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7.9.3 Host Terminating Read DMA
DMARQ
DMACK-
STOP
HDMARDY-
DSTROBE
DD(15:0)
Table 30: Ultra DMA cycle timings (Host Terminating Read)
PARAMETER
DESCRIPTION
tRFS
HDMARDY- to final
DSTROBE time
tRP
Ready to pause time
tLI
Limited interlock time
tAZ
Maximum time allowed for
output drivers to release
tZAH
Minimum delay time
required for output
tMLI
Interlock time with mini-
mum
tDS
CRC word setup time at
device
tDH
CRC word hold time at
device
tACK
Hold time for DMACK-
negation
tIORDYZ
Maximum time before
releasing IORDY
tLI
tRP
tRFS
tLI
xxx RD Data
xxxxxxxxxxxxxxxxxx
Device drives DD
MODE 0
MODE 1
MIN
MAX
MIN
(ns)
(ns)
(ns)
–
75
–
160
–
125
0
150
0
–
10
–
20
–
20
20
–
20
15
–
10
5
–
5
20
–
20
–
20
–
Travelstar 5K80 Hard Disk Drive Specification
45
tMLI
tIORDYZ
tAZ
tDS
xxx
CRC
tZAH
Host drives DD
MODE 2
MODE 3
MAX
MIN
MAX
MIN
(ns)
(ns)
(ns)
(ns)
70
–
60
–
–
100
–
100
150
0
150
0
10
–
10
–
–
20
–
20
–
20
–
20
–
7
–
7
–
5
–
5
–
20
–
20
20
–
20
–
tACK
tACK
tDH
xxxxxxxxxx
MODE 4
MAX
MIN
MAX
MIN
(ns)
(ns)
(ns)
(ns)
60
–
60
–
100
–
85
100
0
100
10
–
10
–
20
–
20
–
20
–
20
–
5
–
–
5
–
4.6
–
20
–
20
20
–
20
MODE 5
MAX
(ns)
–
50
–
0
75
–
10
–
–
4
–
–
–
–
20
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