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Parallel SCSI Interface Product Manual, Rev. A
iii
Revision st
atus summary sheet
Revision
Date
Writer/Engin
eer
Sheets Affected
Rev
. A
03/27/06
C. Chalupa/G
. Houlder
All.
1
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185
186
Parallel SCSI Interface
1
Revision status summary sheet
5
Table of Contents
7
List of Figures
13
1.0 Interface requirements
15
standards
16
1.4 Summary of SCSI messages
26
2.0 SCSI bus
27
2.1 SCSI bus signals overview
29
2.2 Signal states
31
2.3 OR-tied signals
32
2.4 Signal sources
33
2.5 SCSI bus timing
34
0 0.5 0 0.2
39
induced time asymmetry
39
due to resis
43
2.6 Measurement points
47
2.9 Data transfer modes
51
2.12 Negotiation
53
PPR, SDTR Less than or equal
55
2.12.4 Transfer agreements
56
Table 13: Transfer agreements
56
bit shall be set to zero
61
Transfer
62
3.0 Logical characteristics
65
3.2 SELECTION phase
69
3.3 RESELECTION phase
72
3.4 SCSI bus fairness
73
3.6 COMMAND phase
89
3.7 DATA phase
89
3.8 STATUS phase
90
3.9 MESSAGE phase
90
3.11 SCSI bus phase sequences
92
3.12 Data bus protection
95
4.2 Message formats
97
4.3 Message categories
99
7 6 5 4 3 2 1 0
101
0 IDENTIFY DISCPRIV LUN
101
Target’s Parallel Protocol
109
4.4 Task attribute messages
116
4.5 Task management messages
119
5.1 Attention condition
121
5.2 Bus reset condition
122
5.3 Hard reset
122
5.4 Reset events
123
6.0 SPI information units
127
[3] See Figure 16
129
[4] See Figure 18
129
[3] See Figure 18
130
6.2 SPI information units
132
field shall be reserved
135
field is not zero
135
129
143
7.0 SCSI commands
145
See notes following Table 61
148
7.3 Status
152
7.4 Command examples
154
7.5 Timing examples
156
7.8 Parameter rounding
163
8.0 Drive features
165
Command, Message, and Status
168
(Bits 14
171
Seagate Technology LLC
186
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