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9.1.7.3 Host Terminating Read DMA
DSTROBE
HDMARDY-
DMACK-
DMARQ
STOP
tMLI
tRP
DD00–DD15
tZAH
xxxxxxxxxxxxxxxxxx
xxx
Host drives DD
Device drives DD
tCH
tCS
CRC
tLI
tACK
tACK
tRFS
tLI
xxx
RD Data
xxxxxxxxxx
tAZ
tIORDYZ
(all values are in ns)
20
–
20
–
20
–
20
–
20
–
20
–
Pull-up time before DSTROBE
release
tIORDYZ
–
20
–
20
–
20
–
20
–
20
–
20
Hold time after -DMACK
negation
tACK
–
5
–
5
–
5
–
5
–
5
–
5
CRC word Hold time (at device
side)
tCH
–
5
–
5
–
7
–
7
–
10
–
15
CRC word setup time (at
device side)
tCS
–
20
–
20
–
20
–
20
–
20
–
20
Interlocking time
tMLI
–
20
–
20
–
20
–
20
–
20
–
20
Output enable time
tZAH
10
–
10
–
10
–
10
–
10
–
10
–
Output release time
tAZ
75
0
100
0
100
0
150
0
150
0
150
0
Limited interlock time
tLI
–
85
–
100
–
100
–
100
–
125
–
160
Ready to pause time
tRP
50
–
60
–
60
–
60
–
70
–
75
–
Ready to final strobe time
tRFS
MAX
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
MIN
Parameter descriptions
MODE5
MODE4
MODE3
MODE2
MODE1
MODE0
Signal
names
Figure 29. Ultra DMA cycle timings—Host terminating Read
Deskstar 60 GXP Hard disk drive specification
34
Содержание IC35L020 - Deskstar 20 GB Hard Drive
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