12
Pin Name
Pin
I/O
Description Notes
57, 58,
60
Antenna ANT_IN
2
I
Satellite
signal input
50 Ω impedance matching
UART
TXD1
35
O
COM1
Transmit
Data
COM1 output, leave
unconnected if no use
RXD1
36
I
COM1
Receive
Data
COM1 input, leave unconnected
if no use
TXD2
37
O
COM2
Transmit
Data
COM2 output, leave
unconnected if no use
RXD2
38
I
COM2
Receive
Data
COM2 input, leave unconnected
if no use
TXD3
39
O
COM3
Transmit
Data
COM3 output, leave
unconnected if no use
RXD3
40
I
COM3
Receive
Data
COM3 input, leave unconnected
if no use
System
FRESET_N
22
I
Hardware
Reset (low
effective)
Restore factory settings by
lowering FRESET_N for no less
than 5 seconds
PPS
44
O
PPS signal
PPS
EVENT
45
I
EVENT
signal
Event
