Scsi Bus Data & Information Phase Dt Timing Values - Fujitsu MAN3184 SERIES Specifications
Disk drives scsi physical interface specifications
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Also See for MAN3184 SERIES:
- Installation manual (2 pages) ,
- Installation manual (2 pages)
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Table 1.17
Timing description
1
ATN Transmit Setup Time
2
ATN Receive Setup Time
3
Cable Skew (6)
4
PCRC Receive Hold Time
5
PCRC Receive Setup Time
6
PCRC Transmit Hold Time
7
PCRC Transmit Setup Time
8
Receive Assertion Period (7)
9
Receive Hold Time (7)
10
Receive Negation Period (7)
11
Receive Setup Time (7)
12
Receive REQ (ACK) Period Tolerance
Receive REQ Assertion Period with P_CRCA
13
transitioning
Receive REQ Negation Period with P_CRCA
14
transitioning
15
Signal Timing Skew
16
REQ (ACK) Period
17
Transmit Assertion Period (7)
18
Transmit Hold Time (7)
19
Transmit Negation Period (7)
20
Transmit Setup Time (7)
21
Transmit REQ (ACK) Period Tolerance
Transmit REQ Assertion Period with P_CRCA
22
transitioning
Transmit REQ Negation Period with P_CRCA
23
transitioning
Note: (6) Cable Skew is measured at each device connection with the transmitted skew subtracted from the
received skew. (7) See Fig.1-20 for measurement points for the timing specifications. (8) SCSI bus
timing values specified by the maximum transfer rate for the given range shall apply even if a
slower transfer rate within the given range is negotiated.
(1)
ATN transmit setup time
The minimum time provided by the transmitter between the assertion of the ATN signal and the
negation of the ACK signal.
Specified to provide the increased ATN receive setup time, subject to intersymbol interference,
cable skew, and other distortions.
(2)
ATN receive setup time
The minimum time required at the receiver between the assertion of the ATN signal and the
negation of the ACK signal to recognize the assertion of an Attention Condition.
Specified to ease receiver timing requirements.
SCSI bus data & information phase DT timing values
C141-E123-01EN
Timing values [ns] (8)
Type
Fast-10
Fast-20
min.
48.4
min.
13.6
max.
4
min.
11.6
min.
18.6
min.
38.4
min.
48.4
min.
80
min.
11.6
min.
80
min.
11.6
max.
0.7
min.
85.5
min.
85.5
max.
26.8
min.
200
min.
92
min.
38.4
min.
92
min.
38.4
max.
0.6
min.
97.5
min.
97.5
Fast-40
Fast-80
29.2
19.6
7.8
4.9
3
2.5
5.8
2.9
12.8
9.9
19.2
9.6
29.2
19.6
40
20
5.8
2.9
40
20
5.8
2.9
0.7
0.7
48
32.5
48
32.5
13.4
6.7
100
50
46
23
19.2
9.6
46
23
19.2
9.6
0.6
0.6
54
35.5
54
35.5
1 - 29
14.8
3.45
2.5
1.45
8.45
4.8
14.8
8.5
1.45
8.5
1.45
0.7
21
21
3.35
25
11.5
4.8
11.5
4.8
0.6
24
24
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