W83759A
FEATURES
· Pin-to-pin backward compatible with W83759 VL-IDE Interface chip
· VESA VL-Bus Rev 2.0 compatible, connects directly to local bus and four IDE drives
· Direct interface to various ANSI ATA/ATA-2/FAST ATA/IDE-2/Enhanced IDE drives
· Supports 32 and 16-bit data transfer
· Fully software programmable for command active/recovery time and address setup, data hold
time
· Built-in VL-Bus to 16-bit IO data buffer for special applications
· Fully supports Enhanced IDE features, including Fast PIO, Mode 3/4, IORDY flow control,
prefetch control
· Supports dual channels to allow up to four drives or non-disk devices (ATAPI CD-ROM and tape
drives)
· Pipeline pre-fetched reads and posted writes for concurrent disk and host operations
· Independent access timing for all drives (primary/secondary and master/slave)
· All Enhanced IDE new features may be disabled/enabled via driver or power-on setting by per
drive selectability
· ATA/Mode 0-4 PIO speed may be set as default timing of each drive via power-on jumper setting
· Supports slave DMA mode protocol (reserved)
· Supports auto power-down, standby, suspend APM power management state for green PCs
· Primary and secondary channel can be independently enabled/disabled by software or jumper
setting
· Supports drivers for DOS, Windows, OS/2, UNIX, and Netware
· Packaged in 100-pin QFP
Publication Release Date: May 1995
- 3 -
Revision A1
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