GPS Engine Board M-9129
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Pin
Pin Name
Type
Function description
1
RXDB
I
Serial Data Input B
2
TXDB
O
Serial Data Output B
3
1PPS
O
1 PPS output, synchronized with GPS time.
TIME_MARK 1 PPS output, 1us/s
4
TXDA
O
Serial Data Output A
5
RXDA
I
Serial Data Input A
6
GND
G
Ground
7
GPIO8
I/O General purpose I/O
8
GPIO0
I/O General purpose I/O. flash at 1Hz when position is
fixed.
9
GPIO4
I/O General purpose I/O
10
VOUT
O
Power State Indicate, 2.8 VDC Output
11
Standby
I
Low active for power down,(Keep NC if not used is
High)
12
V_BAT
I
RTC and backup SRAM power Input:
DC Input:2.8~4.2V.
NC: provided it by module internal LDO.
13
VCC_IN
I
3.3 ~ 4.2 VDC Power Input
14
GPIO6
I/O General purpose I/O
15
GPIO7
I/O General purpose I/O
16
GPIO5
I/O General purpose I/O
17
GND
G
Ground
18
RESET
I
Reset , Low active
19
VCC_RF_O
O
Active antenna power supply output, 2.8 VDC
20
GND
G
Ground
21
RF_IN
I
GPS signal input,
2.80 VDC output
22
GND
G
Ground
