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7.9.2 Host Pausing Read DMA
DMARQ
DMACK-
STOP
HDMARDY-
DSTROBE
PARAMETER DESCRIPTION
tSR
DSTROBE to HDMARDY-
time
tRFS
HDMARDY- to final
DSTROBE time
Note: When a host does not satisfy the tSR timing, the host should be ready to receive two more data
words after HDMARDY- is negated.
Figure 41. Ultra DMA cycle timings (Host Pausing Read)
tSR
MODE 0
MIN
MAX
(ns)
(ns)
–
50
–
75
Hitachi Travelstar 60GH & 40GN hard disk drive specifications
tRFS
MODE 1
MODE 2
MIN
MAX
MIN
MAX
(ns)
(ns)
(ns)
(ns)
–
30
–
20
–
70
–
60
51
MODE 3
MODE 4
MODE 5
MIN
MAX
MIN
MAX
MIN
(ns)
(ns)
(ns)
(ns)
(ns)
–
–
–
–
–
60
–
60
MAX
(ns)
–
–
–
50
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