Synchronous/Asynchronous Communications Port Pin-Outs - Digital Equipment DEC 3000 500X AXP Owner's Manual

Synchronous/Asynchronous Communications Port
Synchronous/ Figure B–2 shows the pin layout for the
Asynchronous synchronous/asynchronous communications port.
Communication
Port Diagram
Figure B–2 Synchronous/Asynchronous Communications Port
Table B–2 describes pin usage for the synchronous/asynchronous
Synchronous/
Asynchronous communications port.
Communications
Port Pin-outs
Table B–2 Synchronous/Asynchronous Communications Port
Pin
1
2
3
4
5
6
7
1
international consultative committee that sets international communications
standards.
2
Synchronous/Asynchronous Communications Port
1
14
Pin-outs
Source Signal
GND
KN15 TX
Modem/printer RX
KN15 RTS
Modem/printer CTS
Modem/printer DSR
GND
International Telegraph and Telephone Consultative Commiittee (CCITT), an
Electronic Industries Association
13
25
MLO-008585
1 2
CCITT EIA Description
102 AB Signal ground
103 BA Modem transmitted
data
104 BB Modem received data
105 CA Request to send
106 CB Clear to send
107 CC Data set ready
102 AB Signal ground
(continued on next page)
Port Pin-outs B–3