RS-232
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RS-232 and RS-422 Serial ConnectorsDevice 2009. 4. 22. 23:07
Table 7-3. DB-9 Pin Assignments Pin RS-232 Mode RS-422 Mode 1 DATA CARRIER DETECT (DCD) RESERVED 2 RECEIVE DATA (RXD) RECEIVE DATA (RXD) 3 TRANSMIT DATA (TXD) TRANSMIT DATA (TXD) 4 DATA TERMINAL READY (DTR) TRANSMIT DATA+ (TXD+) 5 GROUND SIGNAL GROUND 6 DATA SET READY (DSR) RECEIVE DATA+ (RXD+) 7 REQUEST TO SEND (RTS) OUTPUT HANDSHAKE (HSKo) 8 CLEAR TO SEND (CTS) INPUT HANDSHAKE (HSKi) 9 NOT CON..