IBM DJSA-210 Hard Drive Specifications - Page 64
Host Pausing Read DMA, DSTROBE, HDMARDY, DMACK, DMARQ
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7.9.2 Host Pausing Read DMA DMARQ DMACK- STOP HDMARDYDSTROBE tSR tRFS MODE 0 MODE 1 MODE 2 MODE 3 MODE 4 PARAMETER DESCRIPTION MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX (ns) (ns) (ns) (ns) (ns) (ns) (ns) (ns) (ns) (ns) tSR DSTROBE to HDMARDY- time - 50 - 30 - 20 - - - - tRFS HDMARDY- to final DSTROBE time - 75 - 70 - 60 - 60 - 60 Note: When a host does not satisfy the tSR timing, the host should be ready to receive two more data words after HDMARDY-. Figure 39. Ultra DMA cycle timings (Host Pausing Read) Travelstar 32GH/30GT/20GN hard disk drive specifications 50
7.9.2
Host Pausing Read DMA
DSTROBE
HDMARDY-
DMACK-
DMARQ
tSR
STOP
tRFS
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)
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-.
Figure 39. Ultra DMA cycle timings (Host Pausing Read)
Travelstar 32GH/30GT/20GN hard disk drive specifications
50