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DISK DRIVE OPERATION
SpinPoint V40 Product Manual
103
6.7.4.8 Sustained Ultra DMA data out burst
The values for the timings for each of the Ultra DMA modes are contained in 6.7.4.2.
t
DH
t
DS
t
DVH
HSTROBE
at host
DD(15:0)
at host
HSTROBE
at device
DD(15:0)
at device
t
DVH
t
CYC
t
CYC
t
DVS
t
DVS
t
DS
t
DH
t
2CYC
t
DH
t
DVH
t
2CYC
NOTE − DD(15:0) and HSTROBE signals are shown at both the device and the host to emphasize
that cable settling time as well as cable propagation delay shall not allow the data signals to be
considered stable at the device until some time after they are driven by the host.
Figure 6-10 Sustained Ultra DMA data out burst