User's Manual

M10 Hardware Design
M10_HD_V3.0 - 44 -
460800bps.
Figure 22: Connection of software debug
3.8.3. UART Port 3
UART3:
 Two data lines: TXD3and RXD3
 UART3 port is used for AT command only and does not support GPRS data, CSD FAX,
Multiplexing function etc.
 Support the communication baud rates as the following:
4800, 9600, 14400, 19200,28800,38400,57600,115200.
 The default baud rate setting is 115200bps, and does not support autobauding. The baud rate
can be modified by AT+QSEDCB command. For more details, please refer to document [1].
Figure 23: Connection of Auxiliary UART port