Datasheet > W83759A

W83759A

更新时间： 2024-01-07 05:06:21

品牌	Logo	应用领域
华邦 - WINBOND		控制器
页数	文件大小	规格书
41页	331K
描述
ADVANCED VL-IDE DISK CONTROLLER

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数据手册

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W83759A 数据手册

W83759A

ADVANCED VL-IDE DISK CONTROLLER

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

MODE

IDE COMMAND CYCLE

TIME (nS)

BURST TRANSFER

RATE (MB/sec)

IORDY THROTTLE

CONTROL

600

383

240

180

120

3.33

5.22

8.33

11.1

16.6

Option

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.

Publication Release Date: May 1995

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Revision A1

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