Motorola MVME2700 Series Manuel de service télécharger pdf (Page 187)

EIA-232-D Connections

http://www.motorola.com/computer/literature B-3

computer must be configured as a modem and the other as a

terminal.

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

Number

Signal

Mnemonic

Signal Name and Description

1Not used.

2TxDTransmit Data. Data to be transmitted; input to modem

from terminal.

3RxDReceive Data. Data which is demodulated from the

receive line; output from modem to terminal.

4RTSRequest 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.

5CTSClear 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.

6DSRData Set Ready. Output from modem to terminal to

indicate that the modem is ready to send or receive data.

7SGSignal Ground. Common return line for all signals at the

modem interface.

8DCDData 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.

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Motorola MVME2700 Series Manuel de service Page 187