6.2.4.2 Host Pausing Read DMA
DSTROBE
HDMARDY-
DMACK-
DMARQ
tSR
STOP
tRFS
Figure 29. Ultra DMA cycle timing chart (Host pausing Read)
50
–
60
–
60
–
60
–
70
–
75
–
HDMARDY– to final DSTROBE time
tRFS
–
–
–
–
–
–
20
–
30
–
50
–
DSTROBE to HDMARDY– time
tSR
MAX
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MODE5
MODE4
MODE3
MODE2
MODE1
MODE0
PARAMETER DESCRIPTION
(all values in ns)
Note: When a host does not satisfy tSR timing, it should be ready to receive two more data words after
HDMARDY– is negated.
Figure 30. Ultra DMA cycle timings (Host pausing Read)
Deskstar 120GXP hard disk drive specifications
31
Содержание Deskstar 120 GXP
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