Chapter 3
External Connectors
SCSI Port, Ultra 3, 68-Pin
24
10 S10 (+DB 4) 44 S44 (-DB 4)
11 S11 (+DB5) 45 S45 (-DB 5)
12 S12 (+DB 6) 46 S46 (-DB 6)
13 S13 (+DB 7) 47 S47 (-DB 7)
14 S14 (+DB P) 48 S48 (-DB P)
15 S15 49 S49
16 S16 (DIFFSENS) 50 S50
17 S17 (TERMPWR) 51 S51 (TERMPWR)
18 S18 (TERMPWR) 52 S52 (TERMPWR)
19 S19 (RESERVED) 53 S53 (RESERVED)
20 S20 54 S54
21 S21 (+ATN) 55 S55 (-ATN)
22 S22 56 S56
23 S23 (+BSY) 57 S57 (-BSY)
24 S24 (+ACK) 58 S58 (-ACK)
25 S25 (+RST) 59 S59 (-RST)
26 S26 (+MSG) 60 S60 (-MSG)
27 S27 (+SEL) 61 S61 (-SEL)
28 S28 (+C/D) 62 S62 (-C/D)
29 S29 (+REQ) 63 S63 (-REQ)
30 S30 (+I/O) 64 S64 (-I/O)
31 S31 (+DB 8) 65 S65 (-DB 8)
32 S32 (+DB 9) 66 S66 (-DB 9)
33 S33 (DB 10) 67 S67 (-DB 10)
34 S34 (DB 11) 68 S68 (-DB 11)
Table 3-3 SCSI Port Pinouts (Continued)
Pin Number Signal Description Pin Number Signal Description
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