Chapter 6: Omnii Expansion Ports and Connectors
Expansion Port 1 (End-Cap Connector)
Psion Teklogix Omnii HDK User Manual
95
Pinout
The 22-pin end-cap connector provides access to expansion port 1, with the following pinout:
Connecting to Expansion Port 1
Expansion port 1 is located on the top edge of the main logic board. There is no latch on this
connector; the cable is held by contact force alone. Push the stiffened end of the flex cable, with
the exposed contacts facing downwards towards the main logic board, straight into the socket until
it is firmly seated.
Table 6.7 Pinout of 22-pin End-Cap Connector
Pin
Signal
Function
I/O Type Voltage
(V)
1
EXP1_3V3
Power. 100 mA current limited
Power
3.3
2,6,9,18,
20,21,22
GND
Ground
Ground
3,4,5
EXP1_VSYS
Power. Raw unregulated battery voltage
1000 mA current limited
Power
3.0-4.2
7
E
USB Host D+
I/O
8
EXP1_USB-
USB Host D-
I/O
10
EXP1_RTS_GPIO3
Serial RTS / GPIO pin 3
I/O
3.3
11
EXP1_CTS_GPIO2
Serial CTS / GPIO pin 2
I/O
3.3
12
EXP1_RXD_GPIO1
Serial RXD / GPIO pin 1
I/O
3.3
13
EXP1_TXD_GPIO0
Serial TXD / GPIO pin 0
I/O
3.3
14
EXP1_CS_N_GPIO7 SPI chip select / GPIO pin 7 (Modem DTR)
I/O
3.3
15
EXP1_SCLK_GPIO6 SPI SCLK / GPIO pin 6 (Modem DSR)
I/O
3.3
16
EXP1_MISO_GPIO5 SPI MISO / GPIO pin 5 (Modem DCD)
I/O
3.3
17
EXP1_MOSI_GPIO4 SPI MOSI / GPIO pin 4 (Modem RI)
I/O
3.3
19
EXP1_1WIRE
Connection for 1-Wire EEPROM
I/O
3.3
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