User's Manual

Confidential Preliminary – Subject to Change
 2010 China Mark, Ltd. T/A Montage Asia Page 7 of 19
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I/O: One main port and one internal expansion port
All pins are 16V tolerant and ESD protected
Main Port:
8-Pin, 3mm pitch header
3-Pins 2.8V GPIO
2-Pin 2.8V serial UART
TX output
RX input
1-Pin relay drive
-500mA drive
TVS overvoltage protection
1-Pin power input:
1.5A resetting fuse
TVS overvoltage protection
1-Pin ground
Internal expansion:
8-Pin, 1.25mm pitch header
3-Pins 2.8V I/O common with main GPIO port
2-Pins 2.8V I/O GPS serial port (test only)
1-Pin power input common with main port
1-Pin ground common with main port
1-Pin Li+ battery input to device
SIM: 6-Pin keyed insertion
LED:
Red GSM status
Green GPS status
Battery voltage measurement
Ambient temperature measurement
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