GNSS Module Series
LC98S_EVB_User_Guide 13 / 27
Table 4: J104 Pin Detailed Description
Pin Name
I/O
Description
RXD
DI
Receives data
TXD
DO
Transmits data
SCL
-
NC
SDA
-
NC
GND
-
Ground
BOOT
DI
Forces the module to enter Boot download mode
1PPS
DO
One pulse per second
USB_DM
-
NC
USB_DP
-
NC
3.3V
PO
3.3 V output