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6.2.4.5 Initiating Write DMA
HSTROBE
DDMARDY-
DMACK-
DMARQ
STOP
tUI
tACK
tENV
tZIORDY
tLI
tUI
tCYC
tCYC
t2CYC
DD(15:0)
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
xxx
xxx
Host drives DD
tDH
tDS
WT Data
WT Data
WT Data
tACK
tDH
tDS
Figure 35. Ultra DMA cycle timing chart (Initiating Write)
–
4.6
–
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
–
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
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–
tACK
–
0
–
0
–
0
–
0
–
0
–
0
Unlimited interlock time
tUI
MAX
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MODE5
MODE4
MODE3
MODE2
MODE1
MODE0
PARAMETER DESCRIPTION
(all values in ns)
Figure 36. Ultra DMA cycle timings (Initiating Write)
Deskstar 120GXP hard disk drive specifications
34
Содержание Deskstar 120 GXP
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