Data General AViiON 5500 Series, Установка, расширение и обслуживание

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Integrated I/O connectors and signals
A-6
014–002250–01
Synchronous serial port connector
Synchronous devices connect through the 25-pin female
D–connector (DB25) located on the back of the computer unit,
labeled
SYNC
.
Figure A–2 shows the pin numbers for the synchronous
communications connector; Table A–2 lists the signals.
14
13
1
25
female connector
Figure A–2 Synchronous serial port connector signals
Table A–2 Synchronous (SYNC) port signals
Pin Signal Direction
1 Chassis Ground n/a
2 Transmit Data (TxD) Out
3 Receive Data (RCD) In
4 Request to Send (RTS) Out
5 Clear to Send (CTS) In
6 Data Set Ready (DSR) In
7 Signal Ground (SG) Both
8 Data Carrier Detect (DCD) In
15 Transmit Timing (Tx Clock) In
17 Receive Timing (RCV Clock) In
20 Data Terminal Ready (DTR) Out
22 Ring Indicator (RI) In
24 Terminal Signal Timing (SC) Out