Broaddown2 User Manual Issue – 1.02
Contents
1. Figure 4 Broaddown2 with LED USB Module and DIP Switch fitted The flash memory s can be re programmed at any time using the appropriate JTAG interface You will need a JTAG programming cable PROG1 2 or Xilinx Parallel IV or Xilinx USB programming cables flying leads needed together with Xilinx ISE tools to re program the Platform Flash devices Enterpoint Ltd Broaddown2 M anual Issue 1 02 06 08 2005 Broaddo wn2 Features Power Inputs d n k l b i rl i a LI i 1 Broaddown2 can take current from either the PCI edge connector or the Disk Drive Connector at the top left ofthe card The power supplies on the PCI edge connector can be isolated by jumpers J24 and J30 should a power supply contention issue arise It is recommended that for currents greater than 2 amps on the 5V input and 0 5 amp on the 12V rail then the disk drive connector should be used The principal input to Broaddown2 is the 5V input The 12V input is only used to feed the Negative Voltage Rail circuits and for the Moel Bryn expansion position Reset able poly fuses are fitted to both the 5V and 12V inputs Respective notional ratings of 7 amps and 3 amps are the limits of power input The actual trip currents ofthese devices will vary with cooling and ambient temperature and hence the operational cut offs may be much lower that these figures WARNING THE POLY FUSES CAN GET VER Y HOT IN NORMAL OPERATION PLEASE DO NOT TOUCH OR P2. point d ASIC Design Broaddown2 User Manual Issue 1 02 Enterpoint Ltd Broaddown2 M anual Issue 1 02 06 08 2005 Kit Contents You should receive the following items with you Broaddown2 development kit Broaddown2 Board J L L L Figure 1 Broaddown2 Board Enterpoint Ltd Broaddown2 M anual Issue 1 02 06 08 2005 Foreword PLEASE READ ALL OF THIS MANUAL BEFORE PLUGGING IN OR POWERING UP YOUR BROADDOWN2 PLEASE TAKE SPECIAL NOTE OF THE WARNINGS WITHIN THEMANUAL Trademarks Coolrunner Il Spartan 3 ISE EDK Webpack Xilinx are the registered trademarks of Xilinx Inc San Jose California U S Moel Bryn Broaddown2 are trademarks of Enterpoint Ltd Enterpoint Ltd Broaddown2 M anual Issue 1 02 06 08 2005 Introduction Welcome to your Broaddown2 the Ultimate Spartan 3 Development Board Broaddown2 is a member of Enterpoint s Moel Bryn product range and offers a highly flexible approach to prototyping FPGA and System designs The aim of this manual is assist in using the main features of Broaddown2 There are features such as regulator shutdown control and advanced programming features that are beyond the scope of this edition of the manual Should you have a need to use these features then please contact the support email support enterpoint co uk for detailed instructions to use these advanced features Broaddown2 comes in 3 prin
3. 13 NOT USED NOT USED 13 14 NOT USED NOT USED 14 15 SB SB 15 16 SB SB 16 17 SB SB 17 18 SB SB 18 19 19 20 20 21 21 22 22 23 23 24 24 25 25 26 26 27 27 28 28 29 29 30 30 31 31 32 32 33 33 34 34 ENSE Power SB Special Function General Spartan 3 I O LVDS Pair With Temniator Resistor Site LVDS Pair Without Temniator Resistor Site Gnd OV Enterpoint Ltd Broaddown2 M anual Issue 1 02 06 08 2005 The signals marker as LVDS P and LVDS N are routed such that the trace lengths approximately match and skew is minimised within pair Adjacent LVDS P and LVDS N form the matched pair at the RHS DIL Header and the Spartan 3 FPGA For example V11 and W11 form one pair LVDS pairs marked as with terminating resistor site can be used as LVDS inputs to the Spartan 3 when the resistor is fitted All LVDS pairs can be used as outputs from Spartan 3 The resistors are 0201 size and are located on the back of Broaddown2 underneath the Spartan 3 FPGA When not used as LVDS signals can be used as general I O subject to Bank Voltage Vccio5 s setting and standards mixture All I O in positions19 to 34 left and right columns connect to Bank5 of the FPGA Special Function pins are for advanced JT AG and M oel Bryn programming support and their use is currently beyond the scope of this manual Enterpoint Ltd Broaddown2 M anual Issue 1 02 06 08 2005 LHS DIL Header Card Edge Connector LHe
4. 23 24 24 25 25 26 26 27 27 28 28 29 29 30 30 General Spartan 3 VO LVDS Pair With Temniator Resistor Site LVDS Pair Without Temniator Resistor Site If you wish to have power and Gnd on this connector then you will need to use the solder bridges of the LHS DIL Header to make the necessary connections Spartan 3 voltage limits apply Enterpoint Ltd Broaddown2 M anual Issue 1 02 06 08 2005 The signals marker as LVDS P and LVDS N are routed such that the trace lengths approximately match and skew is minimised within pair Adjacent LVDS P and LVDS N form the matched pair at the LHS DIL Header and the Spartan 3 FPGA For example B19 and A19 form one pair LVDS pairs marked as with terminating resistor site can be used as LVDS inputs to the Spartan 3 when the resistor is fitted All LVDS pairs can be used as outputs from Spartan 3 The resistors are 0201 size and are located on the back of Broaddown2 underneath the Spartan 3 FPGA When not used as LVDS signals can be used as general I O The I O on this header connects to Banks 0 and 1 of the Spartan 3 FPGA Supported I O standards will be determined by Vecio0 or Veciol Bank Voltages and the Spartan 3 banking rules Please note that the PCI clock input from the PCI Edge Connector is connected to pin B11 which is in Banko If this input is to operate correctly then this may limit the Bank0 Vccio0 to being 3 3V and hence may limit the standards that can be supported by Bank0 a
5. BROADDOWN 2 IS INSERTED INCORRECTLY AND POWERED THE BROADDOWN2 AND HOST SYSTEM WILL BE DAMAGED PC POWER SUPPLIES OFFER VER Y LITTLE PROTECTION AND WE HAVE SEEN POWER SUPPLY LEADS MELT AND CATCH FIRE UNDER SHORT CIRCUIT CIRCUMSTANCES TAKE EXTRA CARE TO ENSURE BROADDOWN2 IS INSERTED CORRECTLY Broaddown2 has been design to work in both 3 3V and 5V PCI systems Forthis interface to work as a PCI interface y ou will need to buy or design a suitable FPGA PCI logic circuit or IP core Broaddown2 will be supplied with test builds containing a PCI IP core and other cores for your evaluation and use We are hoping to release our own low cost Target Only PCI Core shortly Broaddown2 supports a 32 bit 33 MHz implementation of PCI The pinout of the Spartan 3 FPGA has been chosen such that the PCI interface follows the Xilinx PCI IP core XC3S400 4FG456C pinout FPGA pin numbers are available on the customer schematics Our current test builds use the Xilinx PCI core Enterpoint Ltd Broaddown2 M anual Issue 1 02 06 08 2005 The Spartan 3 FPGA has an absolute input voltage maximum of 4 05 V 3 3V signalling To allow use in 5V PCI systems we have added Bus Switch parts IDTQS32X681 between the PCI Edge Connector and the Spartan 3 FPGA These parts limit the voltage seen by the Spartan 3 FPGA Technically addition of these parts make the interface non compliant with the PCI specification However in practise this implementation of the int
6. D LHI LHS HEADE LEI k BH FALE COLUM COLLUM SELECT The LHS DIL Header provides a simple mechanical and electrical interface for add on modules The connectors on this header are on a 0 1 inch 2 54 mm pitch and allow either custom modules stripboard or even dil style components 3 3V 2 5V only to be fitted The LHS DIL Header supports modules and components with horizontal lead pitches of 0 3 0 4 and 0 6 and 1 6 inch pitches The header has a permanent positive power pin at the top position of the right column It also has Gnd 0V at the bottom and top of left column of the header It is also possible to connect any right column to the RHS DIL Power Rail by means of solder bridges on the back of the Broaddown2 Similarly the any position on the left column can be connected to Gnd If any ofthe solder bridges are made then the user should ensure that the Spartan 2 FPGA does not attempt to drive the relevant pin Failure to do so may damage the Broaddown2 The LHS DIL Power Rail can be selected by jumper to 3 3V 2 5V or 1 8V Alternatively other supplies can be connected to the selector by flying wire It is advised that voltages outside 0 to 3 3V are not used unless special precautions are taken to protect Spartan 3 I Os The Spartan 3 has an absolute input voltage rating of 4 05 V The pinout ofthe selection header is as follows ET Enterpoint Ltd Broaddown2 M anual Issue 1 02 06 08 2005 The LHS DIL Header Spartan 3 pinout
7. DIL outline oscillator modules The clock signals are routed through the Bus Switches and then connected to the CPLDs CLOCK 1 is generated by an oscillator in socket J29 the right most socket and connects to all three CPLDs U6 U9 and U11 This clock can be used in the control of advanced programming and power control functions Within U11 it can also be routed to either signal CLOCK3 P or CLOCK3 N which are connected to the Spartan 3 FPGA as clock signals Default factory CPLD programming connects ULOCKI to drive CLOCK3 N ofthe Spartan 3 FPGA pin AA11 Enterpoint Ltd Broaddown2 M anual Issue 1 02 06 08 2005 CLOCK2 is generated by the left most Oscillator Socket It only connects to CPLD U11 From U11 it can be routed to either signal CLOCK3 P or CLOCK3 N which are connected to the Spartan 3 FPGA Default factory CPLD programming connects CLOCK2 to drive CLOCK3 P of the Spartan 3 FPGA pin Y11 If clock with a mark space ratio of 50 50 is desirable then implementing a divide by 2 in U11 can give an output s on CLOCK3 X approximately of the desired ration Otherwise U11 can be used to divide down a clock or produce phased clocks if that is desirable The Spartan 3 itself has DCMs to produce multiples divisions and phases of clock signals Please consult the Spartan 3 datasheet available from the Xilinx website at http www xilinx co m T Broaddown2 supports the DCI feature of Spartan 3 DCI can be used
8. connections are shown in the following table as is LVDS pair support LEFT COLUMN RIGHT COLUMN LEFT RIGHT COLUMN SPARTAN SPARTAN COLUMN POSITION 3 PIN 3 PIN POSITION 1 VCC 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 11 12 12 13 13 14 14 15 15 16 16 17 17 18 18 19 19 20 20 21 21 22 22 23 23 24 24 25 25 26 26 27 27 28 28 29 29 30 30 31 31 32 32 33 33 34 34 Power Spedal Function General Spartan 3 I O LVDS Pair With Temniator Resistor Site LVDS Pair Without Temniator Resistor Site GND Gnd 0V Most ofthese signals continue on to the Card Edge Connector for use there Enterpoint Ltd Broaddown2 M anual Issue 1 02 06 08 2005 The Edge Connector shares the LHS DIL signal connections to the Spartan 3 and the same signalling levels apply at this connector Signalling outside the OV to 3 3V should not be used on this connector as it could damage the Spartan 3 which is also connected to these signals The pinout of the Card Edge Connector follows and is a sub set of signals on LHS DIL Header and the signals on the A row ofthe Card Edge Connector connect symmetrically to the left column of the LHS DIL Header Similarly the B row connects tothe right column of the LHS DIL Header EDGE EDGE CONNECTOR SPARTAN 3 SPARTAN 3 CONNECTOR ROWA PIN PIN ROWB 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 11 12 12 13 13 14 14 15 15 16 16 17 17 18 18 19 19 20 20 21 21 22 22 23
9. connectors allow I O expansion over the normal Broaddown2 capabilities when a Moel Bryn Expansion M odule is fitted Enterpoint Ltd Broaddown2 M anual Issue 1 02 06 08 2005 CPLDS POWER CONTROL CPLD JTAG CPLD POWER PROGRAMMING CONNECTOR REGULATORS C OOLR UNN ER II CPLDS if LE SPARTAN 3 FPGA OSCILLATOR SOCKETS Figure 19 Broaddown2 CPLDs There are three Coolrunner II XC2C32 6CP56C CPLDs fitted to Broaddown2 These CPLDs support indirect access for the Spartan 3 FPGA tothe SODIMM serial prom These devices also support advance programmin g features such driving the FPGA JTAG chain for reprogramming purposes The CPLDs also support control of most of the linear regulators Using these features either groups or individual regulators can be turned off or on There is also support for programming and control of the Moel Bryn Expansion Position To access these features the 9 bit Expansion Bus connects the Spartan 3 FPGA to each of the CPLDs This bus may be used as a user wishes However Enterpoint is developing a standard approach to the bus use and this will be implemented in upgrades of Broaddown2 It will also be used in future products such as Broaddown3 and Broaddown4 A future release of this manual will provide more detail of this implementation The CPLDs have their own power supply in the shape of a TPD70402 twin regulator package By having regulators independent of the M ain and Secondary Regulators modelli
10. to match signal impedances to improve signal integrity Broaddown2 supports independent DCI functions for each bank of the Spartan 3 By default a 100 ohm resistor is connected between VRN VRP FPGA terminals and the appropriate power rails It also possible to connect parallel 100 ohm resistors by solder bridge independently on each VRN or VRP branch The effect of connecting parallel resistors is to change the effective resistance from 100 ohm to 50 ohm Please refer to customer schematics for details of solder brid ge connections Figure 17 DCI Solder Bridges and LVDS Termination Resistors Broaddown2 supports 17 input LVDS pairs when termination resistors are fitted A further 20 pairs of LVDS are supported for output only on LHS and RHS DIL Headers Other LVDS output pairs are possible via PCI Edge Connector or the SODIMM Socket if these are not being used for their primary functions Vref voltages are supported in Banks 2 3 and 4 Please see the section on the Vref Header for voltage selection Enterpoint Ltd Broaddown2 M anual Issue 1 02 06 08 2005 Moel Bryn Expansion Position Figure 18 Moel Bryn Expansion Moel Bryn expansion uses solder less connectors to connect modules to the Broaddown2 Enterpoint will be releasing a series of modules shortly for this advanced expansion capability The details of this interface will only be released under license and may be subject to license or royalty fee The associate YFS
11. 100 MHz clock are to be expected The signals of the SODIMM Socket have been connected to banks 2 3 4 of the Spartan 3 FPGA To use a DDR2 module you will need to set the relevant Vcciox bank and Vref reference voltages to 1 8V and SODIMM reference voltage respectively Track lengths between the SODIMM Socket and the Spartan 3 have been matched as closely as is practical to minimise signal skew SODIMM configuration prom reading is supported indirectly It is directly wired to a Coolrunner II CPLD U11 and can be accessed by the Spartan 3 FPGA via the CPLD Expansion Bus This feature is not automatically enabled when you Broaddown2 is delivered and you should contact support support enterpoint co uk if this feature is needed The LP2996 regulator will provide a 1 5 amp termination voltage at half the SODIMM main voltage input J8 allows the power input voltage of the LP2996 to be set to either 2 5V or 3 3V For DDR2 voltage levels operation the jumper should be fitted between pins 1 and 2 to select 2 5 V input supply To select the main SODIMM voltage rail please refer to the section on Bank Voltage Selection Enterpoint Ltd Broaddown2 M anual Issue 1 02 06 08 2005 PCI Edge Connector Bu SUITCH Figure 14 Broaddown2 PCI Interface Features WARNING BROADDOWN2 HAS BEEN DOUBLE KEYED TO ALLOW USE IN BOTH 3 3V AND 5V PCI SOCKETS IT IS POSSIBLE TO PLUG BROADDOWN2 INTO THE PCI SOCKET BACKWARDS OR DISPLACED IF A
12. Dl AITH PROSITE SOKET Figure 2 Front Side of Broaddown2 SOLDEF WOE BEYh SOLDEF prr E ao ees 3 ses Ta H3 RUE RTE basil ann g Fi n A We TA SBETE FES ETORS TE SOLOEF FRIOG HURE Figure 3 Back Side of Broaddown2 Enterpoint Ltd Broaddown2 M anual Issue 1 02 06 08 2005 Getting Started Your Broaddown2 will be supplied pre programmed with a test design A default setting of jumpers will also be fitted The test design will allow the user to determine that most ofthe major elements of the Broaddown2 are working To use this test you must do the following 1 Ensure that the LHS DIL Power Selector is set at the 3 3V position factory default 3 Connect the Broaddown2 to your power source un powered by the disk drive power connector or by plugging into a PCI slot within a Personal Computer un powered Please note that plugging into a Personal Computer should only be done by an experienced system administrator As with the addition of any new element to a computer there is a possibility that plugging your Broaddown2 into a computer PCI slot may cause data corruption or loss You should ensure that adequate backups of data or systems are made before attempting this step If you do not have a valid PCI supporting design loaded in the FPGA on the board it is likely to freezethe supporting computer 4 Switch on y our power source ae a as as as a
13. LACE HIGHLY FLAMABLE MATERIALS NEAR THESE DEVICES WHILST THE BROADDOWN2 IS IN OPERATION Enterpoint Ltd Broaddown2 M anual Issue 1 02 06 08 2005 Power Pickups Figure 5 Broaddown2 Power Pickup Points WARNING DO NOT CONNECT ANY VOLTAGE HIGHER THAT 3 3V TO THE SPARTAN 3 I O PINS TAKE GREAT CARE THAN CIRCUITS POWER ED FROM VOLTAGES HIGHER THAN 3 3V DO NOT DRIVE SIGNALS CONNECTED TO SPARTAN 3 TO A SIGNALLING VOLTAGE GREATER THAN 3 3V Broaddown2 has power pickup points Each pickup normally consists of a 3 pin 2mm header although some other types ofpick up are available on Broaddown2 The pinout of the 3 pin pickup points is usually defined as Pinl Voltage O P Pin2 Isolated Pin3 Gnd 0V In addition to these pickup points power can be picked up from LHS DIL Header RHS DIL Header Bank Voltage Selector J26 and Vref Voltage Selector J15 Please see the relevant sections for more details on these features Enterpoint Ltd Broaddown2 M anual Issue 1 02 06 08 2005 The voltages that are available on 3 pin pickup points are as in the following table LL O 12v 0 0 Bae 7 1 0 0 0 5 oo ov 3V JJ ee 0 0 0 4v pmo 93V jJL 398r iJ p 0 350 dL 4D 10r 0 0 0 0 o Fav BE 1 0 0 0 0 0 0 5 7 Lo 5v qu W m 5 0L i 5v tee Userl Rail J7 Potentiometer socket Pin2 not isolated
14. Please contact support if need to usethis service Other specialised warranty programs can be offered to users of multiple Enterpoint products Please contact sales on boardsales enterpoint co uk if you are interested in these types of warranty Enterpoint Ltd Broaddown2 M anual Issue 1 02 06 08 2005 Support Enterpoint offers support during normal United Kin gdom working hours 9 00am to 5 00pm Please examine our Broaddown2 FAQ web page and the contents of this manual before raising a support query We can be contacted as follows Telephone 44 0 1684 585262 Email supp ort enterp oint co uk Enterpoint Ltd Broaddown2 M anual Issue 1 02 06 08 2005
15. User2 Rail J6 Potentiometer socket Pin2 not isolated Rail may need to be turned on by CPLD output Enterpoint Ltd Broaddown2 M anual Issue 1 02 06 08 2005 Selecting FPGA Bank Vcciox Main SODIMM Voltages Broaddown2 divides the I O pins of the fitted Spartan 3 into 7 banks The FPGA does natively support 8 banks however on Broaddown2 banks 6 7 share their Vccio The key to voltage selection and hence support I O standards is header J26 From this header the 7 bank voltages and SODIMM main voltages can individually be selected from 3 V 2 5V and 1 8V Additionally 1 extra selection is available to each output power rail By soldering appropriate solder bridges SB170 185 1 2 V or 1 5V can be made available as levels It is also possible to set a custom level using a flying lead to the header but the voltage supplied should be the range 1 2 V to 3 45V Please note that the header is not pinned out the same way for each output power rail The pinout chosen makes it unlikely that input power rails can be shorted together using a single jumper The header layout and the nearby RHS DIL Power Selector are shown below lt oo lt d KEY Q DEFAULT JUMPER SETNC pas LE y Y inr Gas o V VOLTAGE SUPPLY P b re ev v VOLTAGE SUPPLY v VOLTAGE SUPPLY SOLDER BRIDGED VOLTAGE SUPPL E OUTPUT VOLTAGE RAIL peo o RHS DIL POWER SELECTOF boob mco 7 p f WS d Ent
16. addown2 Similarly the any position on the left column can be connected to Gnd If any of the solder bridges are made then the user should ensure that the Spartan 2 FPGA does not attempt to drive the relevant pin Failure to do so may damage the Broaddown2 The RHS DIL Power Rail can be selected by jumper to 3 3V 2 5V or 1 8V Alternatively other supplies can be connected to the selector by flying wire It is advised that voltages outside 0 to 3 3V are not used unless special precautions are taken to protect Spartan 3 I Os The Spartan 3 has an absolute input voltage rating of 4 05 V The pinout ofthe selection header is as follows obo Enterpoint Ltd Broaddown2 M anual Issue 1 02 06 08 2005 In the current version of Broaddown2 only the 31 pins ofthis header are available as active signals connected to the Spartan 3 These active signals are located on left column positions 2 to 16 counting from bottom and on the right column positions 1 to 16 counting from bottom The Spartan 3 pinout connections are shown in the following table as is LVDS pair support LEFT COLUMN RIGHT COLUMN LEFT RIGHT COLUMN SPARTAN SPARTAN COLUMN POSITION 3 PIN 3 PIN POSITION RHS DIL NOT USED 2 NOT USED NOT USED 2 3 NOT USED NOT USED 3 4 NOT USED NOT USED 4 5 NOT USED NOT USED 5 6 NOT USED NOT USED 6 7 NOT USED NOT USED 7 8 NOT USED NOT USED 8 9 NOT USED NOT USED 9 10 NOT USED NOT USED 10 11 NOT USED NOT USED 11 12 NOT USED NOT USED 12
17. cipal variants based on the size of FPGA fitted The Spartan 3 fitted can either be XC3S400 4FG456C XC3S1000 4FG456C or XC3S1500 4FG456C Should you need the faster 5 industrial or automotive grade FPGA s fitted to a board please contact Enterpoint sales for a quote In addition to these principal variants Broaddown 2 has build options for LVDS termination resistors and YFS connectors Please contact sales for a quote if you require these options Broaddown2 modules that are now available to purchase A D Converter DIL Header Module Low Cost Programming Cable Standalone SODIMM I O Expansion Module PCI I O Expansion Module RS232 Module RS485 Module US B2 Module LED 4 Segment Display Module PS2 Module Ethernet Phy Module AD7202 Module We can also offer custom DIL Header modules should you require a function not covered by our current range of modules Typical turn around for this service is 2 4 weeks if parts can be obtained in time Enterpoint Ltd Broaddown2 M anual Issue 1 02 06 08 2005 Finding Your Way Around DDR PLE FU DD BDk FOUERCONEUL PLAFO UR JF MEGATU VOLRA FE REGULA TOI SOCKET FROGEGUN FAS VOLTA COMMECTORE Un FIGURE COMM Eli UER ka CALE UMM Fi SELECTORE ECT DECT GLU FROS Akidi ia x QUE Yr 4 a CELELELE LE TL verse CEEE gE a d OON LEZETIJIITITI B CRETE ELEC LT LI Lette ddd THe oc mon ee HEL Hii T BH EDR EU CONMECTO CELA TO REGULA
18. e operated in simple inverting mode and do not offer much in regulation in this mode If you need tight regulation or low noise you should fit a post regulator to improve these parameters The LT 1054 regulators will deliver the approximate inverse of their input voltages Selection headers J31 and J32 allow the selection of 12V 5 V and 3V as input voltages by jumper Alternatively different voltages can be feed into the LT 1054 by fly ing wire to J31 J32 to give other voltages The LT 1054 fitted has a maximum input of 15V and a technical minimum of 3 5V Enterpoint has found that input voltages lower than 3 5V do work in practise but operation ofthe LT 1054 is not guaranteed at these levels The pinout of J31 and J32 is as follows CL Figure 11 Negative Voltage Regulators Input Selection J31 J32 J28 header allows the selection of voltages that are to be feed to the Moel Bryn expansion module This header also acts as a pickup point for these supplies and users can connect their fly ing lead connections to this header Enterpoint Ltd Broaddown2 M anual Issue 1 02 06 08 2005 SODIMM Socket m PLEHFU S00 Me UR S00 Ill H L SELECTOR 3 Figure 12 SODIMM Features WARNING DO NOT INSERT A DDR1 SODIMM INTO THE DDR2 SODIMM SOCKET IT WILL SHORT OUT THE POWER SUPPLIES CURRENTLY WE ARE NOT SUPPORTING MEMORY BASED SODIMMS IN THIS SOCKET THE DETAILS IN THIS SECTION ARE FOR YOUR INFORMATION ONLY Broaddown2
19. erface has no operation issues If you don t want to use the PCI Edge Connector for PCI and run Broaddown2 standalone y ou can use the Disk Drive Power Connector to power the board Usingthe optional PCI I O Expansion Module you can use PCI interface as general I O Figure 15 PCI I O Expansion Module If you need 5V input tolerant I O and don t need PCI then then using this module is an easy way of achieving this The Bus Switches on Broaddown2 fitted for 5V PCI tolerance work as well for general 5 V input signals The timing penalty i e through propagation of the Bus Switches is approximately 250 pico seconds Enterpoint Ltd Broaddown2 M anual Issue 1 02 06 08 2005 Right Hand Side DIL Header RHEL RHEL FERMER FALE L RHEL k He HEADI LEI k GH FOUIE COLUM COLI SELECT The RHS DIL Header provides a simple mechanical and electrical interface for add on modules The connectors on this header are on a 0 1 inch 2 54 mm pitch and allow either custom modules strip board or even dil style components 3 3V 2 5V only to be fitted The RHS DIL Header supports modules and comp onents with horizontal lead pitches of 0 3 0 4 and 0 6 inch pitches The header has a permanent positive power pin at the top position of the right column It also has Gnd 0V at the bottom of left column of the header It is also possible to connect any right column to the RHS DIL Power Rail by means of solder bridges on the back of the Bro
20. erpoint Ltd Broaddown2 M anual Issue 1 02 06 08 2005 Selecting FPGA Vref Voltages Broaddown2 primarily supports Vref voltages for banks 2 3 and 4 It is these banks that connect to the DDR2 SODIMM module It may be possible to apply Vref for other banks using flying wires but please check with support before attempting this The selection of Vref is carried out on header J15 Each of banks 2 3 4 can be connected by jumper to the reference voltage supplied by thepush pull LP2996 regulator This regulator generates a reference voltage half that of its input reference voltage which is the SODIMM main supply rail Please note that jumper setting of J8 will affect the range with which the LP2996 will regulate For details of this please refer to the LP2996 datasheet As an alternative the USERI power rail can be used as a reference but this will not track the SODIMM main voltage rail V USERI can be set within the range of 1 22V to 3 3V approximately by fitting a potentiometer or resistor in socket position J7 between pins 2 and 3 A spare selector is included on J15 should you need to pickup the LP2996 reference voltage J15 also allows the grounding of Vref inputs to the FPGA should y ou need to do this The pinout of J15 is shown below KEY d P Y OT o DEFAULT JUMPER SETTING 9 e L 288 REFERENCE VOLTAGE 9 eo USEF VOLTAGE x is 1606 on a e e ar OUTPUT J8 should also normally be set to the 2V5 setting for DDR2
21. has a DDR2 SODIMM socket allowing the fitting of a I O expansion module Figure 13 SODIMM I O Module The SODIMM I O M odule can also be used to support loopback testing of the SODIMM Socket when used in conjunction with a suitable test build loaded into the Spartan 3 FPGA The SODIMM Socket is keyed and will only support DDR2 style SODIMM modules DDR2 SODIMM module pinout is incompatible with DDR1 SODIMM pinout Do not remove the Enterpoint Ltd Broaddown2 M anual Issue 1 02 06 08 2005 mechanical key to allow DDR1 modules to fit If non memory modules are fitted then the Socket can supply alternative voltages of 3 3V 2 5 V or 1 8V by jumper selection Other voltages available by flying wire Please note that the relevant Spartan 3 Bank voltages should be set appropriately for whichever voltage is used In addition do exceed the Spartan 3 maximum I O voltages A 0 to 3 3V signalling 4 05 V absolute max is the maximum normal range of signalling that Spartan 3 can tolerate When used for a DDR2 currently not supported memory function the following signal features are available 1 32 bit data upper 32 bit not available 2 A0 TO A13 address 3 BAO to BA2 bank address 4 DMO to DM3 5 CKO CK 1 6 CKEO CKEI 7 RAS 8 CAS 9 CSO CSI Because the data bus has been narrowed from 64 bit to 32 bit any standard DDR2 SODIMM fitted with effectively only have half its stated capacity Peak data rate of 200 MHz
22. ike this Mo IFYNLDOL AD ED IT LOWERCONTR FGONMETOS CH TO y pro gt IREM I y SHARES SERIAL FRAICHE SODRNUGERLA FF TRAPS HG IND DE ag A A A cH om ai Ta cH Tu Figure 7 CPLD JTAG Chain The FPGA chain looks like this FHL FITTEL ANSE ESRI CY i LA m 18 H PTS 2 I ERR Rs JRGCOMECTR mi MOULE ARE y nani RAT ES X UE w mm vro TM wn E oF WE mum w m 1L 1L Figure 8 FPGA JTAG Chain If a Moel Bryn module supporting a JT AG programmable device is fitted then jumper J14 should be removed Programming of the Spartan 3 FPGA can be achieved by direct JTAG programming or from the Platform Flash memory s By default the Spartan 3 devices is programmed from the Platform Flash memories at power up However the default configuration mode can be altered by reprogramming the Coolrunner II CPLDs on Broaddown2 Direct JTAG programming is volatile and the FPGA will lose its configuration every time the board power is cycled From sustained use of FPGA design programming the design into the Platform Flash memory is recommended Generation of suitable Platform Flash content files and control of the JT AG chain can be achieved using the XILINX ISE tool IMPACT Enterpoint Ltd Broaddown2 M anual Issue 1 02 06 08 2005 Primar
23. nd thence on part ofthe Card Edge Connector and LHS DIL Header Enterpoint Ltd Broaddown2 M anual Issue 1 02 06 08 2005 FPGA FODER CONTEC CFLD JTAG CFLD FOUIER PROGRAMM F CONMEC T REGULA DRE CODLRUMNNEI LI Li Li L E H L L i i i i i Figure 16 Broaddown2 FPGA Broaddown2 supports Spartan 3 devices in the FG456 package Broaddown2 is normally available with commercial grade and 4 speed devices fitted in three sizes XC3S400 XC3S1000 and XC3S1500 Should you have an application that needs industrial or faster speed grades please contact sales for a quote at boardsales enterpoint co uk Broaddown2 has two Platform Flash sites supporting XCF02 and XCF04 devices in a daisy chain configuration These sites allow a programming capacity of between 2 and 8 Mbits The size and number of devices fitted will depend which variant of Broaddown2 is ordered Simple switch S1 is fitted as a reset This is connected to one of the TPS70402 regulators U14 where a de bounced and lengthened output pulse on signal RESET N is generated RESET N is connected to one of the Coolrunner II CPLDs U9 If this switch is needed to control a function or reset in the Spartan 3 FPGA then please use the Expansion Bus to relay the switch status to the FPGA Otherwise the PCI reset signal is connected to the Spartan 3 FPGA and can be used for reset purposes The two oscillator sockets on Broaddown2 support 5V 8 pin
24. ng of wake up power systems is possible For wake up it is possible to use one of the clock inputs to the CPLDs derived from the oscillator sockets on Broaddown2 to switch on the regulators for Spartan 3 FPGA Enterpoint Ltd Broaddown2 M anual Issue 1 02 06 08 2005 Medical and Safety Critical Use Broaddown2 is not authorised for the use in or use in the design of medical or other safety critical systems without the express written person of the Board of Enterpoint If such use is allowed the said use will be entirely the responsibility ofthe user Enterpoint Ltd will accepts no liability for any failure or defect of the Broaddown2 or its design when it is used in any medical or safety critical application Enterpoint Ltd Broaddown2 M anual Issue 1 02 06 08 2005 Warranty Broaddown2 comes with a 90 return to base warranty There are a number of places that Broaddown2 can be soldered by a user We have sited these on the back of the board to avoid damage to other components when solder bridges are made However do not attempt to solder connections if you are not competent to do so Enterpoint reserves the right not honour a warranty if the failure is due to poor soldering technique or other maltreatment of the Broaddown2 Outside warranty Enterpoint offers a fixed price repair or replacement service We reserve the right not to offerthis service where a Broaddown2 has been maltreated or otherwise deliberately damaged
25. operation This will allow generation of a reference voltage of 0 9 V when the main SODIMM power rail is set to 1 8V Enterpoint Ltd Broaddown2 M anual Issue 1 02 06 08 2005 Programming Broaddown2 POWER CONTROL PLATFORM JTAG JTAG PROGRAMMNG FLASH CONNECTOR CONNECTOR COOLRUNN ER II FPGA FPGA CPLD CPLDS PROGRAMMING SPARTAN 3 FPGA Figure 6 JTAG Connector Positions The programming of the FPGA CPLDs and Platform Flash parts on Broaddown2 is achieved using JTAG chains Principally it is anticipated that a JT AG cable will be used in conjunction Xilinx ISE software although other alternatives do exist including self re programmin g There are 2 JT AG chains on Broaddown2 The first chain allows the programming of the three Coolrunner II CPLDs Normally users will not need to reprogram these devices However to use special power sequencing and or advanced programmin g features reprogramming of these devices may be needed If you are considering using these features you should study the Broaddown2 circuits and understand the full functionality before modifying the CPLD programmin g The second JT AG chain allows the programming of the Spartan 3 and Platform Flash devices as well as the a Moel Bryn expansion card if fitted Each JT AG connector has a layout is as follows BOARD TO E MIB y PCICONNECTOI Enterpoint Ltd Broaddown2 M anual Issue 1 02 06 08 2005 The CPLD chain looks l
26. td Broaddown2 M anual Issue 1 02 06 08 2005 Secondary Power Regulators m PBDEHFU SOD ilo UR S00 kidhi H FOLIEF REGULA TO SOCKET SELECTOR SELEC TOF p a L E s L L D k 1 b i i Figure 10 Secondary Power Regulators Broaddown2 has a number of secondary regulators These regulators are derived from twin regulator devices TPS70402 These regulators will deliver 1 or 2 amps depending on which section of the TPS70402 is being used The following voltage rails are derived usin g these regulators VOLTAGE DEVICE CURRENT RATING O P SERIES RESISTOR Vecaux SPARTAN Vecini SPARTAN 3 Current measurement can be achieved by replacing a zero resistor with a low ohm sense resistor where the above table indicates a suitable resistor position A separate TPS70402 U14 is also fitted to Broaddown2 for the supply ofthe Coolrunner Il CPLDs This device operates independently ofthe main and secondary regulator chains As these regulators are variable regulators rail voltages can be modified to suit particular voltage applications if necessary The minimum that the TPS70402 will regulate to is 1 22V Enterpoint Ltd Broaddown2 M anual Issue 1 02 06 08 2005 Negative Rail Generation Selection Broaddown2 has 2 inverting LT 1054 charge pump regulators fitted Each regulator will deliver about 100 mA and the two outputs can be connected together to give a single 200 mA supply The regulators ar
27. y Voltage Regulators m PBDEHFU S00 khi UR S00 kidhi H FOLIEF REGULA TO SOCKET SELECTOR SELEC TOF PP EE i i t i Figure 9 Primary Power Regulator Fea tures Broaddown2 has a power backbone based on four TPS75901 linear regulators These regulators are capable of delivering 7 5 amps The structure of these four regulators is a semi chain so that effectively all the current taken out of the chain passes through the top regulator 4 1V and any intermediate chain regulators Therefore the absolute maximum current that can be delivered into Broaddown2 is limited to 7 5 amps The output voltages of this chain are 4 1 V 3 3 V 2 5V and 1 8V Practically the current delivered by the regulator chain will be limited by the RGES00 reset able fuse that is fitted on SV input to the regulator chain From practical experience and testing the following total current can be delivered in the primary regulators under the following cooling conditions Approximate Board Input Current Limit No Forced Cooling Simple Fan Fitted To Mounts Special Cooling With the exception of the 4 1 V regulator each Primary Regulator has a zero ohm resistors on input supply and on regulator output It is possible using these resistors to break the chain to allow measurement of individual currents These features can also be used where more complex power sequencing needs to be modelled or if a switching regulator input needs to be substituted Enterpoint L
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