LTE Module Series
BG96 Hardware Design
BG96_Hardware_Design 37 / 78
UART1 interface supports 9600, 19200, 38400, 57600, 115200, 230400, 460800 and 921600 baud
rates, and the default is 115200bps. It is used for data transmission and AT command
communication.
UART2 interface supports 115200bps baud rate. It is used for module debugging and log output.
UART3 interface supports 115200bps baud rate. It is used for outputting GNSS data and NEMA
sentences.
The following tables show the pin definition of the three UART interfaces.
Table 11: Pin Definition of UART1 Interface
Pin Name
Pin No.
I/O
Description
Comment
DTR
30
DI
Data terminal ready
1.8V power domain
RXD
34
DI
Receive data
1.8V power domain
TXD
35
DO
Transmit data
1.8V power domain
CTS
36
DO
Clear to send
1.8V power domain
RTS
37
DI
Request to send
1.8V power domain
DCD
38
DO
Data carrier detection
1.8V power domain
RI
39
DO
Ring indicator
1.8V power domain
Table 12: Pin Definition of UART2 Interface
Pin Name
Pin No.
I/O
Description
Comment
DBG_TXD
23
DO
Transmit data
1.8V power domain
DBG_RXD
22
DI
Receive data
1.8V power domain
Table 13: Pin Definition of UART3 Interface
Pin Name
Pin No.
I/O
Description
Comment
UART3_TXD
27
DO
Transmit data
1.8V power domain
UART3_RXD
28
DI
Receive data
1.8V power domain