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Contents
xiv C141-E217
5.6.1 PIO data transfer...............................................................................5-149
5.6.2 Multiword data transfer ....................................................................5-150
5.6.3 Ultra DMA data transfer...................................................................5-151
5.6.3.1 Initiating an Ultra DMA data in burst ....................................5-151
5.6.3.2 Ultra DMA data burst timing requirements............................5-152
5.6.3.3 Sustained Ultra DMA data in burst........................................5-155
5.6.3.4 Host pausing an Ultra DMA data in burst ..............................5-156
5.6.3.5 Device terminating an Ultra DMA data in burst.....................5-157
5.6.3.6 Host terminating an Ultra DMA data in burst.........................5-158
5.6.3.7 Initiating an Ultra DMA data out burst ..................................5-159
5.6.3.8 Sustained Ultra DMA data out burst ......................................5-160
5.6.3.9 Device pausing an Ultra DMA data out burst.........................5-161
5.6.3.10 Host terminating an Ultra DMA data out burst.....................5-162
5.6.3.11 Device terminating an Ultra DMA data out burst .................5-163
5.6.4 Power-on and reset ...........................................................................5-164
CHAPTER 6 Operations .................................................................................6-1
6.1 Device Response to the Reset......................................................................... 6-2
6.1.1 Response to power-on ......................................................................... 6-2
6.1.2 Response to hardware reset.................................................................. 6-3
6.1.3 Response to software reset................................................................... 6-5
6.1.4 Response to diagnostic command ........................................................ 6-6
6.2 Power Save.................................................................................................... 6-7
6.2.1 Power save mode................................................................................. 6-7
6.2.2 Power commands ................................................................................ 6-9
6.3 Defect Processing........................................................................................... 6-9
6.3.1 Spare area............................................................................................ 6-9
6.3.2 Alternating processing for defective sectors....................................... 6-10
6.4 Read-ahead Cache........................................................................................ 6-12
6.4.1 DATA buffer structure....................................................................... 6-12
6.4.2 Caching operation.............................................................................. 6-13
6.4.3 Using the read segment buffer ........................................................... 6-15