User's Manual

LTE Module Series
BG96-NA Hardware Design
BG96-NA_Hardware_Design Confidential / Released 36 / 64
3.11. UART Interfaces
The module provides two UART interfaces: the UART1 interface and UART2 interface. The following are
their features.
 The UART1 interface supports 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600 and
3000000bps baud rates, and the default is 115200bps. This interface is used for data transmission
and AT command communication.
 The UART2 interface supports 115200bps baud rate. It is used for module debugging and log output.
The following tables show the pin definition of the main and debug UART interfaces.
Table 11: Pin Definition of UART1 Interface
Pin Name
Pin No.
I/O
Description
Comment
DTR
30
DI
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 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