Chapter 9: Breakout Board
Board Components
Psion Teklogix Omnii HDK User Manual
125
1. J14: 6-pin header for USB devices
2. J33: 26-pin ZIF connector for connection to Omnii expansion port (recommended to use
J42 instead)
3. DS12: LED indicator for VSYS power enabled
4. J40: USB Type A port for USB devices
5. J24 - J28, J41: Jumper headers for SPI / GPIO selection
6. DS7 - DS10: LED indicators for SPI I/O expander (not for use with Omnii XT10)
7. J31: 8-pin header for SPI I/O expander (not for use with Omnii XT10)
8. J43 - J46: Jumper headers for GPIO / RS-232 selection
9. J12: 6-pin header for external SPI devices (not for use with Omnii XT10)
10. J29: Jumper header for external SPI 3.3 V / 5 V selection (not for use with Omnii XT10)
11. SW6: DIP switches for SPI I/O expander (not for use with Omnii XT10)
12. SW5: DIP switches for GPIO_4 and GPIO_5 input
13. J35: Header for accessing 3.3 V power from Omnii (EXP_3V3)
14. J3: Jumper header to enable 5 V VSYS power (HDK_5V0)
15. J36: Header for accessing VSYS 5 V power (HDK_5V0)
16. J37: Jumper header to enable 3.3 V VSYS power (HDK_3V3)
17. J34: Header for accessing VSYS 3.3 V power (HDK_3V3)
18. Scratch pad for HDK_5V0 and HDK_3V3 power connections
19. J42: 20-pin header for connection to Omnii expansion port
20. J38: Jumper header to enable VSYS power
21. J39: 6-pin header for 1-Wire EEPROM programming
22. J15: Jumper header for UART 3.3 V / 5 V selection
23. J16 - J19: Jumper headers for UART / RS-232 / GPIO selection
24. J11: 6-pin header for UART devices
25. DS3 - DS6: LED indicators for GPIO output
26. J20 - J23: Jumper headers for UART (J11) / RS-232 (J30) selection
27. J32: 8-pin header for GPIO devices
28. SW3, SW4: Tactile switches for GPIO_6 and GPIO_7 input
29. SW7, SW8: Tactile switches for SPI I/O expander (not for use with Omnii XT10)
30. J30: DE9 port for RS-232 serial devices (with full modem support)
31. DS2: LED indicator for VSYS 5 V (HDK_5V0) power enabled
32. DS11: LED indicator for VSYS 3.3 V (HDK_3V3) power enabled
Detailed schematic diagrams for the breakout board, showing how all the components are
connected, can be found in the file
BreakoutSch.pdf
, included with the Omnii HDK.
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