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DISK DRIVE OPERATION
SpinPoint V40 Product Manual
99
6.7.4.4 Host pausing an Ultra DMA data in burst
The values for the timings for each of the Ultra DMA modes are contained in 6.7.4.2.
DMARQ
(device)
DMACK-
(host)
STOP
(host)
HDMARDY-
(host)
DSTROBE
(device)
DD(15:0)
(device)
t
SR
t
RFS
t
RP
NOTES
−
1 The host may assert STOP to request termination of the Ultra DMA burst no sooner than
t
RP
after HDMARDY- is negated.
2 If the t
SR
timing is not satisfied, the host may receive zero, one, or two more data words
from the device.
Figure 6-6 Host pausing an Ultra DMA data in burst