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AU6391

USB2.0 to ATA/ATAPI Bridge Controller

Unspecified 

1.0 Introduction

1.1 Description

The AU6391 is a single chip controller designed for bridgingg USB 2.0 to ATA/ATAPI

bus interface. It is used as the primary controller of building an external USB 2.0

hard disk or CD/DVD drives.

To maximize the data throughput and achieve the best compatibility, AU6391 is

equipped with Alcor’s proprietary automatic speed negotiation (ASN) algorithm. The

ASN algorithm allows AU6391 to select optimized operating mode that device can

best support a reliable data transfer from PIO mode 0~4 and Ultra DMA mode 2/4.

The silicon would work with the default device driver from Windows ME, Windows

2000, Windows XP and Mac OS X, however, vendor device driver provided by Alcor

Micro would enable the built device working under Windows 98, Windows 2000

(SP1/SP2) and Mac OS 9.

1.2 Features

Supports USB 2.0 specification and USB Device Class Definition for Mass

Storage, Bulk-Transport V1.0

Supports ATA/ATAPI-6 specification Revision 1.0

PIO mode 0~4

UDMA mode 2/4

Supports ATA/ATAPI device configured in master or slave mode

Supports 48-bit addressing for large capacity hard drive

Hardware DMA engine integrated inside for performance enhancement

Works with default device driver from Windows ME/2000/XP and Mac OS X.

One spared LED pin for disk access indication

Built-in voltage regulator

48-pin LQFP package

AU6391 USB2.0 to ATA/ATAPI Bridge Controller V1.00W

Official Release _ Public

Page 6 of 22

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