W83759A
Enhanced IDE/Fast ATA Dual Channel Structure
Secondary Channel
40-pins
Primary Channel
40-pins
Tape
CD ROM
Disk
Disk
ATAPI
SD0
ATAPI
SD1
< 8.4 GB
< 8.4 GB
PD0
PD1
The W83759A provides all of the next-generation ATA-IDE requirements, including support for high
capacity disk drives, high speed host transfers, multiple IDE peripherals, and non-disk IDE
peripherals. It makes high-performance, low-cost, easy-to-use IDE machines possible.
The W83759A is pin-to-pin backward compatible with the W83759. In addition to the advanced
features described above, the W83759A supports automatic power-down, standby, and suspend APM
power management states for green PC applications. This new chip is packaged in a 100-pin QFP.
The table below compares the W83759 and W83759A:
W83759
W83759A
Yes
Dual Channel IDE
8.4 G Max. Cap.
Yes
Software Driving
Software Driving
Yes*
PIO Mode 3, 4 Control
DMA Mode Control
IOCHRDY Control
IDE Timing Control
Prefetch Control
No
No
Yes*
No
Jumper
No
Yes*
Jumper or Driver*
Yes*
Power Saving Control
ATAPI Protocol
No
Yes*
Software Driving
Software Driving
* All control is drive-by-drive (per drive selectability)
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