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OCUMENT

ELEASE

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included herein. Please contact VIA Technologies for the latest documentation.

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1995, 1996 Via Technologies Incorporated. Printed in Taiwan. A

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and Plug and Play

are registered trademarks of Microsoft Corp.

PCI

is a registered trademark of the PCI Special Interest Group.

All trademarks are the properties of their respective owners.

Disclaimer Notice:

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Offices:

5020 Brandin Court

8th Floor, No. 533

Fremont, CA

94538

Chung-Cheng Rd., Hsin-Tien

USA

Taipei, Taiwan ROC

Tel:

(510) 683-3300

Tel:

(886-2) 218-5452

Fax:

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Fax:

(886-2) 218-5453

VIA Technologies, Inc.

VT83C572

-1-

VIA VT83C572

PCI

USB C

ONTROLLER

EATURES

* Universal Serial Bus Interface

USB specification v.1.0 compatible

Intel UHCI (Universal Host Controller Interface) v.1.1 register compatible

Legacy keyboard and PS2 mouse support

Root hub and two down stream function ports

Integrated physical layer transceivers

Normal and low power operating mode

Operable in both USB-aware (Windows-95 and NT) and USB legacy BIOS support

Inter-operable with major USB peripherals

* PCI Interface

PCI specification v.2.1 compliant

Supports advanced PCI commands

Multi-level data FIFOs with full scatter and gather capabilities

* 0.5um high speed low power CMOS process

* Single chip 100-pin PQFP device

VT83C572 C

ONFIGURATION

EGISTERS

The VT83C572 PCI to USB controller is fully compatible with the UHCI specification v.1.1. There

are two sets of software accessible registers -- PCI configuration registers and USB I/O registers. The
USB I/O registers are defined in the UHCI v.1.1 specification.

PCI Configuration Registers

Offset

Function

1-0

Vendor ID : 1106h

(read only)

3-2

Device ID : 3038h

(read only)

5-4

Command Register

bit 15-8: reserved
bit 7:

Address stepping, default: enabled

bit 6-5: reserved

VIA Technologies, Inc.

VT83C572

-2-

bit 4:

Memory write and invalidate, default: disabled

bit 3:

Fixed at 0 (special cycles)

bit 2:

Bus master, default: disabled

bit 1:

Memory space, default: disabled

bit 0:

I/O space, default: disabled

7-6

Status Register

bit 15:

reserved

bit 14:

Signaled system error

bit 13:

Received master abort

bit 12:

Received target abort

bit 11:

Signaled target abort

bit 10-9: DEVSEL# timing: fixed at 01 (medium)
bit 8-0: reserved

Revision ID.

B-9

Class Code Register:

Fixed at 0C0300h to indicate the USB Controller

Cache Line Size

Default: 00h

Latency Timer

Default: 16h

Header Type = 00h

(read only)

BIST

Fixed at 00

23-20

Base address for

UHCI v1.1 compliant USB IO Registers

bit 31-16:reserved
bit 15-5: Port address for the base USB IO Registers, corresponding to AD[15:5]
bit 4-0: 00001b

Interrupt Line

Interrupt Pin, Default = 01h

3E-3F

reserved

Misc. Control Register 1
bit 7:

PCI Memory Command Option
0 - Support Memory Read Line, Memory Read Multiple, Memory Write and Invalidate
1 - Only support Memory Read, Memory Write Commands

bit 6:

Babble Option
0 - Automatically disable babbled port when EOF babble occurs.
1 - Don't disable babbled port.

bit 5:

PCI Parity Check Option
0 - Disable PERR generation
1 - Enable parity check and PERR generation

bit 4:

reserved

bit 3:

USB Data Length Option
0 - Support TD length up to 1280.
1 - Support TD length up to 1023.

bit 2:

USB Power Management

VIA Technologies, Inc.

VT83C572

-3-

0 - Disable USB power management
1 - Enable USB power management

bit 1:

DMA Option
0 - 16DW burst access
1 - 8DW burst access

bit 0:

PCI Wait State
0 - Zero wait
1 - One wait

Misc. Control Register 2
bit7-3:

reserved

bit 2:

Trap Option
0 - Set trap 60/64 status bits without checking enable bits.
1 - Set trap 60/64 status bits only when trap 60/64 enable bits are set.

bit 1:

A20gate Pass Through Option
0 - Pass through A20GATE command sequence defined in UHCI.
1 - Don't pass through Write I/O port 64

bit 0:

reserved

42-5F

reserved

Serial Bus Release Number

fixed at 10h

C0-C1

Legacy Support Register (compliant with

UHCI v1.1 specification)

Default=2000h

USB I/O Registers (UHCI v1.1 Compliant)

Offset

Function

1-0

USB Command

3-2

USB Status

5-4

USB Interrupt Enable

7-6

Frame Number

B-8

Frame List Base Address

Start Of Frame Modify

11-10

Port 1 Status/Control

13-12

Port 2 Status/Control

Электронный компонент: VT83C572