Sun Microsystems SPARC classic X, Service Manual

Page: 175 / 198

Appendix B System Connectors B-7
Note – Pin 38 is +5V, fused and supplied by a schottkey diode.
B.7 Serial Connector
FIGURE B-7
Serial Connector
23 Ground 48 cd*
24 Ground 49 req*
25 Ground 50 io*
TABLE B-7
Pinout for Serial Connector
Pin Description Pin Description
1 N/C 14 B Transmit Data
2 A Transmit Data 15 A Transmit Clock (DCE source)
3 A Receive Data 16 B Receive Data
4 A Request to Send 17 A Receive Clock
5 A Clear to Send 18 B Transmit Clock (DCE source)
6 A Data Set Ready 19 B Request to Send
7 Signal Ground 20 A Data Terminal Ready
8 A Carrier Detect 21 N/C
9 N/C 22 N/C
10 N/C 23 N/C
11 B Data Terminal Ready 24 A Transmit Clock (DTE source)
12 B Carrier Detect 25 B Transmit Clock (DTE source)
13 B Clear to Send
TABLE B-6
Pinout for External SCSI Connector (Continued)
Pin Description Pin Description
1 13
25 14