Gps Control & I/O - SimCom SIM508EVB User Manual

SIM508 EVB User Guide
4.4 GPS control & I/O
Pin Signal
1 GPS_ON_OFF
2 GPS_GPIO0
3 GPS_BOOTSEL
4 GPS_GPIO4
5 GPS_MRST
6 GPS_GPIO8
7 GPS_TIMEMARK
8 GPS_GPIO13
9 GPS_FREQ_XFER
10 GPS_GPIO14
11 GND
12 GPS_TIMERSYNC
13 GND
14 GPS_VCC
SIM508-EVB_UGD_V1.01
Figure 17: GPS control & I/O interface
I/O
I GPS ON/OFF key
I/O Reserved.
For re-programming the Flash, it must be set to
I
High
I/O Reserved.
I Reset pin of the GPS part, active low.
I/O Reserved.
1 PPS timemark output for synchronizing to within
O
1 microsecond of GPS time.
I/O Reserved.
External CMOS clock source. This pin applies to the
I
SiRFLoc Client firmware, if unused, keep floating
I/O Reserved.
GND
External CMOS clock source. This pin applies to the
I
SiRFLoc Client firmware, if unused, keep floating
GND
I GPS part power supply
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