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devices:srxe:handheld:pinouts

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Table of Contents

SMART Response XE Handheld PCB Pinouts

Original

Test Points

TCK top left if oriented with SW1 on top of board

Layout: 

TCK   TMS   TDO    TDI
         RST   MISO
SCK   GND   VCC    MOSI
 TCK - ATmega128RFA1 pin 3 [PF4:ADC4:TCK]
 SCK - ATmega128RFA1 pin 37 [PB1:SCK:PCINT1]
 TMS - ATmega128RFA1 pin 4 [PF5:ADC5:TMS]
 GND - GND
 RST - ATmega128RFA1 pin 12 [RSTN]
 TDO - ATmega128RFA1 pin 5 [PF6:ADC6:TDO]
 VCC - VCC (3.3V)
MISO - ATmega128RFA1 pin 39 [PB3:MISO:PDO:PCINT3]
 TDI - ATmega128RFA1 pin 6 [PF7:ADC7:TDI]
MOSI - ATmega128RFA1 pin 38 [PB2:MOSI:PDI:PCINT2]
 SCL - ATMega128RFA1 pin 25 [PD0:SCL:INT0], U5 pin 6
 SDA - ATMega128RFA1 pin 26 [PD1:SDA:INT1], U5 pin 7
CLK0 - ATmega128RFA1 pin 53 [PE7:ICP3:INT7:CLKO], R29 to Display pin 6

ISP Pads

Pin 1 top left if oriented with SW1 on top of board

Layout: 

1 2
3 4
5 6
  1. MISO, ATmega128RFA1 pin 39 [PB3:MISO:PDO:PCINT3]
  2. VCC (3.3V)
  3. SCK, ATmega128RFA1 pin 37 [PB1:SCK:PCINT1]
  4. MOSI, ATmega128RFA1 pin 38 [PB2:MOSI:PDI:PCINT2]
  5. RST, ATmega128RFA1 pin 12 [RSTN]
  6. GND

JTAG Pads

Pin 1 bottom left if oriented with SW1 on top of board

Layout: 

2 4 6 8 10
1 3 5 7 9
  1. TCK, ATmega128RFA1 pin 3 [PF4:ADC4:TCK]
  2. GND
  3. TDO, ATmega128RFA1 pin 5 [PF6:ADC6:TDO]
  4. VCC (3.3V)
  5. TMS, ATmega128RFA1 pin 4 [PF5:ADC5:TMS]
  6. RST, ATmega128RFA1 pin 12 [RSTN]
  7. NC
  8. NC
  9. TDI, ATmega128RFA1 pin 6 [PF7:ADC7:TDI]
  10. GND

RS232 pads

Pin 1 top left if oriented with SW1 on top of board

Layout: 

1 2
3 4
5 6
  1. U6 pin 13
  2. R36 to GND, U6 pin 1
  3. U6 pin 8
  4. R35 to VCC (3.3V)
  5. GND, RS232 pad 6
  6. GND, RS232 pad 5

Keyboard

Logical Layout (SK# are screen keys: top to bottom 1-5 on left, 6-10 on right): 

      ROW1|ROW2|ROW3|ROW4|ROW5|ROW6|ROW7|ROW8|ROW9|ROW10
 COL1    1|   2|   3|   4|   5|   6|   7|   8|   9|   10
 COL2    Q|   W|   E|   R|   T|   Y|   U|   I|   O|    P
 COL3    A|   S|   D|   F|   G|   H|   J|   K|   L| Bksp
 COL4 Shft|   Z|   X|   C|   V|   B|   N|   M|Entr|   Up 
 COL5  Sym|Frac|Root| Exp| Spc|   ,|   .|Down|Left|Right
 COL6  SK1| SK2| SK3| SK4| SK5| SK6| SK7| SK8| SK9| SK10 
 COL1 - ATmega128RFA1 pin 26 [PD1:SDA:INT1], ATmega128RFA1 pin 52 [PE6:T3:INT6]
 COL2 - ATmega128RFA1 pin 43 [PB7:OC0A:OC1C:PCINT7]
 COL3 - ATmega128RFA1 pin 42 [PB6:OC1B:PCINT6] 
 COL4 - ATmega128RFA1 pin 41 [PB5:OC1A:PCINT5]
 COL5 - ATmega128RFA1 pin 40 [PB4:OC2A:PCINT4] 
 COL6 - ATmega128RFA1 pin 46 [PE0:RXD0:PCINT8], U6 (unpopulated) pin 9
 ROW1 - ATmega128RFA1 pin 50 [PE4:OC3B:INT4] 
 ROW2 - ATmega128RFA1 pin 64 [PF1:ADC1]
 ROW3 - ATmega128RFA1 pin 2 [PF3:ADC3:DIG4]
 ROW4 - ATmega128RFA1 pin48 [PE2:XCK0:AIN0] 
 ROW5 - ATmega128RFA1 pin 47 [PE1:TXD0], U6 (unpopulated) pin 11
 ROW6 - ATmega128RFA1 pin 32 [PD7:T0] 
 ROW7 - ATmega128RFA1 pin 14 [PG0:DIG3]
 ROW8 - ATmega128RFA1 pin 19 [PG5:OC0B]
 ROW9 - ATmega128RFA1 pin 30 [PD5:XCK1]
ROW10 - ATmega128RFA1 pin 29 [PD4:ICP1]

Display

(P3) marked “S028HN118A VER:A1” reportedly an ST7586S display chip driving a 384×160 LCD display

Pin 1 on right if oriented with SW1 on top of board

  1. VPP pad
  2. ATmega128RFA1 pin 37 [PB1:SCK:PCINT1], ISP pad 3, Test Point SCK, U2 pin 6
  3. ATmega128RFA1 pin 38 [PB2:MOSI:PDI:PCINT2], ISP pad 4, Test Point MOSI, U2 pin 5
  4. R31 to ATmega128RFA1 pin 31 [PD6:T1]
  5. R30 to ATmega128RFA1 pin 16 [PG2:AMR]
  6. R29 to ATmega128RFA1 pin 53 [PE7:ICP3:INT7:CLKO], CLK0 pad
  7. EXT pad
  8. VCC
  9. C7 to C23 to Vin (6V)
  10. GND
  11. GND
  12. VCC
  13. C27 to C23 to Vin (6V)
  14. C6 to Display pin 15
  15. C6 to Display pin 14
  16. C28 to C23 to Vin (6V)

SW1

(Power Switch), Normally Open

Left and Right if oriented with SW1 on top of board 

L - GND
R - ATmega128RFA1 pin 27 [PD2:RXD1:INT2], Z1 pin 1

Speaker

(unpopulated)

Pin 1 top if oriented with SW1 on top of board)

  1. Speaker pin 2, Q1 (unpopulated) pin 2, R39 (unpopulated) to GND
  2. Speaker pin 1, Q1 (unpopulated) pin 2, R39 (unpopulated) to GND
  3. Speaker pin 4, R10 (unpopulated) to Q1 pin 1 + ATmega pin 49, R9 (unpopulated) to ?, C18 to GND
  4. Speaker pin 3, D1 (unpopulated) pin 3 (D1 pin 1 to GND)

U1 -- RF Switch

(Marked “G4J”) possible high-frequency (RF) SPDT switch uPG2214TB

Pin 1 top right if oriented with SW1 on top of board

  1. C39 to ANT1 (GND when board unpowered)
  2. GND
  3. C16 to ANT2
  4. ATmega pin 15, C35 to GND
  5. unmarked Capactior (between U1 and C36) to C36 to GND - theoretically connected to ATMega pins 8 + 9 via a Balun, see ATmega datasheet section 9.8.3.2
  6. ATmega pin 1, unlabeled capacitor to GND

U2 -- SPI Flash

(Marked “ATMLH028 Z7H1164A”) possible Two-Wire Serial EEPROM Atmel AT24C?

Pin 1 top right if oriented with SW1 on top of board

  1. ATmega128RFA1 pin 28 [PD3:TXD1:INT3], CS_Flash pad
  2. ATmega128RFA1 pin 39 [PB3:MISO:PDO:PCINT3], ISP pad 1, Test Point MISO
  3. R17 to VCC (3.3V)
  4. GND
  5. ATmega128RFA1 pin 38 [PB2:MOSI:PDI:PCINT2], ISP pad 4, Test Point MOSI
  6. ATmega128RFA1 pin 37 [PB1:SCK:PCINT1], ISP pad 3, Test Point SCK
  7. R16 to C53 to GND
  8. VCC (3.3V)

U3 -- ATmega128RFA1

Pin 1 top right if oriented with SW1 on top of board

  1. [PF2:ADC2:DIG2] - U1 pin 6 (possible RF switch)
  2. [PF3:ADC3:DIG4] - Keyboard ROW3
  3. [PF4:ADC4:TCK] - JTAG Pad 1, Test Point TCK
  4. [PF5:ADC5:TMS] - JTAG Pad 5, Test Point TMS
  5. [PF6:ADC6:TDO] - JTAG Pad 3, Test Point TDO
  6. [PF7:ADC7:TDI] - JTAG Pad 9, Test Point TDI
  7. [AVSS_RFP] - GND
  8. [RFP] - theoretically connected to Balun to antenna switch, see ATmega datasheet section 9.8.3.2
  9. [RFN] - theoretically connected to Balun to antenna switch, see ATmega datasheet section 9.8.3.2
  10. [AVSS_RFN] - GND
  11. [TST] -
  12. [RSTN] - ISP Pad 5, JTAG Pad 6, Test Point RST
  13. [RSTON] -
  14. [PG0:DIG3] - Keyboard ROW7
  15. [PG1:DIG1] - U1 pin 4 (possible RF switch)
  16. [PG2:AMR] - Display pin 5
  17. [PG3:TOSC2] - Y2 (32.768KHz crystal)
  18. [PG4:TOSC1] - Y2 (32.768KHz crystal)
  19. [PG5:OC0B] - Keyboard ROW8
  20. [DVSS:DSVSS] - GND
  21. [DVDD] -
  22. [DVDD] -
  23. [DEVDD] - VCC (3.3V)
  24. [DVSS] - GND
  25. [PD0:SCL:INT0] - U5 (unpopulated) pin 6, Test Point SCL
  26. [PD1:SDA:INT1] - Keyboard COL1, U5 (unpopulated) pin 7, Test Point SDA – Also pin 52
  27. [PD2:RXD1:INT2] - SW1 Right Side (SW1 NO, closes to GND)
  28. [PD3:TXD1:INT3] - U2 pin 1, CS_Flash
  29. [PD4:ICP1] - Keyboard ROW10
  30. [PD5:XCK1] - Keyboard ROW9
  31. [PD6:T1] - Display pin 4
  32. [PD7:T0] - Keyboard ROW6
  33. [CLKI] -
  34. [DEVDD] - VCC (3.3V)
  35. [DVSS] - GND
  36. [PB0:SSN:PCINT0] -
  37. [PB1:SCK:PCINT1] - Display pin 2, ISP Pad 3, U2 Pin 6, Test Point SCK
  38. [PB2:MOSI:PDI:PCINT2] - Display Pin 3, ISP Pad 4, U2 Pin 5, Test Point MOSI
  39. [PB3:MISO:PDO:PCINT3] - ISP Pad 1, U2 pin 2, Test Point MISO
  40. [PB4:OC2A:PCINT4] - Keyboard COL5
  41. [PB5:OC1A:PCINT5] - Keyboard COL4
  42. [PB6:OC1B:PCINT6] - Keyboard COL3
  43. [PB7:OC0A:OC1C:PCINT7] - Keyboard COL2
  44. [DEVDD] - VCC (3.3V)
  45. [DVSS] - GND
  46. [PE0:RXD0:PCINT8] - Keyboard COL6, U6 (unpopulated) pin 9
  47. [PE1:TXD0] - Keyboard ROW5, U6 (unpopulated) pin 11
  48. [PE2:XCK0:AIN0] - Keyboard ROW4
  49. [PE3:OC3A:AIN1] - Q1 pin 1 (unpopulated transistor to drive Speaker pins 1,2), R10 (unpopulated) to Speaker pins 3,4
  50. [PE4:OC3B:INT4] - Keyboard ROW1
  51. [PE5:OC3C:INT5] - U5 (unpopulated) pin 5
  52. [PE6:T3:INT6] - Keyboard COL1 – Also pin 26
  53. [PE7:ICP3:INT7:CLKO] - Display pin 6, Test Point CLK0
  54. [DEVDD] - VCC (3.3V)
  55. [DVSS] - GND
  56. [XTAL2] - Y1 (marked T160 MSF9, 16MHz crystal?)
  57. [XTAL1] - Y1 (marked T160 MSF9, 16MHz crystal?)
  58. [AVSS:ASVSS] - GND
  59. [EVDD] - VCC (3.3V)
  60. [AVDD] -
  61. [AVSS] - GND
  62. [AREF] - C17 (disconnected) to GND
  63. [PF0:ADC0] - to Battery Voltage Divider (Vin - R4 z825 KOhm) - Pin63 - R5 (300 KOhm) - GND)
  64. [PF1:ADC1] - Keyboard ROW2

U4 -- DC-DC converter

(Marked “PHNI”) 5-pin package, possible TPS62203DBV 3.3V DC-DC converter

Pin 1 bottom left if oriented with SW1 on top of board

Layout: 

5   4
1 2 3
  1. Vin (battery pack +, 6VDC nominal)
  2. C23 to Vin (battery pack +, 6VDC nominal)
  3. Vin (battery pack +, 6VDC nominal)
  4. L3 to VCC (3.3V)
  5. VCC (3.3V)

U5

10-pin package outline

Pin 1 top left if oriented with SW1 on top of board

  1. GND
  2. NC
  3. R13 (unpopulated) to U5 pin 5 + atmega pin 51
  4. GND
  5. ATmega128RFA1 pin 51 [PE5:OC3C:INT5], R13 (unpopulated) to U5 pin 3
  6. ATMega128RFA1 pin 25 [PD0:SCL:INT0], SCL test point, R7 (4.7 KOhm) to VCC
  7. ATMega128RFA1 pin 26 [PD1:SDA:INT1], ATmega128RFA1 pin 52 [PE6:T3:INT6], SDA test point
  8. GND
  9. VCC (3.3V), C19 to GND
  10. NC

U6

16-pin package outline (possibly intended to be a MAX3232 chip, but some pins are mixed up?)

Pin 1 bottom right if oriented with SW1 on top of board

  1. R36 to GND, RS232 pad 2
  2. C33 to pin 4
  3. C41 to GND
  4. C33 to pin 2
  5. C42 to pin 6
  6. C42 to pin 5
  7. C43 to GND
  8. RS232 pad 3
  9. ATmega128RFA1 pin 46 [PE0:RXD0:PCINT8] – Also used for Keyboard COL6
  10. not connected ?
  11. ATmega128RFA1 pin 47 [PE1:TXD0] – Also used for Keyboard ROW5
  12. pin 16
  13. RS232 pad 1
  14. C30 to pin 15
  15. C30 to pin 14
  16. pin 12, R37 to VCC (3.3V)
devices/srxe/handheld/pinouts.1685362690.txt.gz · Last modified: by jkent