IBM IC25N020ATDA04 - Travelstar 20 GB Hard Drive - Initiating Write DMA; Figure 47. Ultra DMA Cycle Timings (Initiating Write)

7.9.5 Initiating Write DMA
HSTROBE
DDMARDY-
DMACK-
DMARQ
STOP
tUI
tACK
tENV
tZIORDY
tLI
tUI tCYC
t2CYC
DD(15:0)
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xxx xxx
Host drives DD
tDH
tDS
WT Data
WT Data
WT Data
tACK
tCYC
–
4.6
–
5
–
5
–
5
–
5
–
5
Data Hold time at device
tDH
–
4
–
5
–
7
–
7
–
10
–
15
Data setup time at device
tDS
–
38
–
57
–
86
–
115
–
154
–
230
Two cycle time
t2CYC
–
16.8
–
25
–
39
–
54
–
73
–
112
Cycle time
tCYC
75
0
100
0
100
0
150
0
150
0
150
0
Limited interlock time
tLI
–0–0–0–0–0–0
Minimum time before driving
IORDY
tZIORDY
55
20
55
20
55
20
70
20
70
20
70
20
Envelope time
tENV
–
20
–
20
–
20
–
20
–
20
–
20
Setup time for DMACK-
tACK
–
0
–
0
–
0
–
0
–
0
–
0
Unlimited interlock time
tUI
MAX
(ns)
MIN
(ns)
MAX
(ns)
MIN
(ns)
MAX
(ns)
MIN
(ns)
MAX
(ns)
MIN
(ns)
MAX
(ns)
MIN
(ns)
MAX
(ns)
MIN
(ns)
MODE 5
MODE 4
MODE 3
MODE 2
MODE 1
MODE 0
PARAMETER DESCRIPTION
Figure 47. Ultra DMA cycle timings (Initiating Write)
Travelstar 48GH, 30GN & 15GN hard disk drive specifications
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