Hitachi IC25N040ATCS04-0 Specifications - Page 64
Host Pausing Read DMA
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7.9.2 Host Pausing Read DMA DMARQ DMACK- STOP HDMARDYDSTROBE tSR tRFS tSR tRFS MODE 0 MODE 1 MODE 2 MODE 3 MODE 4 MODE 5 PARAMETER DESCRIPTION MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX (ns) (ns) (ns) (ns) (ns) (ns) (ns) (ns) (ns) (ns) (ns) (ns) DSTROBE to HDMARDYtime HDMARDY- to final DSTROBE time - 50 - 30 - 20 75 - 70 - 60 - 60 - 60 - 50 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) Hitachi Travelstar 60GH & 40GN hard disk drive specifications 51
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7.9.2 Host Pausing Read DMA
DSTROBE
HDMARDY-
DMACK-
DMARQ
tSR
STOP
tRFS
50
–
60
–
60
–
60
–
70
–
75
–
HDMARDY- to final
DSTROBE time
tRFS
–
–
–
–
–
–
20
–
30
–
50
–
DSTROBE to HDMARDY-
time
tSR
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
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)
Hitachi Travelstar 60GH & 40GN hard disk drive specifications
51