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C141-E112-01EN
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CHAPTER 5 INTERFACE ........................................................................................................ 5 - 1
5.1 Physical Interface ................................................................................................................. 5 - 2
5.1.1 Interface signals.................................................................................................................... 5 - 2
5.1.2 Signal assignment on the connector ..................................................................................... 5 - 3
5.2 Logical Interface................................................................................................................... 5 - 6
5.2.1 I/O registers.......................................................................................................................... 5 - 6
5.2.2 Command block registers..................................................................................................... 5 - 8
5.2.3 Control block registers ......................................................................................................... 5 - 13
5.3 Host Commands ................................................................................................................... 5 - 13
5.3.1 Command code and parameters............................................................................................ 5 - 14
5.3.2 Command descriptions ......................................................................................................... 5 - 16
5.3.3 Error posting......................................................................................................................... 5 - 70
5.4 Command Protocol............................................................................................................... 5 - 71
5.4.1 Data transferring commands from device to host................................................................. 5 - 71
5.4.2 Data transferring commands from host to device................................................................. 5 - 73
5.4.3 Commands without data transfer..........................................................................................5 - 75
5.4.4 Other commands................................................................................................................... 5 - 76
5.4.5 DMA data transfer commands.............................................................................................. 5 - 76
5.5 Ultra DMA feature set.......................................................................................................... 5 - 78
5.5.1 Overview .............................................................................................................................. 5 - 78
5.5.2 Phases of operation............................................................................................................... 5 - 79
5.5.3 Ultra DMA data in commands.............................................................................................. 5 - 79
5.5.3.1 Initiating an Ultra DMA data in burst .................................................................................. 5 - 79
5.5.3.2 The data in transfer............................................................................................................... 5 - 80
5.5.3.3 Pausing an Ultra DMA data in burst .................................................................................... 5 - 80
5.5.3.4 Terminating an Ultra DMA data in burst ............................................................................. 5 - 81
5.5.4 Ultra DMA data out commands............................................................................................ 5 - 83
5.5.4.1 Initiating an Ultra DMA data out burst ................................................................................ 5 - 83
5.5.4.2 The data out transfer............................................................................................................. 5 - 84
5.5.4.3 Pausing an Ultra DMA data out burst .................................................................................. 5 - 84
5.5.4.4 Terminating an Ultra DMA data out burst ........................................................................... 5 - 85
5.5.5 Ultra DMA CRC rules.......................................................................................................... 5 - 87
5.5.6 Series termination required for Ultra DMA.......................................................................... 5 - 88
5.6 Timing .................................................................................................................................. 5 - 89
5.6.1 PIO data transfer................................................................................................................... 5 - 89
5.6.2 Multiword data transfer........................................................................................................ 5 - 90