Uart3 Port - Quectel M12 Hardware Design

M12 Hardware Design
460800bps.
Module (DCE)
Debug port
DBG_TXD
DBG_RXD

3.8.3. UART3 Port

UART3:

Two data lines: TXD3and RXD3

UART3 port is used for AT command only and does not support GPRS data, CSD,
Multiplexing function etc.

UART3 supports the communication baud rates as the following:
4800, 9600, 14400, 19200,28800,38400,57600,115200

The default baud rate setting is 115200bps, and autobauding is not supported. The baud rate
can be modified by "AT+QSEDCB" command. For more details, please refer to document
[1].
Module (DCE)
M12_Hardware_Design_V3.3
GND
Figure 22: Connection of debug port
TXD3
RXD3
GND
Computer
TXD
RXD
GND
Host (DTE)
Controller
TXD
RXD
GND
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