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**82396SX Smart Cache 12/17/90
***Notes:...
***Info:...
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**82485 Turbo Cache (and 485Turbocache) c90...
**82489DX Advanced Programmable Interrupt Controller 10/12/92...
**82495DX/490DX DX CPU-Cache Chip Set <Sep91...
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**82496/491 Cache Controller / Cache RAM (for P5 Pentium) 03/22/93...
**82497/492 Cache Controller / Cache RAM (for P54 Pentium) <Nov94
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**82498/493 Cache Controller / Cache RAM (for P54 Pentium) <Nov94...
**
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**W83759/A/F/AF Advanced VL-IDE Disk Controller <96
***Notes:...
***Info:
GENERAL DESCRIPTION
The W83759A is an advanced version of Winbond's popular VL-IDE
interface chip, the W83759. The W83759A retains all of the features
and compatibility of the W83759 (the chip meets the ANSI ATA 4.0
specification for IDE hard disk operation and the VESA VL-Bus 2.0
specification for PC local bus devices) while incorporating new
features to meet Enhanced IDE, SFF-8011, ATA-2, and Fast-ATA
specifications.
Supports Disk Capacity of Greater than 528 MB
The W83759A's driver can handle remapping from BIOS CHS mode to HDD
LBA mode. This scheme enables users to break the 528 MB per drive
barrier, allowing full use of BIOS INT13 CHS information in drives
with a capacity of up to 8.4 GB.
High Speed Host Transfer Rate
The W83759A supports Enhanced IDE PIO mode 3 and Fast ATA PIO mode 3
and 4 timing; jumper settings or driver programming can be used to
select the PIO mode and a 33 or 50 MHz VL-Bus clock. Different
programming timing can be selected for different drives in the same
system. The burst transfer rate is shown in the following table.
ATA PIO IDE COMMAND CYCLE BURST TRANSFER RATE IORDY THROTTLE
MODE TIME (nS) (MB/sec) CONTROL
0 600 3.33 Option
1 383 5.22 Option
2 240 8.33 Option
3 180 11.1 Required
4 120 16.6 Required
Dual IDE Channels
Like the W83759, the W83759A supports a secondary IDE address
(170h-177h/376h) and IRQ15 for applications with four hard disk
drives. Additionally, the primary and secondary channels can be
independently enabled or disabled by jumper settings or software
programming.
Non-disk IDE Peripherals
Because the command cycle can be programmed individually for each
drive and dual IDE channels are supported, non-disk IDE peripherals
(such as an ATAPI CD-ROM or tape drive) can be attached to the
secondary IDE without affecting the transfer rate of the ATA disk
drive. Sales of ATAPI IDE CD-ROMs are expected to grow rapidly as
these devices become a standard part of many users' desktop PC setup.
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
Dual Channel IDE Yes Yes
8.4 G Max. Cap. Software Driving Software Driving
PIO Mode 3, 4 Control No Yes*
DMA Mode Control No Yes*
IOCHRDY Control No Yes*
IDE Timing Control Jumper Jumper or Driver*
Prefetch Control No Yes*
Power Saving Control No Yes*
ATAPI Protocol Software Driving Software Driving
>* All control is drive-by-drive (per drive selectability)
***Versions:...
***Features:
o Pin-to-pin backward compatible with W83759 VL-IDE Interface chip
o VESA VL-Bus Rev 2.0 compatible, connects directly to local bus and
four IDE drives
o Direct interface to various ANSI ATA/ATA-2/FAST ATA/IDE-2/Enhanced
IDE drives
o Supports 32 and 16-bit data transfer
o Fully software programmable for command active/recovery time and
address setup, data hold time
o Built-in VL-Bus to 16-bit IO data buffer for special applications
o Fully supports Enhanced IDE features, including Fast PIO, Mode 3/4,
IORDY flow control, prefetch control
o Supports dual channels to allow up to four drives or non-disk
devices (ATAPI CD-ROM and tape drives)
o Pipeline pre-fetched reads and posted writes for concurrent disk
and host operations
o Independent access timing for all drives (primary/secondary and
master/slave)
o All Enhanced IDE new features may be disabled/enabled via driver
or power-on setting by per drive selectability
o ATA/Mode 0-4 PIO speed may be set as default timing of each drive
via power-on jumper setting
o Supports slave DMA mode protocol (reserved)
o Supports auto power-down, standby, suspend APM power management
state for green PCs
o Primary and secondary channel can be independently enabled/disabled
by software or jumper setting
o Supports drivers for DOS, Windows, OS/2, UNIX, and Netware
o Packaged in 100-pin QFP
**W83769 Local Bus IDE Solution <94...
**
**UARTS:
**W86C250A UART (equivalent of INS8C250A) [no datasheet]
**W86C450/P Universal Asynchronous Receiver/Transmitter <Jul89...
**W86C451 I/O controller for IBM PC/AT/XT <Jul89...
**W86C452 I/O controller for IBM PC/AT Jul89...
**W86C456 I/O controller [no datasheet] ?
**W860551/P UART with FIFO and Printer Port Controller <94...
**
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