Hitachi DK23EA Specifications - Page 93

Host pausing an Ultra DMA Read

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Figure 6-10 Host pausing an Ultra DMA Read DMARQ (device) DMACK(host) STOP tRP (host) HDMARDY(host) tRFS DSTROBE (device) DD(15:0) (device) Note: The host asserts STOP to request termination of the Ultra DMA burst no sooner than tRP after HDMARDY- is negated. SYMBOL tRFS tRP Mode 0(ns) Mode 1(ns) Mode 2(ns) Mode3(ns) MIN MAX MIN MAX MIN MAX MIN MAX 75 70 60 60 160 125 100 100 Mode4(ns) MIN MAX 60 100 Mode5(ns) Description MIN MAX 50 Ready-to-final STROBE time 85 Ready-to-pause time K6602637 Rev.3 02.27.01 - 93 -

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K6602637
Rev.3
02.27.01
- 93 -
Figure 6-10 Host pausing an Ultra DMA Read
DMARQ
(device)
DMACK-
(host)
STOP
(host)
HDMARDY-
(host)
DSTROBE
(device)
DD(15:0)
(device)
t
RFS
t
RP
Note:
The host asserts STOP to request termination of the Ultra DMA burst no sooner than t
RP
after HDMARDY- is
negated.
Mode 0(ns)
Mode 1(ns)
Mode 2(ns)
Mode3(ns)
Mode4(ns)
Mode5(ns)
Description
SYMBOL
MIN
MAX
MIN
MAX
MIN
MAX MIN MAX
MIN
MAX
MIN
MAX
t
RFS
75
70
60
60
60
50
Ready-to-final STROBE
time
t
RP
160
125
100
100
100
85
Ready-to-pause time