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7.9.4 Device Terminating Read DMA
DSTROBE
HDMARDY-
DMACK-
DMARQ
STOP
tMLI
DD(15:0)
tZAH
xxxxxxxxxxxxxxxxxx
Device drives DD
Host drives DD
tDH
tDS
CRC
tACK
tACK
tLI
tIORDYZ
xxxxxx
xxxxxxxxxx
tSS
tLI
tLI
tAZ
–
–
20
–
20
–
20
–
20
–
20
–
Maximum time before releasing
IORDY
tIORDYZ
–
–
–
20
–
20
–
20
–
20
–
20
Hold time for DMACK-
tACK
–
4.6
–
5
–
5
–
5
–
5
–
5
CRC word hold time at device
tDH
–
4
–
5
–
7
–
7
–
10
–
15
CRC word setup time at device
tDS
–
20
–
20
–
20
–
20
–
20
–
20
Interlock time with minimum
tMLI
–
20
–
20
–
20
–
20
–
20
–
20
Maximum 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
–
50
–
50
–
50
–
50
–
50
–
50
Time from DSTROBE edge to
negation of DMARQ
tSS
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 43. Ultra DMA cycle timings (Device Terminating Read)
Travelstar 60GH & 40GN hard disk drive specifications
53
Содержание IC25N040ATCS04 - Travelstar 40 GB Hard Drive
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