Motorola MVME2600 manual Table B-1. EIA-232-D Interconnect Signals

EIA-232-D Connections

Table B-1. EIA-232-D Interconnect Signals

Pin	Signal	Signal Name and Description
Number	Mnemonic
1		Not used.
2	TxD	Transmit Data. Data to be transmitted; input to modem from terminal.
3	RxD	Receive Data. Data which is demodulated from the receive line; output from
		modem to terminal.
4	RTS	Request To Send. Input to modem from terminal when required to transmit a
		message. With RTS off, the modem carrier remains off. When RTS is turned
		on, the modem immediately turns on the carrier.
5	CTS	Clear To Send. Output from modem to terminal to indicate that message
		transmission can begin. When a modem is used, CTS follows the off-to-on
		transition of RTS after a time delay.
6	DSR	Data Set Ready. Output from modem to terminal to indicate that the modem
		is ready to send or receive data.
7	SG	Signal Ground. Common return line for all signals at the modem interface.
8	DCD	Data Carrier Detect. Output from modem to terminal to indicate that a valid
		carrier is being received.
9-14		Not used.
15	TxC	Transmit Clock (DCE). Output from modem to terminal; clocks data from
		the terminal to the modem.
16		Not used.
17	RxC	Receive Clock. Output from terminal to modem; clocks input data from the
		terminal to the modem.
18, 19		Not used.
20	DTR	Data Terminal Ready. Input to modem from terminal; indicates that the
		terminal is ready to send or receive data.
21		Not used.

B

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