Uart Interfaces - Quectel BG95 Series Hardware Design

3.10. UART Interfaces

The module provides three UART interfaces: Main UART, Debug UART and GNSS UART interfaces.
Features of them are illustrated below:
 The Main UART 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, and supports RTS and CTS hardware flow control.
The default frame format is 8N1 (8 data bits, no parity, 1 stop bit).
 The Debug UART interface supports a fixed baud rate of 115200bps, and is used for software
debugging and log output.
 The GNSS UART interface supports 115200bps baud rate by default, and is used for GNSS data and
NMEA sentences output.
The following tables show the pin definition of the three UART interfaces.
Table 12: Pin Definition of Main UART Interface
Pin Name Pin No.
DTR 30
RXD 34
TXD 35
CTS 36
RTS 37
DCD 38
RI 39
NOTE
AT+IPR command can be used to set the baud rate of the Main UART interface, 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 more details about these AT commands.
BG95_Hardware_Design
I/O Description
Data terminal ready.
DI
Sleep mode control
DI Receive data
DO Transmit data
DO Clear to send
DI Request to send
DO Data carrier detection
DO Ring indication signal
LPWA Module Series
BG95 Hardware Design
Comment
1.8V power domain
1.8V power domain
1.8V power domain
1.8V power domain
1.8V power domain
1.8V power domain
1.8V power domain
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