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9.1.7.5 Initiating Write DMA
DSTROBE
HDMARDY-
DMACK-
DMARQ
STOP
tUI
tACK
tENV
tZIORDY
tLI
tUI
tCYC
tCYC
t2CYC
DD00–DD15
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
xxx
xxx
Host drives DD
tDH
tDS
WT Data
WT Data
WT Data
tACK
(all values are in ns)
–
5
–
5
–
5
–
5
–
5
–
5
Data hold time (at device side)
tDH
–
4
–
5
–
7
–
7
–
10
–
15
Data setup time (at device side)
tDS
–
38
–
57
–
86
–
115
–
153
–
230
2 Cycle time
t2CYC
–
17
–
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
Wait time before driving
DSTROBE
tZIORDY
50
20
55
20
55
20
70
20
70
20
70
20
Envelope time
tENV
–
20
–
20
–
20
–
20
–
20
–
20
Setup time before -DMACK
assertion
tACK
–
0
–
0
–
0
–
0
–
0
–
0
Unlimited interlock time
tUI
MAX
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
MIN
Parameter descriptions
MODE5
MODE4
MODE3
MODE2
MODE1
MODE0
Signal
names
Figure 31. Ultra DMA cycle timings—Initiating Write
Deskstar 60 GXP Hard disk drive specification
36
Содержание IC35L020 - Deskstar 20 GB Hard Drive
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