LPWA Module Series
BG96 Hardware Design
BG96_Hardware_Design 38 / 79
3.10. UART Interfaces
The module provides three UART interfaces: UART1, UART2 and UART3 interfaces. The following are
their features.
UART1 interface supports 9600bps, 19200bps, 38400bps, 57600bps, 115200bps, 230400bps,
460800bps and 921600bps baud rates, and the default is 115200bps. It is used for data transmission
and AT command communication.
UART2 interface supports 115200bps baud rate, and is used for module debugging and log output.
UART3 interface supports 115200bps baud rate, and is used for outputting GNSS data and NMEA
sentences.
The following tables show the pin definition of the three UART interfaces.
Table 11: Pin Definition of UART1 Interface
AT+IPR
command can be used to set the baud rate of the UART, and
AT+IFC
command can be used to
set the hardware flow control (hardware flow control is disabled by default). Please refer to
document [2]
for details.
Pin Name
Pin No.
I/O
Description
Comment
DTR
30
DI
Data terminal ready.
Sleep mode control.
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 indication
1.8V power domain
NOTE
