2 the scsi interface, The scsi interface, Scsi interface – LSI 20160 User Manual
Page 45: Table 3.4
Operational Environment
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Copyright © 2001 by LSI Logic Corporation. All rights reserved.
3.2.2 The SCSI Interface
The SCSI interface conforms to ANSI X 3T10.11/1142. The SCSI
interface operates as 16-bit, synchronous or asynchronous, SE or LVD,
and supports Ultra160 SCSI protocols. Arbitration is supported for 8-bit
(at lower SCSI speeds) and 16-bit. Active SE or LVD SCSI termination
is provided automatically. The LSI20160 supplies the SCSI termination
power.
Connector J2 makes the external connection, which provides LVD/SE
SCSI termination. Connector J4 makes the internal connection, which
only provides LVD SCSI termination.
shows the signal assignments for J2 and J4.
Table 3.4
SCSI Interface
Signal Name
Pin
Signal Name
Pin
Signal Name
Pin
SD12+
1
SACK+
24
SD7
−
47
SD13+
2
SRST+
25
SDP
−
48
SD14+
3
SMSG+
26
GND
49
SD15+
4
SSEL+
27
Cable_prnt
50
SDP1+
5
SC_D+
28
TERMPWR
51
SD0+
6
SREQ+
29
TERMPWR
52
SD1+
7
SI_O+
30
N/C
53
SD2+
8
SD8+
31
GND
54
SD3+
9
SD9+
32
SATN
−
55
SD4+
10
SD10+
33
GND
56
SD5+
11
SD11+
34
SBSY
−
57
SD6+
12
SD12
−
35
SACK
−
58
SD7+
13
SD13
−
36
SRST
−
59
SDP+
14
SD14
−
37
SMSG
−
60
GND
15
SD15
−
38
SSEL
−
61
DIFFSENS
16
SDP1
−
39
SC_D
−
62
TERMPWR
17
SD0
−
40
SREQ
−
63
TERMPWR
18
SD1
−
41
SI_O
−
64
N/C
19
SD2
−
42
SD8
−
65
GND
20
SD3
−
43
SD9
−
66
SATN+
21
SD4
−
44
SD10
−
67
GND
22
SD5
−
45
SD11
−
68
SBSY+
23
SD6
−
46