IBM DJSA-210 Hard Drive Specifications - Page 68
Device Pausing Write DMA, HSTROBE, DDMARDY, DMACK, DMARQ
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7.9.4 Device Pausing Write DMA DMARQ DMACK- STOP DDMARDYHSTROBE 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 HSTROBE to DDMARDY- time - 50 - 30 - 20 - - - - tRFS DDMARDY- to final HSTROBE time - 75 - 70 - 60 - 60 - 60 Note: When a device does not satisfy the tSR timing, the device is ready to receive two more data words after DDMARDY- is negated. Figure 43. Ultra DMA cycle timings (Device Pausing Write) Travelstar 32GH/30GT/20GN hard disk drive specifications 54
7.9.4
Device Pausing Write DMA
HSTROBE
DDMARDY-
DMACK-
DMARQ
tSR
STOP
tRFS
60
–
60
–
60
–
70
–
75
–
DDMARDY- to final HSTROBE time
tRFS
–
–
–
–
20
–
30
–
50
–
HSTROBE to DDMARDY- 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 device does not satisfy the tSR timing, the device is ready to receive two more data words
after
DDMARDY-
is negated.
Figure 43. Ultra DMA cycle timings (Device Pausing Write)
Travelstar 32GH/30GT/20GN hard disk drive specifications
54