6.2.4.5 Initiating Write DMA
DMARQ
DMACK-
STOP
DDMARDY-
HSTROBE
DD(15:0)
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Figure 35. Ultra DMA cycle timing chart (Initiating Write)
PARAMETER DESCRIPTION
(all values in ns)
tUI
Unlimited interlock time
tACK
Setup time before DMACK–
tENV
Envelope time
Minimum time before driving
tZIORDY
IORDY
tLI
Limited interlock time
tCYC
Cycle time
t2CYC
Two Cycle time
tDS
Data setup time (at device side)
tDH
Data hold time (at device side)
Figure 36. Ultra DMA cycle timings (Initiating Write)
tUI
tACK
tZIORDY
tACK
MODE0
MIN
0
20
20
0
0
112
230
15
5
Deskstar 180GXP hard disk drive specifications
tENV
tLI
tUI
tDS
WT Data
Host drives DD
MODE1
MODE2
MAX
MIN
MAX
MIN
–
0
–
0
–
20
–
20
70
20
70
20
–
0
–
0
150
0
150
0
–
73
–
54
–
154
–
115
–
10
–
7
–
5
–
5
34
t2CYC
tCYC
tCYC
tDH
xxx
xxx
WT Data
MODE3
MODE4
MAX
MIN
MAX
MIN
MAX
–
0
–
0
–
20
–
20
70
20
55
20
–
0
–
0
150
0
100
0
–
39
–
25
–
86
–
57
–
7
–
5
–
5
–
5
tDS
tDH
WT Data
MODE5
MIN
MAX
–
0
–
–
20
–
55
20
50
–
0
–
100
0
75
–
16.8
–
–
38
–
–
4
–
–
4.6
–