GNSS Module Series
LG77L EVB User Guide
LG77L_EVB_User_Guide 13 / 28
Table 3: J401 Pin Detailed Description
Pin Name
I/O
Description
TXD
DO
Transmits data
RXD
DI
Receives data
RESET_N
DI
Resets the module
FORCE_ON
DI
Wakes up the module from backup mode
ANT_DET
DI
Detects active antenna open-circuit
GND
-
Ground
JAM_DET
DI
Detects jamming signal
1PPS
DO
1 pulse per second
ANT_OK
DI
Detects active antenna short-circuit
ANT_OFF
DO
Controls active antenna power
