IBM IC25N020ATDA04 - Travelstar 20 GB Hard Drive - Host Terminating Read DMA; Figure 45. Ultra DMA Cycle Timing (Host Terminating Read)

7.9.3 Host Terminating Read DMA
DSTROBE
HDMARDY-
DMACK-
DMARQ
STOP
tMLI
tRP
DD(15:0)
tZAH
xxxxxxxxxxxxxxxxxx
xxx
Device drives DD
Host drives DD
tCH
tCS
CRC
tACK
tACK
tRFS
tLI tIORDYZ
xxx RD Data xxxxxxxxxxx
tAZ
tLI
20–20–20–20–20–20–
Maximum time before releasing
IORDY
tIORDYZ
–
20
–
20
–
20
–
20
–
20
–
20
Hold time for DMACK-
tACK
–
4.6
–
5
–
5
–
5
–
5
–
5
CRC word hold time at device
tCH
–
4
–
5
–
7
–
7
–
10
–
15
CRC word setup time at device
tCS
–
20
–
20
–
20
–
20
–
20
–
20
Interlock time with minimum
tMLI
–20–20–20–20–20–20
Minimum delay time required for
output
tZAH
10–10–10–10–10–10–
Maximum time allowed for
output drivers to release
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–
HDMARDY- to final DSTROBE
time
tRFS
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 45. Ultra DMA cycle timing (Host Terminating Read)
Travelstar 48GH, 30GN & 15GN hard disk drive specifications
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