EK-LM3S3748 - Texas Instruments
Contents
1. 45V R22 47 ES 433V 1 gj LED K e LED A 433v D2 D3 1 R43 QA T 1 44 GND Reset 100K BACKLIGHT i 006322 b Cn 5 SWI 333V a 520 MBR0520 4 RESET SWn 0 1UF SW B381000 2 _ _ RESB LCD 0 ip Dn LCD WR WRn TESTI LCD RD ME D7 4 way Navigation Switch 5 Jl iQ Q2B m Mir gt FFDG6322C SPKI FDG6322C C D Up m D4 3 gt 2 D3 Right D2 00 6 RIGHT SWn DI 2 Down e co 4 j e o DOWN SWn 2 QA NO S Left Hoo LEFT SWn 22 SOUND Select CI8 C21 RIS LCDI0 7 LCD KWHOISCOA F01 L o 5 SELECT SWn d 0 1UF 0 1UF 100K TPASIIGLES n a 128x128 CSTN LCD Graphics Display 4 1 4 n User Switches Audio Amplifier 3n TEST2 R16 E 1 7 RI8 _ CARDCSn i LED 330 CARDRX i 433V W ni CARDCLE 5 2908 05WB MG Status 4 CARDTX i 19 R4 DBGOUTLED AN AINAP gt 100K 0 1 Ww NS Debug Out Red microSD Card Slot PT 10K 0 1 RS AW AINAM gt 330 100K 0 1 LED3 power ower VRHLSV 15v NN Green U AINBP FANADMISSX LC20 jRi42. 9 Figure 1 2 LM3S3748 EVB Block 11 Figure 2 1 Oscilloscope Acceptable Measurement 21 2 2 Oscilloscope Connection u u itte trn e ere Ere vo t v p eie e Pe reat 21 Figure 2 3 ICD Interface 24 Figure 1 LM3S3748 Evaluation Board Component 32 Figure B 2 LM3S3748 Evaluation Board Dimensions nennen nennen 33 Figure D T DG Power Jack iiss ce irn uie e cenas vede ge te aea a ee eed 40 January 6 2010 5 January 6 2010 Stellaris amp LM3S3748 Evaluation Kit List of Tables Table 271 Board Power Options 5 2 daniel hav eee eee 16 Table 2 2 USB Related 16 Table 2 3 0 353748 EVB Hardware Debugging Configurations sees 17 2 4 Debug Related Signals ier nie eet ED it EE a yapa 18 Table 2 5 LCD Related 50 19 Table 2 6 Oscilloscope Electrical 20 Table 2 7 Speaker Related Signals
3. nns nnne nen 22 Table 2 8 Navigation Switch Related 0 23 Table 1 1 353748 Bill of 35 D t VO Breakout Pads t e te GR e em pta se dde 39 Table D 2 Target Pilout nuc ie o rette tere tete eto seu EE Led ye a Ero Sp ove 40 Table 0 3 Oscilloscope Header 40 January 6 2010 7 January 6 2010 Stellaris LM3S3748 Evaluation Board The Stellaris amp LM3S3748 Evaluation Board EVB is a compact and versatile evaluation platform for the Stellaris LM3S3748 ARM Cortex M3 based microcontroller The evaluation board design highlights the LM3S3748 microcontroller s key features including USB 2 0 full speed 12 Mbps controller Analog to Digital Converter ADC and serial interfaces The LM3S3748 EVB has connectors for both embedded USB Host and USB Device operation allowing a range of USB application options to be evaluated In USB Device mode a small switch selects between bus powered and self powered options Four ADC signals are paired as two differential channels to implement a 1MS s oscilloscope application on the LCD panel The oscilloscope feature set includes USB host and device connectivity as well
4. 15 act 15 Power Supplies tte teet bci ueste etes dete RE 15 USB cube det dee Dn AED cm dace Mk ce 16 DEBUGGING 17 Debugging EE eee entitatem petes eite 17 Deb g Im Considerations 17 usa H 18 PAG SWD octets a 18 OM et etim rebote e dee 18 Serial Mire cub eds 18 euge E 19 reiecit teet atate eiut le arbi deiade 19 Control ec 19 RE 19 oer TELE 20 ne 20 Moltage Refereriee s iin eer cd 20 Differential Inputs LA eene ege e en 20 Test SighalSy unu oet te ERG ERU UR Isai Last octo ee 21 Optimizing the 04 000000 senes sinn nennen 21 Other Beripherals ta eda etie oer t 22 at on ite eo eu Lt betae oa 22 Navigation Switch rep eie eee e eta e ep Huge Dd x De eR oe 23 LED RC
5. DEVICE 5V T 3 SW3 Us gt o i 45V PQILA333MSPQ i penis 5 R38 T S 100K 2 5555820201 036 HIBn D4 Main 3 3V 200mA Power Supply MBR0520 R44 0 Ohm 07 VBUS TPS2051BDGN 5VIN apes our L IN OUT 4 C39 USBOEPE EN 2 Z Me USBOPFLT 330m pu R39 100K VBUS Fault Protected Switch 43 3V D7 VBAT 27728 R42 15K BTI OMIT 3V Coin Cell Hibernation Battery not installed HOSTEn USBDP USBDM VBUS USB HOST 154 UAR42 E USB DEVICE 54819 0572 DEVICE SV Omit Joo D9 433V VBUS TPD2EO0IDRL l GND n 9 o A ava 19 5 vec 144 cy lt 2 s 1 D DL D2 49 D GND 5 598 FSUSBIIMTCX HOSTEn Low USB Host selected HOSTEn High USB Device selected DEVICE 5V R40 Omit USBOVBUS R41 Omit D10 0 1UF TPD2E001DRL 9 1 z HAH VCC GND Host Device Selector 45 Texas INSTRUMENTS Drawing Tite Stellaris USB Host Device Eval Board Page Title Power USB Selection Size p Document Number M3S3748 Date Sheet Rev 7 3 2008 2 of 4 A gt
6. GE Hibernate 100K 0 1 O 1UF 100 Status LEDs 0 1UF 2 5 Q3B CON HDR 1X8 P100 FDG6322C R7 m AN AINBM gt Bes j 100K 0 1 TEXAS INSTRUMENTS 2 Channel Oscilloscope Drawing Tite Stellaris USB Host Device Eval Board Page tite LCD Switches and Audio Hibernate Mode Indicator Size Document Number 11393748 Date 7 3 2008 Sheet 3 c4 Rev A gt 6 Debug Interface Logic PLD PLD TMS PLD TDI P5 Qu PLD JTAG TEST POINTS n Debugger USB Interface PLD TDO Qo 54819 0572 3 3V 3 9 43 3V s 433V ss Pe 031 USB Device Controller 0 1UF MYEL LCAQ32 TSTNASC R29 56 DBG 5V n 5 898922 55 d 7 44 21 555 INT 4s AU GOEO BO ADBUSO S53 TDUDI 46 Al Bl 3V30UT ADBUSI A2 B2 Een TDO DO zu ipa R37 TMS OUTEN 48 Bi 47K USBDM ADBUs4 20 el AS B5 MAROETCABLEN 4 ADBUSS 49 S
7. Keil RealView Microcontroller Development Kit MDK ARM AR Embedded Workbench January 6 2010 11 Kit Contents Code Sourcery GCC development tools Code Red Technologies development tools Texas Instruments Code Composer Studio IDE Complete documentation Quickstart application source code Stellaris Firmware Development Package with example source code Evaluation Board Specifications Board supply voltage 4 85 5 25 Vdc from one of the following sources Debugger USB cable connected to a PC Device USB cable connected to a PC DC power jack m Board supply current 130 mA typ fully active CPU at 50 MHz no audio Break out power output 3 3 Vdc 100 mA max Speaker power 0 3 W max Dimensions 4 65 x 2 45 x 0 33 L x W x H RoHS status Compliant When the EVB is used in USB Host mode the host connector is capable of supplying power to the connected USB device The available supply current is limited to 250 mA unless the EVB is powered from an external 5 V supply with gt 600 mA rating Microcontroller Features 12 LM3S3748 microcontroller includes the following product features 32 bit RISC performance using ARM v7M architecture 50 MHz operation Hardware division and single cycle multiplication Integrated Nested Vectored Interrupt Controller 37 interrupt channels with eight priority levels 12
8. 4 GND 5 Test Point 2 Wire this pair 6 Channel 2 7 Channel 2 Wire this pair 8 GND January 6 2010 Stellaris amp LM3S3748 Evaluation Kit 41 Oscilloscope Header Pinout 42 January 6 2010 References In addition to this document the following references are included on the Stellaris LM3S3748 Evaluation Kit documentation CD ROM and are also available for download at www ti com stellaris Stellaris LM3S3748 Evaluation Kit Quickstart Guide for appropriate tool kit see Kit Contents on page 11 Stellaris LM3S3748 Evaluation Kit Read Me First StellarisWare Driver Library User s Guide publication number SW DRL UG Stellaris LM3S3748 Microcontroller Data Sheet publication DS LM3S3748 Additional references include Formike Electronic KWH015CO04 F01 LCD Display Data Sheet gm Sitronix ST7637 Color LCD Controller Driver Data Sheet W Future Technology Devices Incorporated FT2232D Data Sheet Information on development tool being used RealView MDK web site www keil com arm rvmdkkit asp AR Embedded Workbench web site www iar com Code Sourcery GCC development tools web site www codesourcery com gnu_toolchains arm Code Red Technologies development tools web site www code red tech com Texas Instruments Code Composer Studio IDE web site www ti com ccs January 6 2010 43 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries TI reserve the right to
9. This appendix contains the following sections Breakout Pads see page 39 DC Power Jack see page 40 ARM Target Pinout see page 40 Oscilloscope Header Pinout see page 40 Breakout Pads The LM3S3748 EVB has 55 I O pads and 13 power pads for a total of 68 pads Connection can be made by soldering wires directly to these pads or by using 0 1 pitch headers and sockets NOTE In Table D 1 an asterisk by a signal name also on the EVB PCB indicates the signal is typically used for on board functions Normally you should cut the associated jumper JP1 30 before using an assigned signal for external interfacing Table 0 1 I O Breakout Pads Description rar Description Description Ads Description GND 34 PB7 NMI 33 GND 68 DBG 5V 67 6 32 GND 31 VBUS 66 PA3 SSIOFSS 65 PB6 CO 30 4 29 PB5 C1 64 2 63 PE2 SSHRX 28 PE3 SSI1TX 27 PC2 TDI 62 PC3 TDO SWO 61 PD4 ADC7 26 PD5 ADC6 25 PH1 CCP7 60 PAO UORX 59 PD6 ADC5 24 PD7 ADC4 23 PE1 SSI1FSS 58 GND 57 PE7 ADCO 22 PE6 ADC1 21 PB2 I2COSCL 56 PEO SSHCLK 55 PE5 ADC2 20 4 19 GND 54 PGO PWMA 53 PDO IDXO 18 PD1 PHAO 17 PBS3 I2COSDA 52 PG3 FAULT2 51 PD2 CCP5 16 15 PF1 PWM1 50 3 3V 49 PG2 14 PG1 PWM5 13 PFS PWMS 48 PF2 PWMe 47 PC7 U1TX 12 PC6 U1RX 11 VBAT 46 PF2 FAULTO 4
10. so these signals are usually not necessary It is recommended that connections be made to all GND pins however both targets and external debug interfaces must connect pin 18 and at least one other GND pin to GND Some external debug interfaces may require a voltage on pin 1 to set line driver thresholds The EVB ICDI circuit automatically sets pin 1 high if an external debugger is connected In other modes this pin is unused January 6 2010 Schematics This section contains the following schematic diagrams for the LM3S3748 evaluation board Microcontroller page 26 Power USB Selection on page 27 LCD Switches and Audio on page 28 Debugger Interfaces on page 29 JTAG Logic with Auto Mode Detect Hibernate and TVcc Control on page 30 January 6 2010 gt Break out Headers On board LCD Signals Stellaris LM3S3748 Microcontroller 34 33 68 67 PH2 controls USB mux and input per errata Jumpers can be cut to PBO to HOSTEn connection required for Rev 0 silicon 4 4 free GPIO lines if required PH2FAULT3 PB CO 28 PB4 CO d VBUS iae S PH2 FAULT3 U OS 5 PEZ SSIIRX
11. 23 Interfacing tothe EV Bi u u 23 Bypassing Peripherals ss tinet De Fc bei e ca A E Lee i edet 23 In Circuit Debugger 23 5 2222 200 LC M 25 Appendix Bz PCB u uum ana u esie T i Lester Tere ier dore is asa 31 Gomponent Locations rei erret err etna te t n gel ene c fes Sek ye eue tea 31 Evaluation Board Difmerisioris s tte i Det are iie e ue i ee ioter Pre Seo 33 Appendix C Bill of Materials BOM 1 U U u uuu uu u uu 35 Appendix D Connection Details J l u u uu uu uuu uu u u 39 Breakout Pads 5 6 ukuna e t net t 39 January 6 2010 3 T REOS 40 ARM Targat e D as S 40 Oscilloscope Header Pinout er n dato dace ei ea evade aar e bd dac 40 Appendix E Refererces A iii EIL ea kaswan 43 4 January 6 2010 Stellaris amp LM3S3748 Evaluation Kit List of Figures Figure 1 1 LM3S3748 Evaluation
12. Resistor 47 Ohms 596 Panasoni Digikey P47GCT ND 0603 R24 R27 R42 3 ERJ 3GEYJ152V Resistor 1 5K 596 0603 Panasoni Digikey P1 5KGCT ND R25 R26 R32 7 ERJ 3GEYJ270V Resistor 27 Ohms 596 Panasoni Digikey P27GCT ND R33 R34 R35 0603 R36 R29 R30 R37 3 ERJ 3GEYJ472V Resistor 4 7K 5 0603 Panasoni Digikey P4 7KGCT ND R3 1 ERJ 3EKF9101V Resistor 9 10K 196 0603 Panasoni Digikey P9 1KHCT ND R4 R5 R6 R7 4 ERA 3AEB104V Resistor 100K 0 1 Panasoni Digikey P100KDBTR ND 25ppm 0603 R8 R9 R10 4 ERA 3AEB103V Resistor 10K 0 1 25ppm Panasoni Digikey P10KDBTR ND R11 0603 SPK1 1 NDT 03C Speaker 8 ohm 0 3W Star Hawk NDT 03C Surface mount Micronics SW2a 1 TPA511GLFS Switch 4 way Navigation C amp K Digikey 401 1130 2 ND SMT w select SW2b 1 BOUTON TPA Cap for Nav Switch Black C amp K Digikey 401 1997 ND 36 January 6 2010 Table 1 LM3S37468 of Materials Continued Stellaris amp LM3S3748 Evaluation Kit Reference Qty Part Number Description Mfg Supplier Stock No SW1 1 B3S 1000P Switch Momentary Tact Omron Arrow SW415 ND 160gmf 6mm Future U1 1 1 353748 Microcontroller ARM Luminary Luminar 1 353748 Cortex 100 02 1 4174155 NL Op amp Rail to Rail Fairchild Mouser 512 4174155 SOT23 5 U3a 1 KWH015C04 F01 LCD Module 128x128 Formike Wan KWH015C04 F01 1 5 Display Display U3b 1 SF
13. are important in defining the maximum voltage between the inputs to each channel 11 16 5 Table 2 6 Oscilloscope Electrical Specifications Parameter Name Min Nom Max Units Common Mode Input Voltage 16 5 16 5 V Differential Input Voltage 16 5 V Differential Input Voltage 16 5 V Input Impedance 220K Q January 6 2010 Stellaris amp LM3S3748 Evaluation Kit Figure 2 1 Oscilloscope Acceptable Measurement Range nem ener ene ementi Acceptable measurement range Min Max Test Signals The oscilloscope inputs may be used to measure voltages and waveforms at various points on the board Consider the oscilloscope s input impedance 220 when selecting signals to measure The EVB has two defined test points that can be easily accessed on the oscilloscope header Figure 2 2 Oscilloscope Connections Test Ground Test Point 2 Channel 1 Channel 2 Channel 1 Channel 2 Test Point 1 i Test Ground 14 14 The oscilloscope test leads included in the evaluation kit have pin sockets that are compatible with a wide range of test probes clips and hooks that have 0 025 square terminal posts Optimizing the Oscilloscope The oscilloscope hardware is a simple design that balances trade offs between input impedance signal bandwidth and measurement error January 6 2010 21 Other Peripherals Measurement error is introd
14. 5 PC5 C1 10 PC4 CCP4 9 GND 44 GND 43 PA1 UOTX 8 PA2 SSIOCLK 7 GND 42 PFO PWMO 41 PA4 SSIORX 6 PA5 SSIOTX 5 PF6 CCP1 40 PF5 CCP2 39 PA6 I2C1SCL 4 PA7 I2C1SDA 3 PG4 CCP3 38 PF7 PHBO 37 PG7 PWM7 2 GND 1 PG6 PWM6 36 PG5 FAULT1 35 January 6 2010 39 DC Power Jack DC Power Jack The EVB provides a DC power jack for connecting an external 5V regulated 5 power source as shown in Figure D 1 Figure D 1 DC Power Jack Center Positive The socket is 3 5 mm dia with a 1 3 mm pin Suitable plugs include CUI PP3 002D ARM Target Pinout In ICDI input and output mode the LM3S3748 Evaluation Kit supports ARM s standard 20 pin JTAG SWD configuration The same pin configuration can be used for debugging over serial wire debug SWD and JTAG interfaces see Table D 2 Table D 2 ARM Target Pinout Function Pin Pin Function VCC optional 1 2 nc nc 3 4 GND TDI 5 6 GND TMS 7 8 GND TCK 9 10 GND nc 11 12 GND TDO 13 14 GND nc 15 16 GND nc 17 18 GND nc 19 20 GND Oscilloscope Header Pinout Table D 3 shows the header pinout for the oscilloscope Table D 3 Oscilloscope Header Pinout Pad No Description Test Wiring 1 Test Point 1 Wire this pair 2 Channel 1 40 January 6 2010 Table 0 3 Oscilloscope Header Continued Pad No Description Test Wiring 3 Channel 1 Wire this pair
15. 8 KB single cycle flash 64 KB single cycle SRAM Pre programmed ROM DMA controller Two SSI modules One USB Host controller Four general purpose 32 bit timers Two fully programmable 16C550 type UARTs Eight 10 bit ADC channels inputs when used as single ended inputs January 6 2010 Stellaris amp LM3S3748 Evaluation Kit Two integrated analog comparators Two 12 modules Four PWM generator blocks One QEI module with position integrator for tracking encoder position 3 to 61 GPIOs depending on user configuration On chip low drop out LDO voltage regulator Hibernation module January 6 2010 13 Kit Contents 14 January 6 2010 Hardware Description In addition to a microcontroller the Stellaris amp LM3S3748 evaluation board includes a range of useful peripheral features and an integrated in circuit debug interface ICDI This chapter describes how these peripherals operate and interface to the microcontroller LM3S3748 Microcontroller Overview The heart of the EVB is a Stellaris 0 353748 Cortex M3 based microcontroller The LM3S3748 microcontroller offers 128 KB flash memory 64 SRAM memory 50 MHz operation USB and a wide range of peripherals See the LM3S3748 microcontroller data sheet order number DS LM3S3748 for complete device details The LM3S3748 microcontroller is factory programmed with a quickstart demo program The quickstart program resides in on chip flash memory and runs eac
16. CD3 PC3 TDO SWO 55 PC3 TDO SWO PD3 CCP0 Beas JP26 SoS 4 4 PD4 ADC7 N PG4 CCP3 PCS CI 24 98 PDS ADC6 o PCQUIRX 33 PCSICI PDS ADC6 55 BDS ADCS JP27 23 BceuIRX PDSADCS 99 PDS ADCS CO no PGS FAULTI 22 Pp7 Apca 100 PD7 ADC4 lt 1006 PEOSSIICIK 78 pEO SSIICLK propwmo 47 PEYPWMO Oscilloscope Signals On board Peripheral Signals 25 PG7 PWM7 2 55 95 SSUES 60 PF2 PWM2 Jumpers can be cut to Jumpers can be cut to S LCD PESSSIITX 96 2 58 PEXPWM2 c59 PESPWND PRA ADCS 6 PE3 SSIITX PF3 PWM3 8 PF4 FAULTO free GPIO ADC lines if required free GPIO lines if required PESADOS PEA ADC3 PFA FAULTO ESC gt PES ADC2 PF5 CCP2 PFCC 5 JP12 PEG ADCI PF6 CCPl Sra PE7 ADC0 PAO UORX r 0 Pr7 Phpo 42 een ST O0 VCP 2 6 JP25 PGUPWM4 19 86 _ PHO CCP6 PEG ADCI PAI UOTX PGIPWMS _ 18 E Me ACCES 85 __ 7 TOTE AINAM 175 84 PH2 FAULT3 ig PG PH2 FAULT3 jy PES ADC2 ATNBP PGVCCPi g1 PH3 USBOEPEN USBOEPE 9 20 USED PGSFAULTI ag PG4 CCP3 PH4 NMI USBOPELT USBOPFLT VASA PANSSICLK 0 CARDCLK PGPWMS 37 PGS FAULTI 0 PGGPWMG PA3 SSIOFSS y CARDCSa POIPWMI 56 PG7 PWM7 n OSCO USBODP PA4SSIORX l
17. PE3 SSIITX PC2 TDI PC3 TDO SWO JP30 PDA ADC7 55 PDS ADC6 PHI CCP7 PCA CCP4 26 66 PDG ADCS PD7 ADC4 PEI SSIIFSS LCD WR 27 67 Ad PE7 ADCO PEG ADCI PBIDCOSCL 99 PEU SSIICLK CD RD 5 PAJ SSIOCLK 28 572 PBZDCUSCL PES ADC2 o PEA ADC3 al S PGO PWM4 PASSSIUFSS 29 b vesIQESS PBS DCOSDA 63 2 5 PDU IDXO 55 PDI PHAO PBYDCOSDA oo PG3 FAULT2 2 2 08 PAA SSIORX 30 PpA CO 392 PBA CU j AN 5 PD3 CCP0 PFUPWMI 56 PAS SSIOTX 291 PBS CI n PG2 56 5 PF3 PWM3 2 12 PAZDCISCL 3 3 lt im S Q PASDCISCL 34 PAGIDCISCL PB6 CO 30 0 Ohm to 14 PAT DCISDA PB7 NMI Gp PGUPWMS PAI UOTX PA2 SSIOCLK 56 JP17 INT TCK 50 PCO TCK SWCLK L0 PDOIDXO jumpered to 5V per Rev 0 errata PG2 lt 79 PDI PHAO PAG I2CISCL PAT DCISDA PGA CCP3 PF7 PHBO quem TMS SWDIO PC2 TDI PCUTMSISWDIO PDI PHAO 315 5 PG7 PWM7 oo PG6 PWM6 PGS FAULTI 8 8 4 PC2 TDI PD2 CCPS x 5 1 2 12 r Z PG3 FAULT2 5 77 13 PD3 CCPO L
18. R40 509 GND 5V GND 2 0805 SSIOFSS B c PH2 OSCILLOSCOPE 0 ___ ssury 0 LUMINARYMICRO C PC 1 353748 UORX fi R3 SSIIFS GND ADC Re CLO SSIICLK ADC3 C7 GND PWM4s c5 R2 PHAO SDAO cepo 3 3V PWM5 bw PWM2 UIRX 5 8 4 cepa 2 GNDx3 SSIOCLK PWMO SSIOTX CCP2 1201 SDA 0 DEBUG Cote DEBUG we NAVIGATE STATUS 007 JTAG SWD 652 DEBUG INTERFACE R12 R15 R21 January 6 2010 32 Evaluation Board Dimensions Figure 2 LM3S3748 Evaluation Board Dimensions 4 65 Stellaris amp LM3S3748 Evaluation Kit 244 5 wcs R40 HH January 6 2010 ADC1 fil 7 PHAD 2 ccpo 2 PWNS uRx 2 SSIOCLK 5507 1201 SON Es GND 0805 Cl 0 L LUMINARYMICRO C LM3S3748 EVB c SSHFS u SCLO cu m Y io iB ze 4 to ON Bn PWR 1 50 UORX GND SSITCLK 3 3 4 GNDx3 CCP2 R12 R15 821 1 04 Rig el DEBUG STATUS our 33 Evaluation Board Dimensions 34 January 6 2010 of Materials Table C 1 p
19. RSTN 4 3 A6 Bank 0 Bank 1 B6 USBDP ADBUS6 F 2 B7 DBG JTAG EN 7 us 15 so 9 B9 ACBUSO RESET SWn 10 52 10 ACBUSI Wu ACBUS2 41 12 12 ACBUS3 CENT E 558 S WUA v 9 wen TPD2E001DRL lt lt lt gt 6 mmm BDBUS0 VCP RX R30 a BDBUSI sse BDBUS2 pee R23 04 SWO EN T 10K as BDBUS4 c32 t H cs 17 EECS BDBUSS ule s e SK FG gt EESK BDBUS6 SE ORG DI EEDATA BDBUS7 s GN GND TEST 2 CATOCAE BCBUSO 8 CAT93C46 XTIN F 22 MODE XTOUT BCBUS2 2 VCP TX SWO S WUB MODE is reserved for future use nie RSTOUT PWREN AA x C25 C26 Bd GND R32 LUN 27 27 GND 333v A JTAG SWD Interface GND VCCIOA I nput Output i GND yacon C30 C33 C34 R33 PC2 TDI 0 1UF 0 1UF 0 1UF 2 R34 1192525 gt t o TusSwpgioy n Channel JTAG SW Debug R35 Channel Virtual Com Port 27 R36 PC3 TDO SWO AW 27 CON HDR 2X10 P100 B 1 el 45 Texas INSTRUMENTS 7 Drawing Title F 9 91 5 9 1 Stellaris USB Host Device Eval Board Page Title BINE CONHDR 2X5 050 Debugger Interfaces Size Document Number Fine pitch JTAG SWD BD LM383748 Date 7 3 2008 Shee
20. Stellaris amp LM3S3748 Evaluation Kit User s Manual 4 TEXAS INSTRUMENTS EK LM3S3748 05 Copyright 2008 2010 Texas Instruments Copyright Copyright 2008 2010 Texas Instruments Inc rights reserved Stellaris and StellarisWare are registered trademarks of Texas Instruments ARM and Thumb are registered trademarks and Cortex is a trademark of ARM Limited Other names and brands may be claimed as the property of others Texas Instruments 108 Wild Basin Suite 350 P Austin TX 78746 http www ti com stellaris T Cortex Intelligent Processors by ARM 2 January 6 2010 Stellaris amp LM3S3748 Evaluation Kit Table of Contents Chapter 1 Stellaris LM3S3748 Evaluation 9 RII 10 Block Diagrams DER 10 11 Evaluation Board 12 Microcontroller Features taitoi De Ma et eat a abe 12 Chapter 2 Hardware ansa natn nass Haei 15 LM3S3748 Microcontroller 15 eoe sje
21. W20R 2STE1LF Connector 20 way 1mm FCI Digikey 609 1914 2 ND ZIF flat flex connector 04 1 CAT93CA6YI G Serial Eeprom 1Kbit Catalyst Mouser CAT93C46YI G AT93C46A 10TU 2 7 TSSOP8 Atmel Digikey U5 1 FT2232D IC USB to Serial Ftdi Ftdi FT2232D Interface TQFP48 U6 1 LC4032V 75TN48C IC CPLD 32 macro cell Lattice Arrow LC4032V 75TN48C TQFP48 U7 1 TPS2051BDGN IC Fault protected power Tl Digikey 296 17313 1 ND switch TSSOP8 U8 1 PQ1LA333MSPQ IC Voltage regulator 3 3V Sharp Mouser 852 PQ1LA333MSPQ 500mA SOT89 5 09 1 505 11 IC Full speed USB switch Fairchild Digikey 512 FSUSB11MTCX TSSOP 14 Mouser Y1 1 NX8045GB Crystal 8 00MHz NDK Digikey 644 1018 2 ND 8 000000MHZ 8 0x4 5mm SMT Y2 1 HCM49 4 194304MABJT Crystal 4 194304MHz Citizen Mouser 695 HCM49 419 U HC49US SMT Digikey 300 8529 1 ND Y3 1 FOXSDLF 060 20 Crystal 6 00 2 Fox Mouser 559 FOXSDLF 060 20 HC49US SMT Digikey 631 1008 2 ND 1 EK LM3S3748 A PCB FR 4 4 layer Rev A Advanced Advance EK LM3S3748 d 3 3M 4949 Tape VHB Foam Double 3M Uline S 10144 coat 45mil 0 25 x 1 25 cut piece 1 01002860 Adhesive label for Drake Drake 01002860 speaker LMI logo 0 5 x0 5 SW3 1 5555820201 Slide Switch SMT verticle Alps Mouser 688 5555820201 CUS22 TB SPCO Copal Digikey 563 1105 1 ND R40 JP33 2 ERJ 3GEYOROOV Resistor 0 Ohms 0603 Panasoni Digikey P0 0GTR ND Do not populate J3 0 05 JTAG header R41 R43 BAT1 January 6 2010 37 38 January 6 2010 Connection Details
22. an external debug cable When the debugger software connected to the EVB s USB controller the EVB automatically selects Mode 2 and illuminates the red Debug Out LED Debug In Considerations Debug Mode 3 supports evaluation board debugging using an external debug interface Mode 3 is automatically selected when a device such as a Segger J Link or Keil ULINK is connected to the EVB January 6 2010 17 Debugging Debug USB An FT2232 device from Future Technology Devices International Ltd manages USB to serial conversion The FT2232 is factory configured to implement a JTAG SWD port synchronous serial on channel A and a Virtual COM Port VCP on channel B This feature allows two simultaneous communications links between the host computer and the target device using a single USB cable Separate Windows drivers for each function are provided on the Documentation and Software CD The ICDI USB capabilities are completely independent from the LM3S3748 s on chip USB functionality A small serial EEPROM holds the FT2232 configuration data The EEPROM is not accessible by the LM3S3748 microcontroller For full details on FT2232 operation go to www ftdichip com USB to JTAG SWD The FT2232 USB device performs JTAG SWD serial operations under the control of the debugger A CPLD U6 multiplexes SWD and JTAG functions and when working in SWD mode provides direction control for the bidirectional data line The CPLD also implements logic to selec
23. as SD card support The LM3S3748 EVB be used either as an evaluation platform or as a low cost in circuit debug interface ICDI In Debug Interface mode the on board microcontroller is bypassed allowing programming or debugging of an external target The LM3S3748 Evaluation Kit enables rapid evaluation and prototyping of LM3S3748 microcontroller designs The kit also includes extensive example applications and complete source code Figure 1 1 shows the LM3S3748 EVB in detail Figure 1 1 LM3S3748 Evaluation Board Color LCD Panel MicroSD card slot USB Device Connector Oscilloscope terminals USB Host Connector TN N Reset switch USB interface 5 VDC supply for Debugger input USB Power b Mode Switch Ts 727 Lu LM33S3748 Stellaris LM3S3748 JTAG SWD Microcontroller 4962 p D Pius input and i Un eri on es output 34 pin break out header 3 p _ STATU gut 34 pin break Status LED out header Speaker Navigation switch with press to select January 6 2010 Features Features The Stellaris LM3S3748 Evaluation Board includes the following features Stellaris LM3S3748 microcontroller 2 channel oscilloscope demo application USB Host and Device connectors Bus powered or self powered Simple setup USB cable provides serial communication debugging and power Color LCD
24. ctronic Electroni AP TR P LF 10995 TSM 110 01 S DH A P placement cap s 4ucon cs TR TSM 110 01 L DH A Samtec 4ucon P TR TSM 110 01 T DH A P TR J5 1 PJ 014D SMT Connector DC Jack SMT CUI Digikey CP 014DPJTR ND 1 3x3 8mm J6 J7 2 54819 0572 Connector USB Mini B Molex Mouser 538 54819 0572 SMT 5pin January 6 2010 35 Table C 1 LM3S37468 of Materials Continued Reference Qty Part Number Description Mfg Supplier Stock No L1 L2 2 CBC2012T4R7M Inductor 4 7UH 360 Taiyo Digikey 587 1602 1 ND 0805 Chip Inductor Yuden LED1 LED3 2 LTST C171GKT LED 0805 SMT Green LiteOn Mouser LTST C171GKT Arrow LED2 LED4 2 LTST C171EKT LED 0805 SMT Red LiteOn Mouser LTST C171EKT Arrow 1 1 2908 05WB MG Connector Micro SD 3M Mouser 517 2908 05WB MG card push push SMT Q1 Q2 Q3 3 FDG6322C Mosfet P N Channel Fairchild Digikey FDG6322CTR ND Complementary Pair 25V SC70 6 R1 1 ERJ 3GEYJ105V Resistor 1M Ohms 5 Panasoni Digikey P1 0MGCT ND 0603 R12 R14 R15 5 ERJ 3EKF1003V Resistor 100K 196 0603 Panasoni Digikey P100KHCT ND R38 R39 R13 1 ERJ 3EKF1203V Resistor 120K 196 0603 Panasoni Digikey P120KHCT ND R18 R19 R20 5 ERJ 3GEYJ331V Resistor 330 ohms 5 Panasoni Digikey P330GCT ND R21 R28 0603 2 16 17 5 ERJ 3GEYJ103V Resistor 10K 596 0603 Panasoni Digikey P10KGCT ND R23 R31 22 1 ERJ 3GEYJ470V
25. ed via D2 and D3 Oscilloscope The oscilloscope feature has two differential measurement channels which provide waveform acquisition using the LM3S3748 microcontroller s Analog to Digital Converter ADC This section describes the oscilloscope hardware For a detailed description of the oscilloscope operation and software see the Stellaris amp Peripheral Driver Library User s Guide in the LM3S3748 Evaluation Kits Example Applications section Voltage Reference The oscilloscope circuit can measure negative voltages by biasing the oscilloscope input channels to 1 5 V A voltage divider is buffered by an op amp 02 for a low impedance voltage reference The reference voltage varies proportionally with the 3 3 V rail but the differential measurement configuration will successfully reject this error Differential Inputs 20 Both input channels have 11 1 differential input voltage dividers For accuracy 0 196 resistors are used The ADC inputs to the LM3S3748 microcontroller have two key parameters sets in this application circuit The first are the common mode absolute voltage limits of 0 to 3 0 V This sets the voltage limit on any oscilloscope input signal to 416 5 V to 16 5 V using the following equations Vref 11 16 5 V min Vref 11 16 5 V The second key parameter set is the differential mode voltages limits which are 1 5 V and 1 5 These values
26. er selection while power is applied Doing so may damage the switch contacts When using the EVB in USB Host mode power to the EVB should be supplied by the In circuit Debugger ICDI USB cable or by 5 V source connected to the DC power jack Set the USB power switch to self power Note that the LM3S3748 microcontroller s USB capabilities are completely independent from the ICDI USB functionality Debugging Stellaris microcontrollers support programming and debugging using either JTAG or SWD JTAG uses the signals TCK TMS TDI and TDO SWD requires fewer signals SWCLK SWDIO and optionally SWO for trace The debugger determines which debug protocol is used Debugging Modes LM3S3748 EVB supports a range of hardware debugging configurations Table 2 3 summarizes these configurations Table 2 3 LM3S3748 EVB Hardware Debugging Configurations Mode Debug Function Use Selected by 1 Internal ICDI Debug on board LM3S3748 Default mode microcontroller over Debug USB interface 2 ICDI out to JTAG The EVB is used as a USB to Connecting to an external target and SWD header SWD JTAG interface to an starting debug software external target The red Debug Out LED will be ON 3 In from JTAG SWD For users who prefer an external Connecting an external debugger to header debug interface ULINK JLINK the JTAG SWD header etc with the EVB Modes 2 and 3 automatically detect the presence of
27. gnals Each port has additional ESD protection diode arrays D9 D10 for up to 15 kV of electrostatic discharge ESD protection Table 2 2 USB Related Signals Microcontroller Pin EVB Function To isolate remove Pin 70 USBDM USB Data Pin 71 USBDP USB Data Pin 73 USBRBIAS USB bias resistor Pin 66 Input see Rev 0 errata 67 1 Input see Rev 0 errata Pin 84 PH2 USB Host Device mux control JP33 Pin 83 PH3 USBOEPEN Host power enable active high Pin 76 PHA USBOPFLT Host power fault active low U7 a fault protected switch controls and monitors power to the USB Host port USBOEPEN the control signal from the microcontroller has a pull down resistor to ensure Host port power remains January 6 2010 Stellaris amp LM3S3748 Evaluation Kit off during reset The power switch immediately cuts power if the attached USB device draws more than 1 Amp or if the switches thermal limits are exceeded by a device drawing more than 500 mA Under fault conditions U7 will set its over current output pin low This is an open drain signal so a pull up must be enabled by the microcontroller The USB controller can be configured to generate an interrupt if USBOPFLT is asserted The EVB can be either a bus powered USB device or self powered USB device depending on the position of the USB power switch SW3 WARNING Do not change the USB pow
28. graphics display with 128 x 128 pixel resolution User LED and navigation switch with press to select 8Q Magnetic speaker with amplifier microSD card slot USB interface for debugging and power supply DC jack for optional 5 V power supply Standard ARM 20 pin JTAG debug connector with input and output modes LM3S3748 microcontroller I O available on labeled break out pads Block Diagram Figure 1 2 on page 11 shows the LM3S3748 EVB block diagram 10 January 6 2010 Stellaris amp LM3S3748 Evaluation Kit Figure 1 2 LM3S3748 EVB Block Diagram qi ool 1921 4 B r 000000000000000 0000000000 OOO OOOOOOOOOOOOO 019 01010 010 0010 I O Signal Break out JTAG SWD 9 Output Input 8 LCD Display CSTN 128 x 128 Debug USB signals Device Mode Host Mode USB Host Device Evaluation Board Kit Contents The Stellaris LM3S3748 Evaluation Kit contains everything needed to develop and run USB applications using Stellaris microcontrollers including LM3S3748 Evaluation Board EVB USB cables 1 each for device and debugger use USB flash memory stick Four oscilloscope test leads 20 pin JTAG SWD target cable CD containing version of one of the following including a toolchain specific Quickstart guide
29. h time power is applied unless the quickstart has been replaced with a user program Clocking The EVB uses an 8 0 2 crystal to complete the LM3S3748 microcontroller s main internal clock circuit An internal PLL configured in software multiplies this clock to 50 MHz for core and peripheral timing The real time clock oscillator is part of the microcontroller s Hibernation module and uses a 4 194304 MHz crystal for timing This frequency divides by 128 to generate a 32 7680 kHz standard timing frequency Reset The LM3S3748 microcontroller shares its external reset input with the LCD display In the EVB reset sources are gated through the CPLD though in a typical application a simple wired OR arrangement with a resistor to 3 3 V is sufficient External reset is asserted active low under any one of these conditions Power on reset Reset push switch SW1 held down By the USB device controller 05 FT2232 when instructed by the debugger Power Supplies The EVB has two main power rails A 3 3 V supply powers the microcontroller and most other circuitry A 5 V supply is used by the Host USB port and In circuit Debug Interface ICDI USB controller A low drop out LDO regulator converts the 5 V power rail to 43 3 V Both rails are routed to pads on the break out headers and be used to power external circuits January 6 2010 15 LM3S3748 Microcontroller Overview USB 16 EVB power can be
30. in 90 PB6 Right Switch JP23 Pin 89 PB7 Select Switch D1 The press to select switch also connects to the WAKE signal on the LM3S3748 s microcontroller s Hibernate module Diode D1 blocks current from the WAKE internal pull up when in Hibernate mode The diode is transparent in normal switch operation Status LED A user LED is provided for general use The LED is connected to PG2 PWMO allowing the option of either GPIO or PWM control brightness control Interfacing to the EVB An array of accessible signals makes it easy to interface the EVB to external circuits All LM3S3748 lines except those with both JTAG and SWD functions are brought out to 0 1 pitch pads For quick reference silk screened labels on the PCB show primary pin functions Table x on page y has a complete list of I O signals well as recommended connectors Most LM3S3748 I O signals are 5 V tolerant Refer to the LM3S3748 microcontroller data sheet for detailed electrical specifications Bypassing Peripherals The EVB s on board peripheral circuits require 30 GPIO lines This leaves 23 GPIO lines immediately available for connection to external circuits If an application requires more GPIO lines the on board hardware can be disconnected The EVB is populated with 30 jumper links which can be cut with a knife to isolate on board hardware The process can be reversed by installing 0603 0 chip resistors NOTE The quicks
31. ion solutions Products Applications Amplifiers amplifier ti com Audio www ti com audio Data Converters dataconverter ti com Automotive www ti com automotive DLP Products www dlp com Communications and www ti com communications Telecom DSP dsp ti com Computers and www ti com computers Peripherals Clocks and Timers www ti com clocks Consumer Electronics www ti com consumer apps Interface interface ti com Energy www ti com energy Logic logic ti com Industrial www ti com industrial Power Mgmt power ti com Medical www ti com medical Microcontrollers microcontroller ti com Security www ti com security RFID www ti rfid com Space Avionics amp www ti com space avionics defense Defense and ZigBee Solutions www ti com Iprf Video and Imaging www ti com video Wireless www ti com wireless apps Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265 Copyright 2010 Texas Instruments Incorporated
32. ipping by a thin protective plastic film Remove the film by gently pulling the green tab Features The color LCD includes the following features Formike Electronic KWH015C04 F01 display CSTN 128 x 1128 resolution 16 bit color White LED backlight 8 bit data bus ST7637 Drive IC Control Interface The color LCD module has a built in controller IC with an 8 bit parallel interface Port G is used to transfer data to and from the LCD module Three control signals A0 WR RD provide read write and register data control using GPIO pins Table 2 5 LCD Related Signals Microcontroller Pin EVB Function To isolate remove Pin 19 PGO LCD Data 0 JP16 Pin 18 LCD Data 1 JP14 Pin 19 2 LCD Data 2 JP17 Pin 16 PG3 LCD Data 3 JP18 Pin 41 PG4 LCD Data 4 JP26 Pin 40 PG5 LCD Data 5 JP27 Pin 37 PG6 LCD Data 6 JP28 Pin 36 PG7 LCD Data 7 JP29 Pin 25 4 LCD Write Enable active low JP30 Pin 24 PC5 LCD Read Enable active low JP21 Pin 72 PB2 LCD Register Data select JP11 Pin 61 PF1 PWM1 Backlight control JP19 Backlight The white LED backlight must be powered for the display to be visible Set PF1 PWM1 high to turn on the backlight For brightness control use the pin s PWM function to reduce the normal 34 mA supply current January 6 2010 19 Oscilloscope Power The LCD module has internal bias voltage generators and requires only a single 3 Vdc supply which is provid
33. make corrections modifications enhancements improvements and other changes to its products and services at any time and to discontinue any product or service without notice Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete All products are sold subject to Tl s terms and conditions of sale supplied at the time of order acknowledgment TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with Tl s standard warranty Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty Except where mandated by government requirements testing of all parameters of each product is not necessarily performed TI assumes no liability for applications assistance or customer product design Customers are responsible for their products and applications using Tl components To minimize the risks associated with customer products and applications customers should provide adequate design and operating safeguards TI does not warrant or represent that any license either express or implied is granted under any TI patent right copyright mask work right or other TI intellectual property right relating to any combination machine or process in which TI products or services are used Information published by TI regarding third party products or services does not constitu
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35. ot drive the PWM levels to opposite polarities for more than 10 ms Waveform mode uses two high frequency PWM signals to drive a MOSFET H bridge with an output filter This circuit is essentially a Class D amplifier The symmetrical 2nd order low pass L C filter has a cut off frequency of approximately 33 kHz The microcontroller s PWM module should be configured with a PWM frequency of at least 66 kHz Using higher frequencies for example 500 kHz improves audio quality Once configured audio waveform data can be used to update the PWM duty cycle at a rate equal to the audio sampling rate The speaker on the evaluation board has standard 8 Q impedance Audio quality can be enhanced by adding a small vented enclosure around the speaker Table 2 7 Speaker Related Signals Microcontroller Pin EVB Function To isolate remove Pin 60 PF2 PWM2 Audio PWM JP22 Pin 59 PF3 PWM3 Audio PWM JP20 January 6 2010 Stellaris amp LM3S3748 Evaluation Kit Navigation Switch The EVB has four way navigation switch SW2 with press to select functionality Each of the five signals connects to GPIO pins on the LM3S3748 microcontroller The internal 200 ko pull up resistors should be enabled before reading switch status Table 2 8 Navigation Switch Related Signals Microcontroller Pin EVB Function To isolate remove Pin 65 PB3 Up Switch JP13 Pin 92 4 Down Switch JP10 Pin 91 PB5 Left Switch JP9 P
36. rovides the BOM for the LM3S3748 Evaluation Kit Table C 1 LM3S3748 Bill of Materials Reference Qty Part Number Description Mfg Supplier Stock No C1 C2 2 C0603C100J5GACTU Capacitor 10pF 50V 596 Kemet Mouser 80 C0603C100J5G Ceramic NPO COG 0603 C3 C4 C25 4 C0603C270J5GACTU Capacitor 27pF 50V 596 Kemet Mouser 80 C0603C270J5G C26 Ceramic NPO COG 0604 C39 1 T491D157M010AT Capacitor 150uF 10V Kemet Digikey 399 3778 2 ND Tantalum Size D C6 C11 C12 23 C0603C104K4RACTU Capacitor 0 1uF 16V Kemet Mouser 80 C0603C104K4R C13 C14 C16 10 0603 X7R C17 C18 C20 C21 C22 C23 C27 C28 C29 C30 C31 C32 C33 C34 C40 C41 C42 C7 C15 C19 6 TMK212BJ105KG T Capacitor 1 0uF 25V X5R Taiyo Digikey 587 1291 1 ND C35 C36 C38 0805 Yuden C8 C9 C10 5 C0603C103J5RACTU Capacitor 0 01uF 50V Kemet Mouser 80 C0603C103J5R C24 C37 596 0603 X7R D2 D3 D4 D5 4 MBR0520L Diode Schottky 500mA Fairchild Arrow MBR0520L 20V 00123 Mouser D1 D6 D7 3 MA2J728 Diode Schottky 30mA Panasoni Digikey MA2J72800LTR ND 30V Low Ir 08 09 010 3 TPD2E001DRLR Diode ESD protection TI Digikey 296 21883 1 ND array Low cap SOT 533 J1 1 AU Y1006 R 154 Connector USB Type A Assmann Digikey AE9924 ND 154 UAR42 E Kobiconn Mouser UAR42 E J2 1 538 22 28 4083 Connector 8 way SIL Molex Mouser 22 28 4083 header 0 1 J4 1 TSHSM 110 D 02 T H Connector 20 way dual ML ML TSHSM 110 D 02 T H AP TR P LF 10995 header r a SMT with Ele
37. supplied through three different connectors as shown in Table 2 1 Table 2 1 Board Power Options Power Source Reference Main Features USB Host Feature Powered Powered DC Jack J5 Yes Yes USB Device connector J6 Yes No Debug Interface USB J7 Yes Yes connector a To power the EVB the USB power switch SW3 must be in the BUS position Only one power source should be connected to the EVB If the USB Power switch SW3 is in the BUS position the board should be powered from J6 USB Device connector If the USB Power switch is in the SELF position the board should be powered from J7 Debug USB connector or from J5 DC power jack Do not apply power to J5 and J7 at the same time The current and voltage available on the USB host port is a function of the EVB power source If board power is provided by a USB cable the host port power is limited to 500 mA minus the EVB power requirements Use the DC jack to provide power from a 5 V source if a full 500 mA USB host supply is necessary on J7 The LM3S3748 s full speed USB controller supports both Host and Device configurations In Host mode the EVB acts as a host for USB devices connected to J1 In Device mode the EVB acts as a device and can be connected to another USB host such as a PC The EVB has dedicated USB Host and USB Device connectors A multiplexer U9 controlled by a GPIO pin PH2 PBO determines which port is active by switching D and D si
38. t 0 CARDTX OSCI USBODM PAS SSIOTX ogy XOSCO USBORBIAS CARDRX XOSCI 2 24 PEUPWMO TED mm 50 WAKE JPI9 n gt gt HB 1 1 65 m 21728 0 4 J T vous gt lt 15 PF2 PWM2 2 8 00MHz 4 194304MHz UD 0 01UF 0 1UF us SOUND 333V 64 c2 C4 Me 1 PE PWMS SOUND R2 VDD33 mr 10PF 10 27 27PF DD PB3 DCOSDA c GND VDD33 JP10 E MCURSTn gt GND PBA CO IRE DOWN SWn 1 9 5 GND VBAT 5 LEFT SWn OMIT GND 123 GND PB6 CO C6 L G6 O lt RIGHT SWn 7 0 1UF 1 15 GND LDO Final prototype release GND 7 WAKEn SELECT SWn First production release GND VDD25 X Di GND VDD25 PB7 NMI Add PBI to 5V jumper 25 1 62 Add pull up on reset switch GNDA VDD25 1 88 21728 l all LM383748 CT C12 c14 C16 0 01UF ES O 1UF 4 45 Texas INSTRUMENTS Drawing Tite Stellaris USB Host Device Eval Board Page Title Microcontroller Size p Document Number n M3S3748 Date 7 3 2008 Shet R9 1 2 gt 6 5V INPUT 15 2 PJ 014D SMT DBG 5V Bus Power Self Power Switch 3 3V
39. t 4 c4 Rev 1 2 3 4 5 6 NCP TX SWO EN FTDI FTDI TDI DO DI FTDI TMS FTDIJTAGEN gt FTDI SRSTn FTDI DBG DBGOUT 4 566 XTCK gt 187 lt UOTX JTAGEN L 120 SWDEN 2136 DBG XIDD lt XTMS n DBGOUT INTDBG DBGLED gg TEST L M02 RC 55 TRSTn EXTCABLEn gt HIBn gt N A Texas Instruments Inc 1115 MCURSTn gt 114 JTAG Logic with Auto Mode Detect Hibernate and TVcc Control Sept 28 2007 This appendix contains plots showing component locations and board dimensions Component Locations see page 32 Evaluation Board Dimensions see page 33 Component Locations The figure on the following page shows component locations January 6 2010 31 LM3S3748 Evaluation Board Component Locations Component Locations Figure B 1 SD CARD use 75 EU C38 o C36 m BUS E 7042
40. t between the three debug modes The target microcontroller selection is determined by multiplexing TCK SWCLK Virtual COM Port The Virtual COM Port VCP allows Windows applications such as HyperTerminal to communicate with UARTO on the LM3S3748 over USB Once the FT2232 VCP driver is installed Windows assigns a COM port number to the VCP channel Table 2 4 Debug Related Signals Microcontroller Pin EVB Function To isolate remove Pin 77 TDO SWO JTAG data out or trace data out i Pin 78 TDI JTAG data in Pin 79 TMS SWDIO JTAG TMS or SWD data in out i Pin 80 TCK SWCLK Clock or SWD clock Pin 26 PA0 U0RX Virtual Com port data to LM3S3748 JP12 Pin 27 PA1 U0TX Virtual Com port data from LM3S3748 JP25 Serial Wire Out 18 The EVB supports the Cortex M3 Serial Wire Output SWO trace capabilities Under debugger control the CPLD can route the SWO datastream to the VCP transmit channel The debugger can then decode and interpret the trace information received from the Virtual Com Port VCP The normal VCP connection to UARTO is interrupted when using SWO Not all debuggers support SWO Refer to the Stellaris LM3S3748 Datasheet for additional information on the Trace Port Interface Unit TPIU January 6 2010 Stellaris amp LM3S3748 Evaluation Kit Color LCD The EVB features a liquid crystal graphics display with 128 x 128 pixel resolution The display is protected during sh
41. tart application will not run if one or more jumpers are removed In Circuit Debugger Interface The LM3S3748 Evaluation Kit can operate as an In Circuit Debugger Interface ICDI ICDI acts as a USB to the JTAG SWD adaptor allowing debugging of any external target board that uses a Stellaris microcontroller See Debugging on page 17 for a description of how to enter Debug Out mode January 6 2010 23 In Circuit Debugger Interface Figure 2 3 24 ICD Interface Mode Connecting Pin 18 to GND sets JTAG or SWD connects to the external debug mode external microcontroller Evaluation Board Stellaris Stellaris SS PC with IDE debugger TCK SWCLK bypasses the on board microcontroller The debug interface operates in either serial wire debug SWD or full JTAG mode depending on the configuration in the debugger IDE The IDE debugger does not distinguish between the on EVB Stellaris microcontroller and an external Stellaris microcontroller The only requirement is that the correct Stellaris device is selected in the project configuration The Stellaris target board should have a 2x10 0 1 pin header with signals as indicated in Table D 2 on page 40 This applies to both an external Stellaris microcontroller target Debug Output mode and to external JTAG SWD debuggers Debug Input mode ICDI does not control RST device reset or TRST test reset signals Both reset functions are implemented as commands over JTAG SWD
42. te a license from TI to use such products or services or a warranty or endorsement thereof Use of such information may require a license from a third party under the patents or other intellectual property of the third party or a license from TI under the patents or other intellectual property of TI Reproduction of TI information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied by all associated warranties conditions limitations and notices Reproduction of this information with alteration is an unfair and deceptive business practice is not responsible or liable for such altered documentation Information of third parties may be subject to additional restrictions Resale of TI products or services with statements different from or beyond the parameters stated by TI for that product or service voids all express and any implied warranties for the associated TI product or service and is an unfair and deceptive business practice is not responsible or liable for any such statements TI products not authorized for use in safety critical applications such as life support where a failure of the product would reasonably be expected to cause severe personal injury or death unless officers of the parties have executed an agreement specifically governing such use Buyers represent that they have all necessary expertise in the safety and regulatory ramifications of their applicati
43. uced when an is fed from a high impedance source Each time the ADC makes a conversion a very small capacitor in the ADC input stage must be charged During the charging period the voltage may drop slightly Using only one oscilloscope channel will reduce the error because the internal capacitance charges to approximately the same level for each conversion The error can also be reduced by adding a capacitor across the differential inputs to the ADC for example between ADCO and ADC 1 Adding 33 pF capacitors will stabilize the input to the ADC however it will also create a 24 kHz low pass filter This will limit the usable bandwidth of the oscilloscope but will optimize it for DC level measurements Another method is to reduce the values of the input divider resistors The best overall solution would be a high performance op amp buffer stage Other Peripherals Speaker 22 The LM3S3748 evaluation board s speaker circuit can be used in either tone or waveform mode In tone mode the LM3S3748 microcontroller s PWM module directly generates tones within the audible frequency range The width of the pulses determines the volume If only one PWM signal 2 or PWM3 is used then the non PWM signal should be configured as a general purpose output For increased speaker volume PWM2 and PWMS can be configured as complementary drive signals In tone and waveform modes be careful to avoid large DC currents in the speaker Do n
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