214 SPARCstation 20 Service Manual • July 1996
28 sd2* I/O TTL SCSI data bit 2
29 sd3* I/O TTL SCSI data bit 3
30 sd4* I/O TTL SCSI data bit 4
31 sd5* I/O TTL SCSI data bit 5
32 sd6* I/O TTL SCSI data bit 6
33 sd7* I/O TTL SCSI data bit 7
34 sdp* I/O TTL SCSI data parity
35 Ground None GND Ground
36 Ground None GND Ground
37 Ground None GND Ground
38 Termpower I/O TTL Termination voltage
39 Ground None GND Ground
40 Ground None GND Ground
41 atn* O TTL Attention
42 Ground None GND Ground
43 bsy* O TTL Busy
44 ack* O TTL Acknowledge
45 rst* O TTL Reset
46 msg* O TTL Message
47 sel* O TTL Select
48 cd* O TTL Control/data
TABLE C-6 SCSI Connector Pin Assignments (Continued)
Pin Function I/O Level Signal Description
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