Sun Microsystems Ultra 1 140, Руководство по обслуживанию

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B-2 Sun Ultra 1 Series Service Manual—November 1995
B
B.1.2 Serial Ports A and B (RS-422/RS-232)
These connectors are located on the back panel of system board.
Figure B-2 Serial Ports A and B Connector
Table B-2 Serial Ports Pin Assignments
Pin Signal Name Description Pin Signal Name Description
1 Not connected none 14 Not connected none
2 Transmit Data TxD 15 Transmit Clock TRxC
3 Receive Data RxD 16 Not connected none
4 Ready To Send RTS 17 Receive Clock RTxC
5 Clear To Send CTS 18 Not connected none
6 Data Set Ready DSR 19 Not connected none
7 Signal Ground Gnd 20 Data Terminal
Ready DTR
8 Data Carrier Detect DCD 21 Not connected none
9 Not connected none 22 Not connected none
10 Not connected none 23 Not connected none
11 Not connected none 24 Transmit Clock TxC
12 Not connected none 25 Not connected none
13 Not connected none
13
25
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