Disk Drive Operation
5-
6 WA31273A / WA32543A / WA33203A / WA32163A / WA31083A /
5-2-1-1
ATA Interface Block
The SID-9501D provides an ATA interface to the host computer and can attach to an ATA-1, ATA-2,
ATA-3 or ATA-4 host. It provides a means for the host to access the Task File registers used to
control the transfer of data between host memory and the disk.
The ATA Host Interface Block can be programmed to execute various host read/write commands
either completely automatically without any microprocessor intervention, semi-automatically with
minimal microprocessor intervention, or manually with the aid of the microprocessor.
Of particular interest to most designers, are the significant advances in ATA automation which have
been incorporated into the SID-9501D. The highlights of ATA automation are:
•
Automatic data transfer management for multi-sector Read/Write commands.
•
Automatic data transfer management for Read/Write Multiple.
•
ATA Multi-word DMA Mode 2 support (16.6MB/sec).
•
Fast IDE PIO Mode 4 support (16.6MB/sec).
•
Automatic Task File Management.
