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I/O Port Specifications
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Table A-8 shows pinout assignments for the 9-pin male DB-9 connector.
Table A-8 Serial Port Pinout
Pin Assignment Description
1 DCD Data carrier detect
2 RXD Receive data
3 TXD Transmit data
4 DTR Data terminal ready
5 GND Signal ground
6DSR Data set ready
7 RTS Request to send
8CTS Clear to send
9 RI Ring indicator