2.5.2 RS-232C
UART that is connected to "RS-232C" can send and receive signals with the RS-232C level of
D-SUB9 pin connector.
Use a cross cable when you connect to PC.
RS-232C D-SUB Connector
Pin Number Signal
1 N.C.
2 RxD
3 TxD
4 N.C.
5 GND
6 N.C.
7 RTS(N.C.)
8 CTS(N.C.)
9 N.C.
RS-232C
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