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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