MSI Master LS2 User Guide - Page 35

Ultra320 SCSI Connectors: SCSI 1/2

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MS-9121 E-ATX Mainboard Ultra320 SCSI Connectors: SCSI 1/2 SCSI (Small Computer System Interface) is a hardware interface that allows for connection of up to 15 peripheral devices. The mainboard provides onboard dual SCSI channels (SCSI 1 & SCSI 2) for you to connect SCSI devices such as SCSI hard disks. SCSI 1 SCSI 2 2-20 34 1 68 26 68-Pin Ultra320 SCSI Connector Pin Description 1 +DB(12) 2 +DB(13) 3 +DB(14) 4 +DB(15) 5 +DB(P1) 6 +DB(0) 7 +DB(1) 8 +DB(2) 9 +DB(3) 10 +DB(4) 11 +DB(5) 12 +DB(6) 13 +DB(7) 14 +DB(P) 15 GROUND 16 DIFFSENS 17 TERMPWR 18 TERMPWR 19 RESERVED 20 GROUND 21 +ATN 22 GROUND 23 +BSY 24 +ACK 25 +RST 26 +MSG 27 +SEL 28 +C/D 29 +REQ 30 +I/O 31 +DB(8) 32 +DB(9) 33 +DB(10) 34 +DB(11) Pin Description 35 -DB(12) 36 -DB(13) 37 -DB(14) 38 -DB(15) 39 -DB(P1) 40 -DB(0) 41 -DB(1) 42 -DB(2) 43 -DB(3) 44 -DB(4) 45 -DB(5) 46 -DB(6) 47 -DB(7) 48 -DB(P) 49 GROUND 50 GROUND 51 TERMPWR 52 TERMPWR 53 RESERVED 54 GROUND 55 -ATN 56 GROUND 57 -BSY 58 -ACK 59 -RST 60 -MST 61 -SEL 62 -C/D 63 -REQ 64 -I/O 65 -DB(8) 66 -DB(9) 67 -DB(10) 68 -DB(11)

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2-20
MS-9121 E-ATX Mainboard
Ultra320 SCSI Connectors: SCSI 1/2
SCSI (Small Computer System Interface) is a hardware interface that
allows for connection of up to 15 peripheral devices.
The mainboard pro-
vides onboard dual SCSI channels (SCSI 1 & SCSI 2) for you to connect
SCSI devices such as SCSI hard disks.
1
26
34
68
Pin
Description
Pin
Description
1
+DB(12)
35
-DB(12)
2
+DB(13)
36
-DB(13)
3
+DB(14)
37
-DB(14)
4
+DB(15)
38
-DB(15)
5
+DB(P1)
39
-DB(P1)
6
+DB(0)
40
-DB(0)
7
+DB(1)
41
-DB(1)
8
+DB(2)
42
-DB(2)
9
+DB(3)
43
-DB(3)
10
+DB(4)
44
-DB(4)
11
+DB(5)
45
-DB(5)
12
+DB(6)
46
-DB(6)
13
+DB(7)
47
-DB(7)
14
+DB(P)
48
-DB(P)
15
GROUND
49
GROUND
16
DIFFSENS
50
GROUND
17
TERMPWR
51
TERMPWR
18
TERMPWR
52
TERMPWR
19
RESERVED
53
RESERVED
20
GROUND
54
GROUND
21
+ATN
55
-ATN
22
GROUND
56
GROUND
23
+BSY
57
-BSY
24
+ACK
58
-ACK
25
+RST
59
-RST
26
+MSG
60
-MST
27
+SEL
61
-SEL
28
+C/D
62
-C/D
29
+REQ
63
-REQ
30
+I/O
64
-I/O
31
+DB(8)
65
-DB(8)
32
+DB(9)
66
-DB(9)
33
+DB(10)
67
-DB(10)
34
+DB(11)
68
-DB(11)
68-Pin Ultra320 SCSI Connector
SCSI 1
SCSI 2