M IGNNE INIT LINTO INTR LINT1 NMI SMI GTL Asynchronous Input STPCLK GTL Asynchronous Output FERR PBE IERR THERMTRIP GTL Asynchronous Input Output PROCHOT TAP Input Synchronous to TCK TCK TDI TMS TRST TAP Output Synchronous to TCK TDO FSB Clock Clock BCLK 1 0 ITP_CLK 1 0 2 VCC VTT VCCA VCCIOPLL VID 5 0 VSS VSSA GTLREF COMP 1 0 RESERVED TESTHI 13 0 THERMDA THERMDC VCC_SENSE VSS_SENSE BSEL 2 0 Power Other SKTOCC DBR VTTPWRGD BOOTSELECT PWRGOOD VTT_OUT_LEFT VTT OUT RIGHT VTT_SEL LL ID 1 0 FCx VSS MB REGULATION VCC_MB_REGULATION MSID 1 0 Datasheet 19 Electrical Specifications NOTES 1 Refer to Section 4 2 for signal descriptions Intel 2 In processor systems where there is no debug port implemented on the system board these signals are used to support a debug port interposer In systems with the debug port implemented on the system board these signals are no connects 3 The value of these signals during the active to inactive edge of RESET defines the processor configuration
66. ct to the appropriate pins lands of all processor FSB agents A correct parity signal is high if an even number of covered signals are low and low if an odd number of covered signals are low While RS 2 0 000 RSP is also high since this indicates it is not being driven by any agent guaranteeing correct parity SKTOCC Output SKTOCC Socket Occupied will be pulled to ground by the processor System board designers may use this signal to determine if the processor is present SMI Input SMI System Management Interrupt is asserted asynchronously by system logic On accepting a System Management Interrupt the processor saves the current state and enter System Management Mode SMM An SMI Acknowledge transaction is issued and the processor begins program execution from the SMM handler If SMI is asserted during the de assertion of RESET the processor will tri state its outputs Datasheet Land Listing and Signal Descriptions 70 Intel Table 4 3 Signal Description Sheet 1 of 9 Name Type Description STPCLK Input STPCLK Stop Clock when asserted causes the processor to enter a low power Stop Grant state The processor issues a Stop Grant Acknowledge transaction and stops providing internal clock signals to all processor core units except the FSB and APIC units The processor continues to snoop bus transactions and service interrupts while in Stop Grant state W
67. ddress Parity are driven by the request initiator along with ADS A 35 3 and the transaction type on the REQ 4 0 A correct parity signal is high if an even number of covered signals are low and low if an odd number of covered signals are low This allows parity to be high when all the covered signals are high AP 1 0 should connect the appropriate pins lands of all processor FSB agents The following table defines the coverage model of these signals Request Signals Subphase 1 Subphase 2 A 35 24 APO AP1 A 23 3 AP1 AP0 REQ 4 0 AP1 APO BCLK 1 0 Input The differential pair BCLK Bus Clock determines the FSB frequency All processor FSB agents must receive these signals to drive their outputs and latch their inputs All external timing parameters are specified with respect to the rising edge of BCLKO crossing Vcnoss Datasheet Land Listing and Signal Descriptions Intel Table 4 3 Signal Description Sheet 1 of 9 Name Type Description BINIT Input Output BINIT Bus Initialization may be observed and driven by all processor FSB agents and if used must connect the appropriate pins lands of all such agents Ifthe BINIT driver is enabled during power on configuration BINIT is asserted to signal any bus condition that prevents reliable future operation If BINIT observation is enabled during power on configuration and BINIT is sampled asserted symmetric agents
68. designed for 775_VR_CONFIG_04B processors The power and Icc will be incrementally higher in this configuration due to the improved loadline and resulting higher Vcc 9 lec max iS specified at Voc max 10 The current specified is also for AutoHALT State 11 Icc Stop Grant are specified at Voc max 12 The maximum instantaneous current the processor will draw while the thermal control circuit is active as in dicated by the assertion of PROCHOT is the same as the maximum Icc for the processor 13 Ver must be provided via a separate voltage source and not be connected to Vcc This specification is mea sured at the land 14 Baseboard bandwidth is limited to 20 MHz 15 These parameters are based on design characterization and are not tested 16 This is maximum total current drawn from Vrr plane by only the processor This specification does not in clude the current coming from Rrr through the signal line Refer to the Voltage Regulator Down VRD 10 1 Design Guide For Desktop LGA775 Socket to determine the total ker drawn by the system Table 2 9 Vcc Static and Transient Tolerance for 775_VR_CONFIG_04A Processors Voltage Deviation from VID Setting V 1 3 iad Maximum Voltage Typical Voltage Minimum Voltage 1 70 mQ 1 75 mQ 1 80 mQ 0 0 000 0 025 0 050 5 0 009 0 034 0 059 10 0 017 0 043 0 068 15 0 026 0 051 0 077 20 0 034 0 060 0 086 25 0 043
69. document to identify processor lands Figure 3 6 Processor Land Coordinates Top View Veo Vss 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14131211109 8 7 6 5 4 3 2 1 Clock Async Address Common 23242194 UQRL2Z gt z 2 gt gt rrcoz x gt IOLuWuoon lt arr 000000000000000000000000000 ooo N 000000000000000000000000000000000 000000000000000000000000000000000 r 0000000000000000000000000000000G 0 9000000000000000000000000000000 0 2202 22 2020202 20 2022020 2022002002N0008000 0000 000000000000000000 OOOO 20000000000000000000000000 R000000 000000000 ocooooooo 2000000000 000000000 9000000000 ocooooooo 000000000 i5 000000000 000000000 oclooooooo 2000000000 KS 5 000000000 2000000000 sis Oclooooooo 2000000000 x S 000000000 000000000 S 3 9 O0d0000000 2900000000 oO 000000000 2000000000 000000000 000000000 000000000 2000000000 000000000 000000000 00999990 0000000000000000000000000003900000 T 20000000000000000000000000Ap000000 000000000000000000000000000000000 20000000000000000000000000do0000000 000000000000000000000000000000000 200000000000000000000000000d0000000 000000000000000000000000000000000 20000000000000000000000000dlo 0000 e ZE3 324 27 Q4Y222L3 gt 2 gt gt 5rraozs gt ox gt TIOLWoon lt 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 131211109 8 7 6 5 4 3 2 1 V Clocks Data 39 Datasheet Package Mechanical Specifications 40
70. e 3 1 Processor Package Assembly Sketch 3 1 1 Note Datasheet ms Core die TM Substrate Q Capacitors ie i LGA775 Socket NOTE 1 Socket and motherboard are included for reference and are not part of processor package System Board Package Mechanical Drawing The package mechanical drawings are shown in Figure 3 2 and Figure 3 4 The drawings include dimensions necessary to design a thermal solution for the processor These dimensions include Package reference with tolerances total height length width etc IHS parallelism and tilt Land dimensions Top side and back side component keep out dimensions Reference datums All drawing dimensions are in mm in Guidelines on potential IHS flatness variation with socket load plate actuation and installation of the cooling solution is available in the processor Thermal Mechanical Design Guidelines 33 Package Mechanical Specifications Figure 3 2 Processor Package Drawing 1 JO L33HS 9NIAVSO F1VOS LON 00 REES H 90 9425 A38 YIOMAN_ONLAVIA 5 3009 39v5 3zis auil 6118 ZS0S6 V vg VLNWS 61185 X08 O d V A 18 3931109 NOISSIM 0022 EM o S IN3NLUV 430 IHSINIA 1 lY1831VN BO aiva Ag Q3A08d4V N OI LDIPOYA 319NV GYIHL 3iva Ag 0349343 2100 Ag NAVEG 3iva Ag 3N91S30 SOF reif be UD CEE TIN SI W PIA 3MSY HL
71. e interface between the processor and system core logic a k a the chipset components The FSB is a multiprocessing interface to processors memory and I O Processor Packaging Terminology Commonly used terms are explained here for clarification Pentium 4 processor on 90 nm process in the 775 land package Processor in the FC LGA4 package with a 1 MB L2 cache Processor For this document the term processor is the generic form of the Pentium 4 processor in the 775 land package Keep out zone The area on or near the processor that system design can not use Processor core Processor core die with integrated L2 cache FC LGA4 package The Pentium 4 processor in the 775 land package is available in a Flip Chip Land Grid Array 4 package consisting of a processor core mounted on a substrate with an integrated heat spreader IHS e LGA775 socket The Pentium 4 processor in the 775 land package mates with the system board through a surface mount 775 land LGA socket Integrated heat spreader IHS A component of the processor package used to enhance the thermal performance of the package Component thermal solutions interface with the processor at the IHS surface Retention mechanism RM Since the LGA775 socket does not include any mechanical features for heatsink attach a retention mechanism is required Component thermal solutions should attach to the processor via a retention mechanism
72. e power Vcc It can be used to sense or measure voltage near the silicon with little noise VCC_MB_ REGULATION Output This land is provided as a voltage regulator feedback sense point for Vcc It is connected internally in the processor package to the sense point land U27 as described in the Voltage Regulator Down VRD 10 1 Design Guide for Desktop Socket 775 Datasheet Land Listing and Signal Descriptions 71 Intel Table 4 3 Signal Description Sheet 1 of 9 Name Type Description VID 5 0 Output VID 5 0 Voltage ID signals are used to support automatic selection of power supply voltages Vcc These are open drain signals that are driven by the processor and must be pulled up on the motherboard Refer to the Voltage Regulator Down VRD 10 1 Design Guide for Desktop Socket 775 for more information The voltage supply for these signals must be valid before the VR can supply Vcc to the processor Conversely the VR output must be disabled until the voltage supply for the VID signals becomes valid The VID signals are needed to support the processor voltage specification variations See Table 2 2 for definitions of these signals The VR must supply the voltage that is requested by the signals or disable itself VSS Input VSS are the ground pins for the processor and should be connected to the system ground plane VSSA Input VSSA is the isolated ground for internal PL
73. eatsink Power Cable Connector Description 90 7 6 Baseboard Power Header Placement Relative to Processor Socket 91 7 7 Boxed Processor Fan Heatsink Airspace Keepout Requirements Top View 92 7 8 Boxed Processor Fan Heatsink Airspace Keepout Requirements Side View 92 7 9 Boxed Processor Fan Heatsink Set Points aa 93 Datasheet 5 Contents I ntel E Tables UE We 11 2 1 Core Frequency to FSB Multiplier Configuration I 14 2 2 Voltage Identification DefinitiON s sssrinin aa aaa KA 16 2 3 PSB Sigal Groups mm mmmmmmmmmmmmmrmmmm mmm m mmmm mmmmmrmm mmmmmrmrmmmmmmmmmmmmmmmmmmmmikmaHHH rinn 19 2 4 Signal Characteristics cms aai aaa a Aita 20 2 5 Signal Reference Voltages n 20 2 6 BSEL 2 0 Frequency Table for BCLK 1 0 conca cnn rra 21 2 7 Processor DC Absolute Maximum Ratings nan c cnn naar rra 22 2 8 Voltage and Current Specifications U a 23 2 9 VCC Static and Transient Tolerance for 775_VR_CONFIG_04A Processors 24 2 10VCC Static and Transient Tolerance for 775_VR_CONFIG_04B Processors 25 2 11 GTL Asynchronous Signal Group DC Specifications 27 2 14VTTPWRGD DC Specifieall nS AA 28 2 12GTL Signal Group DC Specifica
74. er Other P29 VSS Power Other U8 VCC Power Other P30 VSS Power Other U23 VCC Power Other R1 FC2 Power Other Input U24 VCC Power Other R2 VSS Power Other U25 VCC Power Other R3 FERR PBE Asynch GTL Output U26 VCC Power Other R4 A8 Source Synch Input Output U27 VCC Power Other R5 VSS Power Other U28 VCC Power Other R6 ADSTB0 Source Synch Input Output U29 VCC Power Other R7 vss Power Other U30 VCC Power Other R8 VCG Power Other V1 MSID1 Power Other Output R23 VSS Power Other v2 LL_IDO Power Other Output R24 VSS Power Other V3 VSS Power Other R25 VSS Power Other V4 A15 Source Synch Input Output R26 VSS Power Other V5 A14 Source Synch Input Output R27 vss Power Other V VSS Power Other R28 VSS Power Other V7 VSS Power Other R29 VSS Power Other V VCC Power Other R30 VSS Power Other V23 VSS Power Other Tt COMP1 Power Other Input V24 VSS Power Other T2 FC4 Power Other Input V25 VSS Power Other T3 VSS Power Other V26 VSS Power Other T4 A11 Source Synch Input Output V27 VSS Power Other T5 A9 Source Synch Input Output V28 VSS Power Other T6 VSS Power Other V29 VSS Power Other T7 VSS Power Other V30 VSS Power Other T8 VCG Power Other W1 MSIDO Power Other Output T23 VCC Power Other W2 TESTHI12 Power Other Input Datasheet Datasheet Table 4 2 Numerical Land Assignment Land Listing and Signal Descriptions Table 4 2 Numerical Land Assignment
75. er Other VCC J13 Power Other VCC AL21 Power Other VCC J14 Power Other VCC AL22 Power Other VCC J15 Power Other VCC AL25 Power Other VCC J18 Power Other VCC AL26 Power Other VCC J19 Power Other VCC AL29 Power Other VCC J20 Power Other VCC AL30 Power Other VCC J21 Power Other VCC AL8 Power Other VCC J22 Power Other VCC AL9 Power Other VCC J23 Power Other VCC AM11 Power Other VCC J24 Power Other VCC AM12 Power Other VCC J25 Power Other VCC AM14 Power Other VCC J26 Power Other VCC AM15 Power Other VCC J27 Power Other VCC AM18 Power Other VCC J28 Power Other VCC AM19 Power Other VCC J29 Power Other VCC AM21 Power Other VCC J30 Power Other VCC AM22 Power Other VCC J8 Power Other VCC AM25 Power Other VCC J9 Power Other VCC AM26 Power Other VCC K23 Power Other VCC AM29 Power Other VCC K24 Power Other VCC AM30 Power Other VCC K25 Power Other VCC AM8 Power Other VCC K26 Power Other VCC AM9 Power Other VCC K27 Power Other VCC AN11 Power Other VCC K28 Power Other Datasheet Datasheet Table 4 1 Alphabetical Land Assignments Land Listing and Signal Descriptions Table 4 1 Alphabetical Land Assignments Land Signal Buffer i i Land Signal Buffer i i Land Name D Type
76. f more than half the data bits within a 16 bit group would have been asserted electrically low the bus agent may invert the data bus signals for that particular sub phase for that 16 bit group DBI 3 0 Assignment To Data Bus Input DBI 3 0 Output Bus Signal Data Bus Signals DBI3 D 63 48 DBI2 D 47 32 DBH D 31 16 DBI0 D 15 0 DBR Debug Reset is used only in processor systems where no debug port is implemented on the system board DBR is used by a debug port interposer so DBR Output that an in target probe can drive system reset If a debug port is implemented in the system DBR is a no connect in the system DBR is not a processor signal DBSY Data Bus Busy is asserted by the agent responsible for driving data on Input the processor FSB to indicate that the data bus is in use The data bus is Output released after DBSY is de asserted This signal must connect the appropriate pins lands on all processor FSB agents DBSY DEFER is asserted by an agent to indicate that a transaction cannot be guaranteed in order completion Assertion of DEFER is normally the responsibility of the addressed memory or input output agent This signal must connect the appropriate pins lands of all processor FSB agents DEFER Input DP 3 0 Data parity provide parity protection for the D 63 0 signals They are driven by the agent responsible for driving D 63 0 and must connect the appropriate pi
77. file it is necessary to accurately measure processor power dissipation 73 LU Thermal Specifications and Design Considerations I ntel 74 The case temperature is defined at the geometric top center of the processor IHS Analysis indicates that real applications are unlikely to cause the processor to consume maximum power dissipation for sustained periods of time Intel recommends that complete thermal solution designs target the Thermal Design Power TDP indicated in Table 5 1 instead of the maximum processor power consumption The Thermal Monitor feature is intended to help protect the processor in the unlikely event that an application exceeds the TDP recommendation for a sustained period of time For more details on the usage of this feature refer to Section 5 2 In all cases the Thermal Monitor feature must be enabled for the processor to remain within specification Table 5 1 Processor Thermal Specifications Core ri a SE Tc Maximum Tc C Notes 3 20F PRB 0 84 5 See Table 5 3 and Figure 5 2 12 3 40F PRB 1 115 5 See Table 5 2 and Figure 5 1 LE 3 60F PRB 1 115 5 See Table 5 2 and Figure 5 1 Le 3 80F PRB 1 115 5 See Table 5 2 and Figure 5 1 t NOTES Thermal Design Power TDP should be used for processor thermal solution design targets The TDP is not the maximum power that the processor can dissipate 2 This table shows the maximum TDP for a given frequency range Individu
78. gnal PROCHOT processor hot is asserted when the processor die temperature has reached its maximum operating temperature If the Thermal Monitor is enabled note that the Thermal Monitor must be enabled for the processor to be operating within specification the TCC 79 LU Thermal Specifications and Design Considerations I ntel 5 2 5 5 2 6 80 will be active when PROCHOT is asserted The processor can be configured to generate an interrupt upon the assertion or de assertion of PROCHOT Refer to the Intel Architecture Software Developer s Manuals for specific register and programming details The Pentium 4 processor in the 775 land package implements a bi directional PROCHOT capability to allow system designs to protect various components from over temperature situations The PROCHOT signal is bi directional in that it can either signal when the processor has reached its maximum operating temperature or be driven from an external source to activate the TCC The ability to activate the TCC via PROCHOT can provide a means for thermal protection of system components One application is the thermal protection of voltage regulators VR System designers can create a circuit to monitor the VR temperature and activate the TCC when the temperature limit of the VR is reached By asserting PROCHOT pulled low and activating the TCC the VR can cool down as a result of reduced processor power consumption Bi directional PROCHOT can allo
79. he IHS in an axis of rotation normal to the IHS top surface 4 These guidelines are based on limited testing for design characterization 37 a Package Mechanical Specifications I ntel P 3 1 5 Package Insertion Specifications The Pentium 4 processor in the 775 land package can be inserted into and removed from a LGA775 socket 15 times The socket should meet the LGA775 requirements detailed in the LGA775 Socket Mechanical Design Guide 3 1 6 Processor Mass Specification The typical mass of the Pentium 4 processor in the 775 land package is 21 5 g 0 76 oz This mass weight includes all the components that are included in the package 3 1 7 Processor Materials Table 3 3 lists some of the package components and associated materials Table 3 3 Processor Materials Component Material Integrated Heat Spreader IHS Nickel Plated Copper Substrate Fiber Reinforced Resin Substrate Lands Gold Plated Copper 3 1 8 Processor Markings Figure 3 5 shows the topside markings on the processor These diagrams are to aid in the identification of the Pentium 4 processor in the 775 land package Figure 3 5 Processor Top Side Markings INTEL 04 Pentium 4 3 60GHZ 1M 800 04B Steesel FPO 38 Datasheet Package Mechanical Specifications Processor Land Coordinates 3 1 9 Figure 3 6 shows the top view of the processor land coordinates The coordinates are referred to throughout the
80. hen STPCLKH is de asserted the processor restarts its internal clock to all units and resumes execution The assertion of STPCLK has no effect on the bus clock STPCLK is an asynchronous input TCK Input TCK Test Clock provides the clock input for the processor Test Bus also known as the Test Access Port TDI Input TDI Test Data In transfers serial test data into the processor TDI provides the serial input needed for JTAG specification support TDO Output TDO Test Data Out transfers serial test data out of the processor TDO provides the serial output needed for JTAG specification support TESTHI 13 0 Input TESTHI 13 0 must be connected to the processor s appropriate power source refer to VTT OUT LEFT and VTT OUT RIGHT signal description through a resistor for proper processor operation See Section 2 5 for more details THERMDA Other Thermal Diode Anode See Section 5 2 7 THERMDC Other Thermal Diode Cathode See Section 5 2 7 THERMTRIP Output In the event of a catastrophic cooling failure the processor will automatically shut down when the silicon has reached a temperature approximately 20 C above the maximum Tc Assertion of THERMTRIP Thermal Trip indicates the processor junction temperature has reached a level beyond where permanent silicon damage may occur Upon assertion of THERMTRIP the processor will shut off its internal clocks thus halting
81. her VSS AG10 Power Other VSS AB29 Power Other VSS AG13 Power Other VSS AB30 Power Other VSS AG16 Power Other VSS AB7 Power Other VSS AG17 Power Other VSS AC3 Power Other VSS AG20 Power Other VSS AC6 Power Other VSS AG23 Power Other VSS AC7 Power Other VSS AG24 Power Other VSS AD4 Power Other VSS AG7 Power Other VSS AD7 Power Other VSS AH1 Power Other VSS AE10 Power Other VSS AH10 Power Other VSS AE13 Power Other VSS AH13 Power Other VSS AE16 Power Other VSS AH16 Power Other VSS AE17 Power Other VSS AH17 Power Other VSS AE2 Power Other VSS AH20 Power Other VSS AE20 Power Other VSS AH23 Power Other VSS AE24 Power Other VSS AH24 Power Other VSS AE25 Power Other VSS AH3 Power Other VSS AE26 Power Other VSS AH6 Power Other VSS AE27 Power Other VSS AH7 Power Other VSS AE28 Power Other VSS AJ10 Power Other VSS AE29 Power Other VSS AJ13 Power Other VSS AE30 Power Other VSS AJ16 Power Other VSS AE5 Power Other VSS AJ17 Power Other VSS AE7 Power Other VSS AJ20 Power Other Datasheet Datasheet Table 4 1 Alphabetical Land Assignments Land Listing and Signal Descriptions Table 4 1 Alphabetical Land Assignments Land Name kg k rap Direction Land Name san ek a Direction VSS AJ23 Power Other VSS AM24
82. hermal Profile for Processors with PRB 0 Sheet 1 of 2 Power W Maximum Tc C Power Maximum Tc C 0 44 2 44 56 5 2 44 8 46 57 1 Poca 453 48 57 6 Datasheet 75 Thermal Specifications and Design Considerations 76 Table 5 3 Thermal Profile for Processors with PRB 0 Sheet 2 of 2 Figure 5 2 Thermal Profile for Processors with PRB 0 Power W Maximum Tc C Power Maximum Tc C 6 45 9 50 58 2 8 46 4 52 58 8 10 47 0 54 59 3 12 47 6 56 59 9 14 48 1 58 60 4 16 48 7 60 61 0 18 49 2 62 61 6 20 49 8 64 62 1 22 50 4 66 62 7 24 50 9 68 63 2 26 51 5 70 63 8 28 52 0 72 64 4 30 52 6 74 64 9 32 53 2 76 65 5 34 53 7 78 66 0 36 54 3 80 66 6 38 54 8 82 67 2 40 55 4 84 67 7 42 56 0 Tcase C 70 0 65 0 60 0 y 0 28x 44 2 m EA o 50 0 45 0 40 0 20 30 40 Power W 50 60 70 80 Datasheet 5 1 2 Thermal Specifications and Design Considerations Thermal Metrology The maximum and minimum case temperatures Tc are specified in Table 5 1 These temperature specifications are meant to help ensure proper operation of the processor Figure 5 3 illustrates where Intel recommends Tc thermal measurements should be made For detailed guidelines on temperature measurement methodology refer to the Intel Pentium 4 Process
83. inactive transitions of the TCC when the processor temperature is near its maximum operating temperature Once the temperature has dropped below the maximum operating temperature and the hysteresis timer has expired the TCC goes inactive and clock modulation ceases 77 LU Thermal Specifications and Design Considerations I ntel 5 2 2 78 With a properly designed and characterized thermal solution it is anticipated that the TCC would only be activated for very short periods of time when running the most power intensive applications The processor performance impact due to these brief periods of TCC activation is expected to be so minor that it would be immeasurable An under designed thermal solution that is not able to prevent excessive activation of the TCC in the anticipated ambient environment may cause a noticeable performance loss and in some cases may result in a Tc that exceeds the specified maximum temperature and may affect the long term reliability of the processor In addition a thermal solution that is significantly under designed may not be capable of cooling the processor even when the TCC is active continuously Refer to the Intel Pentium 4 Processor on 90 nm Process in the 775 Land Package Thermal Design Guidelines for information on designing a thermal solution The duty cycle for the TCC when activated by the Thermal Monitor is factory configured and cannot be modified The Thermal Monitor does not require any add
84. itional hardware software drivers or interrupt handling routines Thermal Monitor 2 The Pentium 4 processor in the 775 land package also supports a power management capability known as Thermal Monitor 2 This mechanism provides an efficient mechanism for limiting the processor temperature by reducing power consumption within the processor When Thermal Monitor 2 is enabled and a high temperature situation is detected the enhanced Thermal Control Circuit TCC will be activated This enhanced TCC causes the processor to adjust its operating frequency bus multiplier and input voltage VID This combination of reduced frequency and VID results in a decrease in processor power consumption A processor enabled for Thermal Monitor 2 includes two operating points each consisting of a specific operating frequency and voltage The first point represents the normal operating conditions for the processor The second point consists of both a lower operating frequency and voltage When the enhanced TCC is activated the processor automatically transitions to the new frequency This transition occurs very rapidly on the order of 5 us During the frequency transition the processor is unable to service any bus requests and consequently all bus traffic is blocked Edge triggered interrupts will be latched and kept pending until the processor resumes operation at the new frequency Once the new operating frequency is engaged the processor will transi
85. l as the core frequency of the processor As in previous generation processors the Pentium 4 processor in the 775 land package core frequency is a multiple of the BCLK 1 0 frequency The processor bus ratio multiplier will be set at its default ratio during manufacturing No user intervention is necessary and the processor will automatically run at the speed indicated on the package The Pentium 4 processor in the 775 land package uses a differential clocking implementation For more information on the Pentium 4 processor in the 775 land package clocking refer to the CK410 CK410M Clock Synthesizer Driver Specification Table 2 1 Core Frequency to FSB Multiplier Configuration Multiplication of System Core Frequency Core Frequency Core Frequency to FSB 133 MHz BCLK 200 MHz BCLK Notes 2 Frequency 533 MHz FSB 800 MHz FSB 1 14 1 86 GHz 2 80 GHz 1 15 2 GHz 3 GHz 1 16 2 13 GHz 3 20 GHz 1 17 2 26 GHz 3 40 GHz 1 18 2 40 GHz 3 60 GHz 1 19 2 53 GHz 3 80 GHz 1 20 2 66 GHz 4 GHz 1 21 2 80 GHz RESERVED NOTES 1 Individual processors operate only at or below the rated frequency 2 Listed frequencies are not necessarily committed production frequencies Datasheet Datasheet Electrical Specifications Voltage Identification The VID specification for the Pentium 4 processor in the 775 land package is supported by the Voltage Regulator Down VRD 10 1 Design Guide For Desktop LGA775 Socket
86. les the processor to execute operating systems and applications written to take advantage of Intel EM64T Further details on the 64 bit extension architecture and programming model can be found in the Intel Extended Memory 64 Technology Software Developer Guide at http developer intel com technology 64bitextensions In this document the Pentium 4 processor on 90 nm process in the 775 land package is also referred to as the processor The Pentium 4 processor on 90 nm process in the 775 land package supports Hyper Threading Technology Hyper Threading Technology allows a single physical processor to function as two logical processors While some execution resources such as caches execution units and buses are shared each logical processor has its own architecture state with its own set of general purpose registers control registers to provide increased system responsiveness in multitasking environments and headroom for next generation multithreaded applications Intel recommends enabling Hyper Threading Technology with Microsoft Windows XP Professional or Windows XP Home and disabling Hyper Threading Technology via the BIOS for all previous versions of Windows operating systems For more information on Hyper Threading Technology see http www intel com info hyperthreading Refer to Section 6 1 for Hyper Threading Technology configuration details In addition to supporting all the existing Streaming SIMD Extensions 2 SSE2 there are 13
87. ll not affect the long term reliability of the device For functional operation refer to the processor case temperature specifications 4 This rating applies to the processor and does not include any tray or packaging Processor DC Specifications The processor DC specifications in this section are defined at the processor core silicon and not at the package lands unless noted otherwise See Chapter 4 for the signal definitions and signal assignments Most of the signals on the processor FSB are in the GTL signal group The DC specifications for these signals are listed in Table 2 12 Previously legacy signals and Test Access Port TAP signals to the processor used low voltage CMOS buffer types However these interfaces now follow DC specifications similar to GTL The DC specifications for these signal groups are listed in Table 2 11 and Table 2 13 Table 2 8 through Table 2 15 list the DC specifications for the Pentium 4 processor in the 775 land package and are valid only while meeting specifications for case temperature clock frequency and input voltages Care should be taken to read all notes associated with each parameter MSR_PLATFORM_BRYV bit 18 is a Platform Requirement Bit PRB that indicates that the processor has specific platform requirements Datasheet Electrical Specifications Table 2 8 Voltage and Current Specifications Symbol Parameter Min Ty
88. lter Requirements u 17 2 2 VCC Static and Transient Tolerance for 775_VR_CONFIG_O04A 25 2 3 VCC Static and Transient Tolerance for 775_VR_CONFIG_04B 27 2 4 VCC Overshoot Example Waveform n 30 3 1 Processor Package Assembly Sketch nn nano conan nn nnnncrnnn anar 33 3 2 Processor Package Drawing 1 ooooooooccccncnnoccccccnanoncnnnnnnnoncnnnnnnnnnnnncnnnnn EnA nn rr rra 945 Gan cha Eala sa Si AA 34 3 3 Processor Package Drawing 2 uuu la llar eiii A ESAERA 35 3 4 Processor Package Drawing 3 36 3 5 Processor Top Side Markings_ u uu uuu ai EES SSES EES 38 3 6 Processor Land Coordinates Top View 39 4 1 Landout Diagram Top View Left Side 42 4 2 Landout Diagram Top View Right del 43 5 1 Thermal Profile for Processors with PRB 1 1 u 75 5 2 Thermal Profile for Processors with PRB 0 76 5 3 Case Temperature TC Measurement Location 77 5 4 Thermal Monitor 2 Frequency and Voltage Ordering a 79 6 1 Processor Low Power State Machine 85 7 1 Mechanical Representation of the Boxed PDrocesenr see 87 7 2 Space Requirements for the Boxed Processor Side View 88 7 3 Space Requirements for the Boxed Processor Top View 88 7 4 Space Requirements for the Boxed Processor Overall View 89 7 5 Boxed Processor Fan H
89. m designer to calculate the minimum and maximum values across the range of Vrr 3 GTLREF should be generated from Ver by a voltage divider of 1 resistors or 1 matched resistors 4 The V referred to in these specifications is the instantaneous Var 5 These pull ups are to VrTr 6 Ry is the on die termination resistance measured at V77 2 of the GTL output driver 7 COMP resistance must be provided on the system board with 1 resistors COMP 1 0 resistors are to Vss 31 Electrical Specifications 32 Datasheet 3 1 Package Mechanical Specifications Package Mechanical Specifications Package Mechanical Specifications The Pentium 4 processor in the 773 land package is packaged in a Flip Chip Land Grid Array FC LGA4 package that interfaces with the motherboard via an LGA775 socket The package consists of a processor core mounted on a substrate land carrier An integrated heat spreader IHS is attached to the package substrate and core and serves as the mating surface for processor component thermal solutions such as a heatsink Figure 3 1 shows a sketch of the processor package components and how they are assembled together Refer to the LGA775 Socket Mechanical Design Guide for complete details on the LGA775 socket The package components shown in Figure 3 1 include the following Integrated Heat Spreader IHS Thermal Interface Material TIM Processor core die Package substrate Capacitors Figur
90. mand Mode A 79 5 24 PROCHOT SIG MALL pees riensi nne kee Aleng e Reese D er ge huahua 79 5 2 5 THERMTRIP Giona 80 5 2 6 Teontro and Fan Speed Reduction U 80 S27 Thermal Diode u Oe 81 6 Features ti A ee Ae SA Ae ee ee uyu DQ 83 6 1 Power On Configuration Options I 83 6 2 Clock Control and Low Power States I 83 6 2 1 Normal State coito 83 6 2 2 HALT and Enhanced HALT Powerdown States eeeeseeeeeeeeeeeeenenennesrrresrrneene 84 6 2 3 Stop Grant State itis ie ni ata an eines di idad 86 6 2 4 Enhanced HALT Snoop or HALT Snoop State Grant Snoop State 86 7 Boxed Processor Specifications L 87 7 1 Mechanical Sp8 CifiCatioriStu suu u u uuu iii alte 88 7 1 1 Boxed Processor Cooling Solution Dimensions eeseeeeeeeesreennheehreehreehrresshssnHH 88 7 1 2 Boxed Processor Fan Heatsink Weight 89 7 1 3 Boxed Processor Retention Mechanism and Heatsink Attach Clip ASSOMBIY ucraniana Eege ees 89 7 2 Electrical Requirement erari R EEA A A R 89 7 2 1 Fan Heatsink Power Gupphy cc nn non c cnn cnn narrar 89 7 3 Thermal Specifications crac rara 91 7 3 1 Boxed Processor Cooling Heouiremerts 91 7 3 2 Variable Speed Fan 93 4 Datasheet ntel P Contents Figures 2 1 Phase Lock Loop PLL Fi
91. mation 2 7 GTL Asynchronous Signals Legacy input signals such as A20M IGNNE INIT SMI and STPCLK use CMOS input buffers All of these signals follow the same DC requirements as GTL signals however the outputs are not actively driven high during a logical O to 1 transition by the processor These signals do not have setup or hold time specifications in relation to BCLK 1 0 All of the GTL Asynchronous signals are required to be asserted deasserted for at least six BCLKs in order for the processor to recognize the proper signal state See Section 6 2 for additional timing requirements for entering and leaving the low power states 20 Datasheet 2 9 Electrical Specifications Test Access Port TAP Connection Due to the voltage levels supported by other components in the Test Access Port TAP logic it is recommended that the Pentium 4 processor in the 775 land package be first in the TAP chain and followed by any other components within the system A translation buffer should be used to connect to the rest of the chain unless one of the other components is capable of accepting an input of the appropriate voltage level Similar considerations must be made for TCK TMS TRST TDI and TDO Two copies of each signal may be required with each driving a different voltage level FSB Frequency Select Signals BSEL 2 0 The BSEL 2 0 signals are used to select the frequency of the processor input clock BCLK 1 0 Table
92. must meet the specifications in Table 2 17 when measured across the VCC_SENSE and VSS_SENSE lands Overshoot events that are lt 10 ns in duration may be ignored These measurements of processor die level overshoot should be taken with a 100 MHz bandwidth limited oscilloscope Refer to the Voltage Regulator Down VRD 10 1 Design Guide For Desktop LGA775 Socket for additional voltage regulator validation details GTL FSB Specifications Termination resistors are not required for most GTL signals as these are integrated into the processor silicon Valid high and low levels are determined by the input buffers which compare a signal s voltage with a reference voltage called GTLREF Table 2 18 lists the GTLREF specifications The GTL reference voltage GTLREF should be generated on the system board using high precision voltage divider circuits Datasheet Table 2 18 GTL Bus Voltage Definitions Datasheet Electrical Specifications Symbol Parameter Min Typ Max Units Notes GTLREF Bus heiergnce 0 98 0 67 Men 0 67 Vrr 02 0 67 Vr V 234 Voltage On die pullup for Rbuius BOOTSELECT 500 5000 Q S signal R Termination 54 60 66 o 6 H Resistance COMP 1 0 COMP Resistance 59 8 60 4 61 Q 7 NOTES 13 Unless otherwise noted all specifications in this table apply to all processor frequencies 2 The tolerances for this specification have been stated generically to enable the syste
93. n Typ Max Unit Notes Vi Input Low Voltage 0 24 V Vu Input High Voltage 0 96 V NOTES 1 These parameters are not tested and are based on design simulations 2 12 Vcc Overshoot Specification The Pentium 4 processor in the 775 land package can tolerate short transient overshoot events where Vcc exceeds the VID voltage when transitioning from a high to low current load condition This overshoot cannot exceed VID Vos max Vos max is the maximum allowable overshoot voltage The time duration of the overshoot event must not exceed Tos max Tos max is the maximum allowable time duration above VID These specifications apply to the processor die voltage as measured across the VCC_SENSE and VSS_SENSE lands Table 2 17 Vcc Overshoot Specifications Symbol Parameter Min Typ Max Unit Figure Magnitude of Vcc gt Vos_max overshoot above VID SES M ES Time duration of Voc lt St E Joe wn overshoot above VID 25 ns PS Datasheet 29 Electrical Specifications I ntel E Figure 2 4 Vcc Overshoot Example Waveform 2 12 1 2 13 30 Example Overshoot Waveform VID 0 050 Voltage V Time Tos Overshoot time above VID Vos Overshoot above VID NOTES 1 Vog is measured overshoot voltage 2 Tog is measured time duration above VID Die Voltage Validation Overshoot events from application testing on real processors
94. n tying any signal to power or ground a resistor will also allow for system testability For unused GTL input or I O signals use pull up resistors of the same value as the on die termination resistors Rrr Refer to Table 2 18 for more details TAP GTL Asynchronous inputs and GTL Asynchronous outputs do not include on die termination Inputs and used outputs must be terminated on the system board Unused outputs may be terminated on the system board or left unconnected Note that leaving unused outputs unterminated may interfere with some TAP functions complicate debug probing and prevent boundary scan testing FCx signals are signals that are available for compatibility with other processors The TESTHI signals must be tied to the processor V rr using a matched resistor where a matched resistor has a resistance value within 20 of the impedance of the board transmission line traces For example if the trace impedance is 60 then a value between 48 Q and 72 Q is required The TESTHI signals may use individual pull up resistors or be grouped together as detailed below A matched resistor must be used for each group TESTHI 1 0 TESTHI 7 2 e TESTHIS cannot be grouped with other TESTHI signals TESTHI9 cannot be grouped with other TESTHI signals TESTHIIO cannot be grouped with other TESTHI signals TESTHI11 cannot be grouped with other TESTHI signals TESTHI12 cannot be grouped with other TEST
95. nds Voltage regulation feedback for voltage regulator circuits must be taken from processor Vcc and Vgg lands Refer to the Voltage Regulator Down VRD 10 1 Design Guide For Desktop LGA775 Socket for socket loadline guidelines and VR implementation details Table 2 10 Vcc Static and Transient Tolerance for 775_VR_CONFIG_04B Processors Sheet 1 of 2 Voltage Deviation from VID Setting V 1 2 3 ee a Maximum Voltage Typical Voltage Minimum Voltage 1 30 ma 1 35 ma 1 40 ma 0 0 000 0 019 0 038 5 0 007 0 026 0 045 10 0 013 0 033 0 052 15 0 020 0 039 0 059 20 0 026 0 046 0 066 25 0 033 0 053 0 073 30 0 039 0 060 0 080 35 0 046 0 066 0 087 40 0 052 0 073 0 094 Datasheet 25 Electrical Specifications 26 intel Table 2 10 Vcc Static and Transient Tolerance for 775_VR_CONFIG_04B Processors Sheet 2 of 2 Voltage Deviation from VID Setting V 1 2 3 L Maximum Voltage Typical Voltage Minimum Voltage 1 30 mO 1 35 mO 1 40 mO 45 0 059 0 080 0 101 50 0 065 0 087 0 108 55 0 072 0 093 0 115 60 0 078 0 100 0 122 65 0 085 0 107 0 129 70 0 091 0 114 0 136 75 0 098 0 120 0 143 80 0 104 0 127 0 150 85 0 111 0 134 0 157 90 0 117 0 141 0 164 95 0 124 0 147 0 171 100 0 130 0 154 0 178 105 0 137 0 161 0 185 110 0 143 0 168 0 192 115 0 150 0 174 0 199 119
96. non executable If code attempts to run in non executable memory the processor raises an error to the operating system This feature can prevent some classes of viruses or worms that exploit buffer overrun vulnerabilities and can thus help improve the overall security of the system See the Intel Architecture Software Developer s Manual for more detailed information Intel will enable support components for the processor including heatsink heatsink retention mechanism and socket Manufacturability is a high priority hence mechanical assembly may be completed from the top of the baseboard and should not require any special tooling The processor includes an address bus powerdown capability that removes power from the address and data pins when the FSB is not in use This feature is always enabled on the processor Terminology A PF symbol after a signal name refers to an active low signal indicating a signal is in the active state when driven to a low level For example when RESET is low a reset has been requested Conversely when NMI is high a nonmaskable interrupt has occurred In the case of signals where the name does not imply an active state but describes part of a binary sequence such as address or data the symbol implies that the signal is inverted For example D 3 0 HLHL refers to a hex A and D 3 0 LHLH also refers to a hex A H High logic level L Low logic level FSB refers to th
97. ns lands of all processor FSB agents They are asserted by the current bus owner to define the currently active transaction type These signals are source synchronous to ADSTBO Refer to the AP 1 0 signal description for a details on parity checking of these signals RESET Input Asserting the RESET signal resets the processor to a known state and invalidates its internal caches without writing back any of their contents For a power on Reset RESET must stay active for at least one millisecond after Vcc and BCLK have reached their proper specifications On observing active RESET all FSB agents will de assert their outputs within two clocks RESET must not be kept asserted for more than 10 ms while PWRGOOD is asserted A number of bus signals are sampled at the active to inactive transition of RESET for power on configuration These configuration options are described in the Section 6 1 This signal does not have on die termination and must be terminated on the system board RS 2 0 Input RS 2 0 Response Status are driven by the response agent the agent responsible for completion of the current transaction and must connect the appropriate pins lands of all processor FSB agents RSP Input RSP Response Parity is driven by the response agent the agent responsible for completion of the current transaction during assertion of RS 2 0 the signals for which RSP provides parity protection It must conne
98. ns lands of all processor FSB agents Input DP 3 0 Output 66 Datasheet Land Listing and Signal Descriptions 67 Intel Table 4 3 Signal Description Sheet 1 of 9 Name Type Description DRDY Input Output DRDY Data Ready is asserted by the data driver on each data transfer indicating valid data on the data bus In a multi common clock data transfer DRDY may be de asserted to insert idle clocks This signal must connect the appropriate pins lands of all processor FSB agents DSTBN 3 0 DSTBP 3 0 Input Output Input Output DSTBN 3 0 are the data strobes used to latch in D 63 0 Signals Associated Strobe D 15 0 DBIO DSTBNO D 31 16 DBI1 DSTBN1 D 47 32 DBl2 DSTBN2 D 63 48 DBI3 DSTBN3 DSTBP 3 0 4 are the data strobes used to latch in D 63 0 Signals Associated Strobe D 15 0 DBIO DSTBPO D 31 16 DBI1 DSTBP1 D 47 32 DBI2H DSTBP2 D 63 48 DBIS DSTBP3 FCx Other FC signals are signals that are available for compatibility with other processors FERR PBE Output FERR PBE floating point error pending break event is a multiplexed signal and its meaning is qualified by STPCLK When STPCLKH is not asserted FERR PBE indicates a floating point error and will be asserted when the processor detects an unmasked floating point error When STPCLK is not asserted FERR PBE is similar to the ERROR signal on
99. o an offset register in the remote diode thermal sensors as exemplified by the equation Terror Rr N 1 IFwminl nk q In N where Terror sensor temperature error N sensor current ratio k Boltzmann Constant q electronic charge Thermal Diode Interface Signal Name Land Number Signal Description THERMDA AL1 diode anode THERMDC AK1 diode cathode 81 Thermal Specifications and Design Considerations 82 Datasheet 6 1 Table 6 1 6 2 6 2 1 Datasheet Features Features Power On Configuration Options Several configuration options can be configured by hardware The Pentium 4 processor in the 775 land package samples the hardware configuration at reset on the active to inactive transition of RESET For specifications on these options refer to Table 6 1 The sampled information configures the processor for subsequent operation These configuration options cannot be changed except by another reset All resets reconfigure the processor for reset purposes the processor does not distinguish between a warm reset and a power on reset Frequency determination functionality will exist on engineering sample processors which means that samples can run at varied frequencies Production material will have the bus to core ratio locked and can only be operated at the rated frequency Power On Configuration Option Signals Configuration Option Sign
100. on VCC AC26 Power Other VCC AG19 Power Other VCC AC27 Power Other VCC AG21 Power Other VCC AC28 Power Other VCC AG22 Power Other VCC AC29 Power Other VCC AG25 Power Other VCC AC30 Power Other VCC AG26 Power Other VCC AC8 Power Other VCC AG27 Power Other VCC AD23 Power Other VCC AG28 Power Other VCC AD24 Power Other VCC AG29 Power Other VCC AD25 Power Other VCC AG30 Power Other VCC AD26 Power Other VCC AG8 Power Other VCC AD27 Power Other VCC AG9 Power Other VCC AD28 Power Other VCC AH11 Power Other VCC AD29 Power Other VCC AH12 Power Other VCC AD30 Power Other VCC AH14 Power Other VCC AD8 Power Other VCC AH15 Power Other VCC AE11 Power Other VCC AH18 Power Other VCC AE12 Power Other VCC AH19 Power Other VCC AE14 Power Other VCC AH21 Power Other VCC AE15 Power Other VCC AH22 Power Other VCC AE18 Power Other VCC AH25 Power Other VCC AE19 Power Other VCC AH26 Power Other VCC AE21 Power Other VCC AH27 Power Other VCC AE22 Power Other VCC AH28 Power Other VCC AE23 Power Other VCC AH29 Power Other VCC AE9 Power Other VCC AH30 Power Other VCC AF11 Power Other VCC AH8 Power Other VCC AF12 Power Other VCC AH9 Power Other VCC AF14 Power Other VCC AJ11 Power Other VCC AF15 Power Other VCC AJ12 Power Other VCC AF18 Power Other VCC AJ14 Power Other VCC AF19 Power Other VCC AJ15 Power Other VCC AF21 Power Other VCC AJ18 Power Other
101. optionally be converted to an external error signal e g NMI by system core logic The processor will keep IERR asserted until the assertion of RESET This signal does not have on die termination Refer to Section 2 5 for termination requirements Datasheet Land Listing and Signal Descriptions Intel Table 4 3 Signal Description Sheet 1 of 9 Name Type Description IGNNE Input IGNNE Ignore Numeric Error is asserted to force the processor to ignore a numeric error and continue to execute noncontrol floating point instructions If IGNNE is de asserted the processor generates an exception on a noncontrol floating point instruction if a previous floating point instruction caused an error IGNNE has no effect when the NE bit in control register 0 CRO is set IGNNE is an asynchronous signal However to ensure recognition of this signal following an Input Output write instruction it must be valid along with the TRDY assertion of the corresponding Input Output Write bus transaction INIT Input INIT Initialization when asserted resets integer registers inside the processor without affecting its internal caches or floating point registers The processor then begins execution at the power on Reset vector configured during power on configuration The processor continues to handle snoop requests during INIT assertion INIT is an asynchronous signal and must connect the appropriate pins l
102. or on 90 nm Process in the 775 Land Package Thermal Design Guidelines Figure 5 3 Case Temperature Tc Measurement Location 5 2 5 2 1 Datasheet Measure Tc at this point geometric center of the package 37 5 mm Processor Thermal Features Thermal Monitor The Thermal Monitor feature helps control the processor temperature by activating the TCC when the processor silicon reaches its maximum operating temperature The TCC reduces processor power consumption as needed by modulating starting and stopping the internal processor core clocks The Thermal Monitor feature must be enabled for the processor to be operating within specifications The temperature at which Thermal Monitor activates the thermal control circuit is not user configurable and is not software visible Bus traffic is snooped in the normal manner and interrupt requests are latched and serviced during the time that the clocks are on while the TCC is active When the Thermal Monitor feature is enabled and a high temperature situation exists 1 e TCC is active the clocks will be modulated by alternately turning the clocks off and on at a duty cycle specific to the processor typically 30 50 Clocks often will not be off for more than 3 0 microseconds when the TCC is active Cycle times are processor speed dependent and will decrease as processor core frequencies increase A small amount of hysteresis has been included to prevent rapid active
103. p State and Enhanced HALT Snoop State HALT Snoop State Grant Snoop State The processor will respond to snoop transactions on the FSB while in Stop Grant state or in HALT Power Down state During a snoop transaction the processor enters the HALT Grant Snoop state The processor will stay in this state until the snoop on the FSB has been serviced whether by the processor or another agent on the FSB After the snoop is serviced the processor will return to the Stop Grant state or HALT Power Down state as appropriate Enhanced HALT Snoop State The Enhanced HALT Snoop State is the default Snoop State when the Enhanced HALT state is enabled via the BIOS The processor will remain in the lower bus ratio and VID operating point of the Enhanced HALT state While in the Enhanced HALT Snoop State snoops are handled the same way as in the HALT Snoop State After the snoop is serviced the processor will return to the Enhanced HALT Power Down state Datasheet intel 7 Note Boxed Processor Specifications Boxed Processor Specifications The Pentium 4 processor on 90 nm process in the 775 land package will also be offered as an Intel boxed processor Intel boxed processors are intended for system integrators who build systems from baseboards and standard components The boxed Pentium 4 processor in the 775 land package will be supplied with a cooling solution This chapter documents baseboard and system requirements for the cooling solu
104. p Max Unit Notes VID range VID 1 200 1 425 V 2 Vec for 775_VR_CONFIG_04B V B eekssois Refer to Table 2 10 and v 3 4 5 6 CC 3 80F GHz PRB 1 Figure 2 3 3 60F GHz PRB 1 3 40F GHz PRB 1 Voc for 775_VR_CONFIG_04A Refer to Table 2 9 and 3 4 6 7 Voc processors Figure 2 2 y 3 20F GHz PRB 0 lcc for processor with multiple VID 3 80F GHz PRB 1 119 9 cc 3 60F GHa PRB 1 e gt 119 A 3 40F GHz PRB 1 119 3 20F GHz PRB 0 78 loc Stop Grant Isent 3 80F GHz PRB 1 G _ 56 A 10 11 15 3 60F GHz PRB 1 56 3 40F GHz PRB 1 56 3 20F GHz PRB 0 40 Lee lcc TCC active lee A 12 FSB termination voltage 13 14 Vit DC AC specifications 1 14 EE e y DC Current that may be VTT OUT Icc drawn from VTT_OUT per 580 mA pin hr FSB termination current Ss 3 5 A 15 16 lcc vccA loc FOR PLL LANDS ES SCH 120 mA P 1 lec VvCCIOPLL lcc For VO PLL LAND We SCH 100 mA 8 loc_GTLREF lcc for GTLREF 200 HA 15 NOTES 1 Unless otherwise noted all specifications in this table are based on estimates and simulations or empirical data These specifications will be updated with characterized data from silicon measurements at a later date 2 Each processor is programmed with a maximum valid voltage identification value VID which is set at man ufacturing and can not be altered Individual maximum VID values are calibrated during manufacturing such that two processors at the same frequency may have different
105. power state entered when all the logical processors have executed the HALT or MWAIT instructions When one of the logical processors executes the HALT instruction that logical processor is halted however the other processor continues normal operation The processor will transition to the Normal state upon the occurrence of SMI BINIT INIT or LINT 1 0 NMI INTR RESET will cause the processor to immediately initialize itself The return from a System Management Interrupt SMI handler can be to either Normal Mode or the HALT Power Down state See the Intel Architecture Software Developer s Manual Volume III System Programmer s Guide for more information The system can generate a STPCLK while the processor is in the HALT Power Down state When the system deasserts the STPCLK interrupt the processor will return execution to the HALT state While in HALT Power Down state the processor will process bus snoops Enhanced HALT Powerdown State Enhanced HALT is a low power state entered when all logical processors have executed the HALT or MWAIT instructions and Enhanced HALT has been enabled via the BIOS When one of the logical processors executes the HALT instruction that logical processor is halted however the other processor continues normal operation The processor will automatically transition to a lower frequency and voltage operating point before entering the Enhanced HALT state Note that the processor FSB frequency is not al
106. r G11 DBI1 Source Synch Input Output H22 VSS Power Other G12 DSTBN1 Source Synch Input Output H23 VSS Power Other G13 D27 Source Synch Input Output H24 VSS Power Other G14 D29 Source Synch Input Output H25 VSS Power Other G15 D31 Source Synch Input Output H26 VSS Power Other G16 D32 Source Synch Input Output H27 VSS Power Other G17 D36 Source Synch Input Output H28 VSS Power Other G18 D35 Source Synch Input Output H29 GTLREF_SEL Power Other Output G19 DSTBP2 Source Synch Input Output H30 BSEL1 Power Other Output G20 DSTBN2 Source Synch Input Output Ji VTT_OUT_LEFT Power Other Output G21 D44 Source Synch Input Output J2 FC3 Power Other Input G22 D47 Source Synch Input Output J3 RESERVED G23 RESET Common Clock Input J4 VSS Power Other G24 TESTHI6 Power Other Input J5 REQ14 Source Synch Input Output G25 TESTHIS Power Other Input J6 REQ4 Source Synch Input Output G26 TESTHI5 Power Other Input J7 VSS Power Other G27 TESTHI4 Power Other Input J8 VCC Power Other G28 BCLK1 Clock Input J9 VCC Power Other G29 BSELO Power Other Output J10 VCC Power Other G30 BSEL2 Power Other Output J11 VCC Power Other H1 GTLREF Power Other Input J12 VCC Power Other Datasheet Datasheet Table 4 2 Numerical Land Assignment Land Listing and Signal Descriptions Table 4 2 Numerical Land Assignment
107. r Loading Specifications Parameter Minimum Maximum Notes Static 80 N 18 lbf 311 N 70 Ibf 112 3 Dynamic 756 N 170 Ibf 1 3 4 NOTES 1 These specifications apply to uniform compressive loading in a direction normal to the processor IHS 2 This is the maximum force that can be applied by a heatsink retention clip The clip must also provide the minimum specified load on the processor package 3 These specifications are based on limited testing for design characterization Loading limits are for the package only and does not include the limits of the processor socket 4 Dynamic loading is defined as the sum of the load on the package from a 1 lb heatsink mass accelerating through a 11 ms trapezoidal pulse of 50 g and the maximum static load Package Handling Guidelines Table 3 2 includes a list of guidelines on package handling in terms of recommended maximum loading on the processor IHS relative to a fixed substrate These package handling loads may be experienced during heatsink removal Package Handling Guidelines Parameter Maximum Recommended Notes Shear 311 N 70 Ibf 1 4 Tensile 111 N 25 Ibf 2ra Torque 3 95 N m 35 Ibf in Se NOTES 1 A shear load is defined as a load applied to the IHS in a direction parallel to the IHS top surface 2 A tensile load is defined as a pulling load applied to the IHS in a direction normal to the IHS surface 3 A torque load is defined as a twisting load applied to t
108. r Other K28 VCC Power Other N7 VSS Power Other K29 VCC Power Other N8 VCC Power Other K30 VCC Power Other N23 VCC Power Other L1 LINT1 Asynch GTL Input N24 VCC Power Other L2 TESTHI13 Asynch GTL Input N25 VCC Power Other L3 vss Power Other N26 VCC Power Other L4 A6 Source Synch Input Output N27 VCC Power Other L5 A3 Source Synch Input Output N28 VCC Power Other L6 VSS Power Other N29 VCC Power Other L7 VSS Power Other N30 VCC Power Other 57 Land Listing and Signal Descriptions 58 Table 4 2 Numerical Land Assignment intel Table 4 2 Numerical Land Assignment ee Land Name G i Direction san Land Name Paa Direction P1 TESTHI11 Power Other Input T24 VCC Power Other P2 SMI Asynch GTL Input T25 VCC Power Other P3 INIT Asynch GTL Input T26 VCC Power Other P4 vss Power Other T27 VCC Power Other P5 RESERVED T28 VCC Power Other P6 A4 Source Synch Input Output T29 VCC Power Other P7 VSS Power Other T30 VCC Power Other P8 VCC Power Other U1 VSS Power Other P23 VSS Power Other U2 APO Common Clock Input Output P24 VSS Power Other U3 AP1 Common Clock Input Output P25 VSS Power Other U4 A13 Source Synch Input Output P26 VSS Power Other U5 A12 Source Synch Input Output P27 VSS Power Other U6 A10 Source Synch Input Output P28 VSS Power Other U7 VSS Pow
109. r Vyr voltage level for the processor VTT_SEL 1 for the Pentium 4 processor in the 775 land package The GILREF_SEL signal is used by the platform to select the appropriate chipset GTLREF level GTLREF_SEL 0 for the Pentium 4 processor in the 775 land package LL_ID 1 0 and VTT_SEL are signals that are implemented on the processor package That is they are either connected directly to Vgg or are open lands Electrical Specifications Table 2 2 Voltage Identification Definition VID5 VID4 VID3 VID2 VID1 VIDO VID VID5 VID4 VID3 VID2 VID1 VIDO VID 0 0 1 0 1 0 0 8375 0 1 1 0 1 0 1 2125 1 0 1 0 0 1 0 8500 1 1 1 0 0 1 1 2250 0 0 1 0 0 1 0 8625 0 1 1 0 0 1 1 2375 1 0 1 0 0 0 0 8750 1 1 1 0 0 0 1 2500 0 0 1 0 0 0 0 8875 0 1 1 0 0 0 1 2625 1 0 0 1 1 1 0 9000 1 1 0 1 1 1 1 2750 0 0 0 1 1 1 0 9125 0 1 0 1 1 1 1 2875 1 0 0 1 1 0 0 9250 1 1 0 1 1 0 1 3000 0 0 0 1 1 0 0 9375 0 1 0 1 1 0 1 3125 1 0 0 1 0 1 0 9500 1 1 0 1 0 1 1 3250 0 0 0 1 0 1 0 9625 0 1 0 1 0 1 1 3375 1 0 0 1 0 0 0 9750 1 1 0 1 0 0 1 3500 0 0 0 1 0 0 0 9875 0 1 0 1 0 0 1 3625 1 0 0 0 1 1 1 0000 1 1 0 0 1 1 1 3750 0 0 0 0 1 1 1 0125 0 1 0 0 1 1 1 3875 1 0 0 0 1 0 1 0250 1 1 0 0 1 0 1 4000 0 0 0 0 1 0 1 0375 0 1 0 0 1 0 1 4125 1 0 0 0 0 1 1 0500 1 1 0 0 0 1 1 4250 0 0 0 0 0 1 1 0625 0 1 0 0 0 1 1 4375 1 0 0 0 0 0 1 0
110. r atomically This signal must connect the appropriate pins lands of all processor FSB agents For a locked sequence of transactions LOCK is asserted from the beginning of the first transaction to the end of the last transaction When the priority agent asserts BPRI to arbitrate for ownership of the processor FSB it will wait until it observes LOCK de asserted This enables symmetric agents to retain ownership of the processor FSB throughout the bus locked operation and ensure the atomicity of lock MCERR Input Output MCERR Machine Check Error is asserted to indicate an unrecoverable error without a bus protocol violation It may be driven by all processor FSB agents MCERRi assertion conditions are configurable at a system level Assertion options are defined by the following options Enabled or disabled Asserted if configured for internal errors along with IERR e Asserted if configured by the request initiator of a bus transaction after it observes an error Asserted by any bus agent when it observes an error in a bus transaction For more details regarding machine check architecture refer to the A 32 Software Developer s Manual Volume 3 System Programming Guide MSID 1 0 Output MSID 1 0 are provided to indicate the market segment for the processor and may be used for future processor compatibility or for keying 68 Datasheet Land Listing and Signal Descriptions
111. re Software Developer s Manual IA 32 Intel Architecture Software Developer s Manual Volume 1 Basic Architecture IA 32 Intel Architecture Software Developer s Manual Volume 2A Instruction Set Reference Manual A M A 32 Intel Architecture Software Developer s Manual Volume 2B Instruction Set Reference Manual N Z A 32 Intel Architecture Software Developer s Manual Volume 3 System Programming Guide http developer intel com design pentium4 manuals 253665 htm http developer intel com design pentium4 manuals 253666 htm http developer intel com design pentium4 manuals 253667 htm http developer intel com design pentium4 manuals 253668 htm Intel Extended Memory 64 Technology Software Developer Guide http developer intel com technology 64bitextensions 300834 htm Datasheet 11 Introduction i ntel 42 Datasheet 2 1 2 2 2 3 Datasheet Electrical Specifications Electrical Specifications FSB and GTLREF Most processor FSB signals use Gunning Transceiver Logic GTL signaling technology Platforms implement a termination voltage level for GTL signals defined as Vyr Vrr must be provided via a separate voltage source and not be connected to Vcc This configuration allows for improved noise tolerance as processor frequency increases Because of the speed improvements to the data and address bus signal integrity and platform design methods have become more criti
112. reset their bus LOCK activity and bus request arbitration state machines The bus agents do not reset their IOQ and transaction tracking state machines upon observation of BINIT activation Once the BINIT assertion has been observed the bus agents will re arbitrate for the FSB and attempt completion of their bus queue and IOQ entries If BINIT observation is disabled during power on configuration a central agent may handle an assertion of BINIT as appropriate to the error handling architecture of the system BNR Input Output BNR Block Next Request is used to assert a bus stall by any bus agent unable to accept new bus transactions During a bus stall the current bus owner cannot issue any new transactions BOOTSELECT Input This input is required to determine whether the processor is installed in a platform that supports the Pentium 4 processor in the 775 land package The processor will not operate if this signal is low This input has a weak internal pull up to Vcc BPM 5 0 Input Output BPM 5 0 Breakpoint Monitor are breakpoint and performance monitor signals They are outputs from the processor which indicate the status of breakpoints and programmable counters used for monitoring processor performance BPM 5 0 should connect the appropriate pins lands of all processor FSB agents BPM4 provides PRDY Probe Ready functionality for the TAP port PRDY is a processor output used by debug tools
113. s increased the required thermal solutions have generated increasingly more noise Intel has added an option to the boxed processor that allows system integrators to have a quieter system in the most common usage The 4th wire PWM solution provides better control over chassis acoustics This is achieved by more accurate measurement of processor die temperature through the processor s temperature diode Tgiode Fan RPM is modulated through the use of an ASIC located on the motherboard that sends out a PWM control signal to the 4th pin of the connector labeled as CONTROL The fan speed is based on actual processor temperature instead of internal ambient chassis temperatures If the new 4 pin active fan heat sink solution is connected to an older 3 pin baseboard processor fan header 1t will default back to a thermistor controlled mode allowing compatibility with existing 3 pin baseboard designs Under thermistor controlled mode the fan RPM is automatically varied based on the Tinlet temperature measured by a thermistor located at the fan inlet For more details on specific motherboard requirements for 4 wire based fan speed control see the Intel Pentium 4 Processor on 90 nm Process in the 775 Land Package Thermal Design Guide Datasheet
114. server support for Intel Extended Memory 64 002 Technology September 2004 003 Added Support for 3 80F GHz processor November 2004 004 Updated the Introduction Electrical Thermal Specifications and November 2004 Feature Sections Contents intel Intel Pentium 4 Processor Supporting Hyper Threading Technology Available at 3 80F GHz 3 60F GHz 3 40F GHz and 3 20F GHz Supports Hyper Threading Technology HT Technology for all frequencies with 800 MHz front side bus FSB Supports Intel Extended Memory 64 Technology Intel EM64T Supports Execute Disable Bit capability Binary compatible with applications running on previous members of the Intel microprocessor line Intel NetBurst microarchitecture FSB frequency at 800 MHz Hyper Pipelined Technology Advance Dynamic Execution Very deep out of order execution Enhanced branch prediction 775 land Package 16 KB Level data cache 1 MB Advanced Transfer Cache on die full speed Level 2 L2 cache with 8 way associativity and Error Correcting Code ECC 144 Streaming SIMD Extensions 2 SSE2 instructions 13 Streaming SIMD Extensions 3 SSE3 instructions Enhanced floating point and multimedia unit for enhanced video audio encryption and 3D performance Power Management capabilities System Management mode Multiple low power states 8 way cache associativity provides improved cache hit rate on load store operations The Intel Pen
115. sink Figure 7 1 shows a mechanical representation of the boxed Pentium 4 processor in the 775 land package Clearance is required around the fan heatsink to ensure unimpeded airflow for proper cooling The physical space requirements and dimensions for the boxed processor with assembled fan heatsink are shown in Figure 7 2 side view and Figure 7 3 top view The airspace requirements for the boxed processor fan heatsink must also be incorporated into new baseboard and system designs Airspace requirements are shown in Figure 7 7 and Figure 7 8 Note that some figures have centerlines shown marked with alphabetic designations to clarify relative dimensioning Figure 7 2 Space Requirements for the Boxed Processor Side View Figure 7 3 Space Requirements for the Boxed Processor Top View 88 3 74 95 07 gt 0 39 0 98 ll 10 0 E Y r t 3 74 95 0 3 74 95 0 NOTES 1 Diagram does not show the attached hardware for the clip design and is provided only as a mechanical representation Datasheet intel Boxed Processor Specifications Figure 7 4 Space Requirements for the Boxed Processor Overall View 7 1 2 7 1 3 7 2 7 2 1 Datasheet Boxed Processor Fan Heatsink Weight The boxed processor fan heatsink will not weigh more than 450 grams See Chapter 5 and the Intel Pentium 4 Processor on 90 nm Process in the 775 Land Package Thermal Design
116. synchronous signals and are latched into the receiving buffers by ADSTB 1 0 On the active to inactive transition of RESET the processor samples a subset of the A 35 3 signals to determine power on configuration See Section 6 1 for more details If A20M Address 20 Mask is asserted the processor masks physical address bit 20 A20 before looking up a line in any internal cache and before driving a read write transaction on the bus Asserting A20M emulates the 8086 processor s address wrap around at the 1 MB boundary Assertion of A20M is only supported in real mode A20M is an asynchronous signal However to ensure recognition of this signal following an Input Output write instruction it must be valid along with the TRDY assertion of the corresponding Input Output Write bus transaction ADS Input Output ADS Address Strobe is asserted to indicate the validity of the transaction address on the A 35 3 and REQ 4 0 signals All bus agents observe the ADS activation to begin parity checking protocol checking address decode internal snoop or deferred reply ID match operations associated with the new transaction ADSTB 1 0 Input Output Address strobes are used to latch A 35 3 and REQ 4 0 on their rising and falling edges Strobes are associated with signals as shown below Signals Associated Strobe REQ 4 0 A 16 3 ADSTBO A 35 1 7 ADSTB1 AP 1 lg Input Output AP 1 0 A
117. systems the system processor thermal solution should be designed such that the processor remains within the minimum and maximum case temperature Tc specifications when operating at or below the Thermal Design Power TDP value listed per frequency in Table 5 1 Thermal solutions not designed to provide this level of thermal capability may affect the long term reliability of the processor and system For more details on thermal solution design refer to the appropriate processor thermal design guidelines The Pentium 4 processor in the 775 land package introduces a new methodology for managing processor temperatures which is intended to support acoustic noise reduction through fan speed control Selection of the appropriate fan speed will be based on the temperature reported by the processor s thermal diode If the diode temperature is greater than or equal to T ontro then the processor case temperature must remain at or below the temperature as specified by the thermal profile If the diode temperature is less than T ontro then the case temperature is permitted to exceed the thermal profile but the diode temperature must remain at or below Tcontrol Systems that implement fan speed control must be designed to take these conditions into account Systems that do not alter the fan speed only need to guarantee the case temperature meets the thermal profile specifications To determine a processor s case temperature specification based on the thermal pro
118. temperature specification based on a temperature reading from the thermal diode The value for Teontro Will be calibrated in manufacturing and configured for each processor The Tcontrol temperature for a given processor can be obtained by reading the 1432_TEMPERATURE_TARGET MSR in the processor The T ontro Value that is read from the 14A32_TEMPERATURE_TARGET MSR needs to be converted from Hexadecimal to Decimal and added to a base value of 50 C The value of Tcontrol may vary from 00h to 1Eh 0 to 30 C When Tuioae is above Teontro then Tc must be at or below Tc max as defined by the thermal profile in Table 5 2 and Figure 5 1 otherwise the processor temperature can be maintained at Tcoontrol or lower as measured by the thermal diode The purpose of this feature is to support acoustic optimization through fan speed control Datasheet intel 5 2 7 Table 5 4 Table 5 5 Datasheet Thermal Specifications and Design Considerations Thermal Diode The processor incorporates an on die thermal diode A thermal sensor located on the system board may monitor the die temperature of the processor for thermal management long term die temperature change purposes Table 5 4 and Table 5 5 provide the diode parameter and interface specifications This thermal diode is separate from the Thermal Monitor s thermal sensor and cannot be used to predict the behavior of the Thermal Monitor Therm
119. tered only the internal core frequency is changed When entering the low power state the processor will first switch to the lower bus ratio and then transition to the lower VID While in Enhanced HALT state the processor will process bus snoops The processor exits the Enhanced HALT state when a break event occurs When the processor exits the Enhanced HALT state it will first transition the VID to the original value and then change the bus ratio back to the original value Datasheet Features Figure 6 1 Processor Low Power State Machine 6 2 3 Datasheet HALT or MWAIT Instruction and HALT Bus Cycle Gi ted N I Stat mas gt Enhanced HALT or HALT State Bi W e i INIT BINIT INTR NMI SMI BCLK running Kell RESETH FSB interrupts Snoops and interrupts allowed A A K eo Snoop Snoop STPCLK STPCLK EL Event Event Asserted De asserted Ke Occurs Serviced QS R cf Y HALT Snoop State BCLK running Service snoops to caches v Y Stop Grant State ds S eae gt Grant Snoop State BCLK running BCLK running Snoops and interrupts allowed 4 Snoop Event Serviced Service snoops to caches Stop Grant State When the STPCLK signal is asserted the Stop Grant state of the processor is entered 20 bus clocks after the response phase of the processor issued Stop Grant Acknowledge special bus cycle Since the GTL signals re
120. that is independent of the socket Storage conditions Refers to a non operational state The processor may be installed in a platform in a tray or loose Processors may be sealed in packaging or exposed to free air Under these conditions processor lands should not be connected to any supply voltages have Datasheet Introduction any I Os biased or receive any clocks Upon exposure to free air 1 e unsealed packaging or a device removed from packaging material the processor must be handled in accordance with moisture sensitivity labeling MSL as indicated on the packaging material Functional operation Refers to normal operating conditions in which all processor specifications including DC AC system bus signal quality mechanical and thermal are satisfied 1 2 References Material and concepts available in the following documents may be beneficial when reading this document Table 1 1 References Document Document Numbers Location Intel Pentium 4 Processor on 90 nm Process Specification Update http developer intel com design Pentium4 specupdt 302352 htm Inte Pentium 4 Processor on 90 nm Process in the 775 Land Package http developer intel com o design Pentium4 guides Thermal Design Guidelines 302553 htm http developer intel com Voltage Regulator Down VRD 10 1 Design Guide For Desktop LGA775 Socket design Pentium4 guides 302356 htm Intel Architectu
121. thers Copyright O 2004 Intel Corporation 2 Datasheet ntel E Contents Contents 1 INTrOdUCHON uuu o eae ea eee 9 LE Tominog iia aos 10 1 1 1 Processor Packaging Terminology ococccconnnnincccnnnncccccnnnnnnnnnnnnonnnnnnnnnnnnnnn nn nana 10 1 2 RENCE ii amaya tees Mee 11 2 Electrical Specifications inoran ei eave di ear 13 21 FSB and GTLREF viniste tao aAa areas 13 2 2 Power and Ground Landes n n 13 2 3 Decoupling Guidelines uu u uuu iia ade 13 23 1 NOC Decoupling tivos 14 20 2 FSB GTL DECOUPIINO mm 14 2 3 3 FSB Clock BCLK 1 0 and Processor Clocking 14 2 4 Voltage Identili6all Rhu x asuata pay eane decai tects 15 2 4 1 Phase Lock Loop PLL Power and Eiter 17 2 5 Reserved Unused FC and TESTHI Gionals a 18 20 FSB Sigal Grops EE 19 2 7 E ASYNChronous EE 20 28 Test Access Port TAP Connection cnn nac rra rra 21 2 9 FSB Frequency Select Signals BSEL 2 0 a 21 2 10 Absolute Maximum and Minimum Ratings U cnn 22 2 11 Processor DC Specifications AANEREN 22 2 12 VCC Overshoot Specification rn nn rn 29 a 12 1 Die Voltage validation uu u Sas dei 30 213 GIIL FSB Specifications EE 30 3 Package Mechanical Specifications r 33 3 1 Package Mechanical Specifications nero conan nana nc non rn naaa
122. ting large current swings between low and full power states This may cause voltages on power planes to sag below their minimum values if bulk decoupling is not adequate Care must be taken in the board design to ensure that the voltage provided to the processor remains within the specifications listed in Table 2 8 Failure to do so can result in timing violations or reduced lifetime of the component For further information and design guidelines refer to the Voltage Regulator Down VRD 10 1 Design Guide For Desktop LGA775 Socket Electrical Specifications I ntel E 2 3 1 2 3 2 2 3 3 Vcc Decoupling Regulator solutions need to provide bulk capacitance with a low Effective Series Resistance ESR and keep a low interconnect resistance from the regulator to the socket Bulk decoupling for the large current swings when the part is powering on or entering exiting low power states must be provided by the voltage regulator solution VR For more details on this topic refer to the Voltage Regulator Down VRD 10 1 Design Guide For Desktop LGA775 Socket FSB GTL Decoupling The Pentium 4 processor in the 775 land package integrates signal termination on the die as well as incorporating high frequency decoupling capacitance on the processor package Decoupling must also be provided by the system baseboard for proper GTL bus operation FSB Clock BCLK 1 0 and Processor Clocking BCLK 1 0 directly controls the FSB interface speed as wel
123. tion that will be supplied with the boxed Pentium 4 processor in the 775 land package This chapter is particularly important for OEMSs that manufacture baseboards for system integrators Unless otherwise noted all figures in this chapter are dimensioned in millimeters and inches in brackets Figure 7 1 shows a mechanical representation of a boxed Pentium 4 processor in the 775 land package Drawings in this section reflect only the specifications on the Intel boxed processor product These dimensions should not be used as a generic keep out zone for all cooling solutions It is the system designers responsibility to consider their proprietary cooling solution when designing to the required keep out zone on their system platforms and chassis Refer to the Intel Pentium 4 Processor on 90 nm Process in the 775 Land Package Thermal Design Guidelines for further guidance Contact your local Intel Sales Representative for this document Figure 7 1 Mechanical Representation of the Boxed Processor Datasheet NOTE The airflow of the fan heatsink is into the center and out of the sides of the fan heatsink 87 Boxed Processor Specifications I ntel E 7 1 7 1 1 Mechanical Specifications Boxed Processor Cooling Solution Dimensions This section documents the mechanical specifications of the boxed Pentium 4 processor on 90 nm process in the 775 land package The boxed processor will be shipped with an unattached fan heat
124. tion to the new core operating voltage by issuing a new VID code to the voltage regulator The voltage regulator must support VID transitions in order to support Thermal Monitor 2 During the voltage change it will be necessary to transition through multiple VID codes to reach the target operating voltage Each step will be one VID table entry i e 12 5 mV steps The processor continues to execute instructions during the voltage transition Operation at this lower voltage reduces both the dynamic and leakage power consumption of the processor providing a reduction in power consumption at a minimum performance impact Once the processor has sufficiently cooled and a minimum activation time has expired the operating frequency and voltage transition back to the normal system operating point Transition of the VID code will occur first in order to insure proper operation once the processor reaches its normal operating frequency Refer to Figure 5 4 for an illustration of this ordering Datasheet Thermal Specifications and Design Considerations Figure 5 4 Thermal Monitor 2 Frequency and Voltage Ordering 5 2 3 5 2 4 Datasheet Temperature VE TM2 Frequency VID VID sys PROCHOT Time gt The PROCHOT signal is asserted when a high temperature situation is detected regardless of whether or not Thermal Monitor or Thermal Monitor 2 is enabled It should be noted that the Thermal Monitor 2 TC
125. tions nara ncn rn nn r rca 28 2 13PWRGOOD and TAP Signal Group DC Specifications 28 2 15BSEL 2 0 and VID 5 0 DC Specifications nano rrnrrcnnr ran 29 2 16BOOTSELECT DC Specifications AAA 29 2 17VCC Overshoot Specifications nn 29 2 18GTL Bus Voltage Definitions L uu ULU aasawa datada 31 3 1 Processor Loading Specifications ass 37 3 2 Package Handling Guidelines A 37 323 Processor Materials iii T EEdEE 38 4 1 Alphabetical Land Assignment o cccconnnnnccccnnnononcnnnncnnnnccnnnnnnn rca rre 44 4 2 Numerical Land Assignment esseere anna a aaa AAEE EATA 640616 4406015 AEEA yantana 54 4 3 Signal Description Sheet 1 Of Oo 64 5 1 Processor Thermal Gpecficaitons sassa 74 5 2 Thermal Profile for Processors with PRB 1 aran cnn nan rr crac 74 5 3 Thermal Profile for Processors with PRB 0 75 5 4 Thermal Diode Parameter r ai aid 81 5 5 Thermal Diode Interface ooooomoocccnnnnicccnnnnnncccnnnnnnnccnnnnn nr 81 6 1 Power On Configuration Option Gionas non c conca naar nn nnnn cnn arranca 83 7 1 Fan Heatsink Power and Signal Specifications a 90 7 2 Fan Heatsink Power and Signal Specifications cnn nrnn cnn nan nn 94 6 Datasheet intel Revision History Datasheet Contents Revision No Description Date of Release 001 Initial release August 2004 Added
126. tium 4 processor family supporting Hyper Threading Technology HT Technology delivers Intel s advanced powerful processors for desktop PCs and entry level workstations that are based on the Intel NetBurst microarchitecture The Pentium 4 processor is designed to deliver performance across applications and usages where end users can truly appreciate and experience the performance These applications include Internet audio and streaming video image processing video content creation speech 3D CAD games multimedia and multitasking user environments Datasheet Note Datasheet Introduction Introduction The Intel Pentium 4 processor on 90 nm process in the 775 land package is a follow on to the Pentium 4 processor in the 478 pin package with enhancements to the Intel N etBurst microarchitecture The Pentium 4 processor on 90 nm process in the 775 land package uses Flip Chip Land Grid Array FC LGA4 package technology and plugs into a 775 land LGA socket referred to as the LGA775 socket The Pentium 4 processor in the 775 land package like its predecessor the Pentium 4 processor in the 478 pin package is based on the same Intel 32 bit microarchitecture and maintains the tradition of compatibility with IA 32 software Select versions of the processor support Intel Extended Memory 64 Technology Intel EM64T as an enhancement to Intel s IA 32 architecture on server and workstation platforms This enhancement enab
127. to determine processor debug readiness BPM5 provides PREQ Probe Request functionality for the TAP port PREQ is used by debug tools to request debug operation of the processor These signals do not have on die termination Refer to Section 2 5 for termination requirements BPRI Input BPRI Bus Priority Request is used to arbitrate for ownership of the processor FSB It must connect the appropriate pins lands of all processor FSB agents Observing BPRI active as asserted by the priority agent causes all other agents to stop issuing new requests unless such requests are part of an ongoing locked operation The priority agent keeps BPRI asserted until all of its requests are completed then releases the bus by de asserting BPRI BRO Input Output BRO drives the BREQO signal in the system and is used by the processor to request the bus During power on configuration this signal is sampled to determine the agent ID 0 This signal does not have on die termination and must be terminated BSEL 2 0 Output The BCLK 1 0 frequency select signals BSEL 2 0 are used to select the processor input clock frequency Table 2 6 defines the possible combinations of the signals and the frequency associated with each combination The required frequency is determined by the processor chipset and clock synthesizer All agents must operate at the same frequency For more information about these signals including termin
128. ut Output B2 DBSY Common Clock Input Output C13 VSS Power Other B3 RSO Common Clock Input C14 D52 Source Synch Input Output B4 DOH Source Synch Input Output C15 D51 Source Synch Input Output B5 VSS Power Other C16 VSS Power Other B6 D5 Source Synch Input Output C17 DSTBP3 Source Synch Input Output B7 D6 Source Synch Input Output C18 D54 Source Synch Input Output B8 VSS Power Other C19 VSS Power Other B9 DSTBPO Source Synch Input Output C20 DBI3 Source Synch Input Output B10 D10 Source Synch Input Output C21 D58 Source Synch Input Output B11 VSS Power Other C22 VSS Power Other B12 D13 Source Synch Input Output C23 VCCIOPLL Power Other Datasheet Datasheet Table 4 2 Numerical Land Assignment Land Listing and Signal Descriptions Table 4 2 Numerical Land Assignment cama Land Name Re Direction wie Land Name Weg Cie Direction C24 VSS Power Other E6 RESERVED C25 VTT Power Other E7 RESERVED C26 VTT Power Other E8 VSS Power Other C27 VTT Power Other E9 D19 Source Synch Input Outpu C28 VTT Power Other E10 D21 Source Synch Input Outpu C29 VTT Power Other E11 VSS Power Other C30 VTT Power Other E12 DSTBP1 Source Synch Input Outpu D1 RESERVED E13 D26 Source Synch Input Outpu D2 ADS Common Clock Input Output E14 VSS Power Other D3 VSS Power Other E1
129. ut Output E3 TRDY Common Clock Input F16 VSS Power Other E4 HITM Common Clock Input Output F17 D37 Source Synch Input Output E5 RESERVED F18 D38 Source Synch Input Output 55 Land Listing and Signal Descriptions 56 Table 4 2 Numerical Land Assignment intel Table 4 2 Numerical Land Assignment ee Land Name ee Direction W Land Name died Direction F19 VSS Power Other H2 FC6 Power Other Input F20 D41 Source Synch Input Output H3 VSS Power Other F21 D43 Source Synch Input Output H4 RSP Common Clock Input F22 VSS Power Other H5 TESTHI10 Power Other Input F23 RESERVED H6 VSS Power Other F24 TESTHI7 Power Other Input H7 VSS Power Other F25 TESTHI2 Power Other Input H8 VSS Power Other F26 TESTHIO Power Other Input H9 VSS Power Other F28 BCLKO Clock Input H10 VSS Power Other F29 RESERVED H11 VSS Power Other G1 VSS Power Other H12 VSS Power Other G2 FC1 Power Other Input H13 VSS Power Other G3 TESTHI8 Power Other Input H14 VSS Power Other G4 TESTHI9 Power Other Input H15 DP1 Common Clock Input Output G5 FC7 Source Synch Output H16 DP2 Common Clock Input Output G6 RESERVED H17 VSS Power Other G7 DEFER Common Clock Input H18 VSS Power Other G8 BPRI Common Clock Input H19 VSS Power Other G9 D16 Source Synch Input Output H20 VSS Power Other G10 RESERVED H21 VSS Power Othe
130. w VR thermal designs to target maximum sustained current instead of maximum current Systems should still provide proper cooling for the VR and rely on bi directional PROCHOT only as a backup in case of system cooling failure The system thermal design should allow the power delivery circuitry to operate within its temperature specification even while the processor is operating at its Thermal Design Power With a properly designed and characterized thermal solution it is anticipated that bi directional PROCHOT would only be asserted for very short periods of time when running the most power intensive applications An under designed thermal solution that is not able to prevent excessive assertion of PROCHOT in the anticipated ambient environment may cause a noticeable performance loss Refer to the Voltage Regulator Down VRD 10 1 Design Guide for Desktop Socket 775 for details on implementing the bi directional PROCHOT feature THERMTRIP Signal Regardless of whether or not the Thermal Monitor feature is enabled in the event of a catastrophic cooling failure the processor will automatically shut down when the silicon has reached an elevated temperature refer to the THERMTRIP definition in Table 4 3 At this point the FSB signal THERMTRIP will go active and stay active as described in Table 4 3 THERMTRIP activation is independent of processor activity and does not generate any bus cycles Tcontro and Fan Speed Reduction Tcontro 18 a
131. wer Other VSS AM10 Power Other VSS D21 Power Other VSS AM13 Power Other VSS D24 Power Other VSS AM16 Power Other VSS D3 Power Other VSS AM17 Power Other VSS D5 Power Other VSS AM20 Power Other VSS D6 Power Other VSS AM23 Power Other VSS D9 Power Other 51 Land Listing and Signal Descriptions 52 Table 4 1 Alphabetical Land Assignments Intel Table 4 1 Alphabetical Land Assignments Land Name md EE Direction Land Name H WA Direction VSS E11 Power Other VSS H9 Power Other VSS E14 Power Other VSS J4 Power Other VSS E17 Power Other VSS J7 Power Other VSS ES Power Other VSS K2 Power Other VSS E20 Power Other VSS K5 Power Other VSS E25 Power Other VSS K7 Power Other VSS E26 Power Other VSS L23 Power Other VSS E27 Power Other VSS L24 Power Other VSS E28 Power Other VSS L25 Power Other VSS E29 Power Other VSS L26 Power Other VSS E8 Power Other vss L27 Power Other vss F10 Power Other VSS L28 Power Other VSS F13 Power Other VSS L29 Power Other VSS F16 Power Other VSS L3 Power Other VSS F19 Power Other VSS L30 Power Other VSS F22 Power Other VSS L6 Power Other VSS F4 Power Other VSS L7 Power Other VSS F7 Power Other VSS M1 Power Other VSS G1 Power Other VSS M7 Power Other VSS H10 Power Other VSS N3 Power Other VSS H11 Power Other VSS

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