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DISK DRIVE OPERATION
SpinPoint V40 Product Manual
104
6.7.4.9 Device pausing an Ultra DMA data out 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)
DDMARDY-
(device)
HSTROBE
(host)
DD(15:0)
(host)
t
SR
t
RFS
t
RP
NOTES
−
1 The device may negate DMARQ to request termination of the Ultra DMA burst no sooner
than t
RP
after DDMARDY- is negated.
2 If the t
SR
timing is not statisfied, the device may receive zero, one, or two more data
words from the host.
Figure 6-11 Device pausing an Ultra DMA data out burst