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X7DB8/X7DBE User's Manual
Ultra 320 SCSI
Connectors (*X7DB8
only)
There are two SCSI
connectors on the
motherboard. SCSI
Channel A is located at
JA1, and SCSI Channel B
is located at JA2. Refer
to the table below for the
pin defi nitions of the Ultra
320 SCSI connectors
located at JA1 and JA2.
A. SCSI Channel A
B. SCSI Channel B
Ultra320 SCSI Drive Connector
Pin Defi nitions (J28)
Pin#
Defi nition
Pin #
1
+DB (12)
35
2
+DB (13)
36
3
+DB (14)
37
4
+DB (15)
38
5
+DB (P1)
39
6
+DB (0)
40
7
+DB (1)
41
8
+DB (2)
42
9
+DB (3)
43
10
+DB (4)
44
11
+DB (5)
45
12
+DB (6)
46
13
+DB (7)
47
14
+DB (P)
48
15
Ground
49
16
DIFFSENS
50
17
TERMPWR
51
18
TERMPWR
52
19
Reserved
53
20
Ground
54
21
+ATN
55
22
Ground
56
23
+BSY
57
24
+ACK
58
25
+RST
59
26
+MSG
60
27
+SEL
61
28
+C/D
62
29
+REQ
63
30
+I/O
64
31
+DB (8)
65
32
+DB (9)
66
33
+DB (10)
67
34
+DB (11)
68
A
B
2-34
Defi nition
-DB (12)
-DB (13)
-DB (14)
-DB (15)
-DB (P1)
-DB (0)
-DB (1)
-DB (2)
-DB (3)
-DB (4)
-DB (5)
-DB (6)
-DB (7)
-DB (P)
Ground
Ground
TERMPWR
TERMPWR
Reserved
Ground
-ATN
Ground
-BSY
-ACK
-RST
-MSG
-SEL
-C/D
-REQ
-I/O
-DB (8)
-DB (9)
-DB (10)
-DB (11)
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