VIA Technologies, Inc.

VT83C572

-1-

VIA VT83C572

* 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

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