82C862 Datasheet, PDF (17/51 Pages) List of Unclassifed Manufacturers – FireLink USB Dual Controller Quad Port USB

FireLink USB
®
82C862
4.0 Functional Description
4.1 Universal Serial Bus (USB)
The 82C862 controller supports a PCI-based implementation of Universal Serial Bus utilizing the OpenHCI core developed by
Compaq. The logic core consists of two USB host controller modules (making the 82C862 part a multi-function PCI device),
and a PCI interface controller.
Each USB host controller module contains an integrated root hub that supports two downstream USB hubs or devices.
Keyboard and mouse legacy support are also included for DOS compatibility with USB devices. This legacy support operates
in conjunction with the primary host controller module as described later in this document.
This document must be used along with the following public domain reference documents to get the complete functional
description of the USB core implementation.
• USB Specification, Revision 1.1
• OpenHCI Specification, Revision 1.0a
• PCI Specification, Version 2.1
A functional block diagram of one of the two USB controller modules is given in Figure 4-1. The other is identical.
Figure 4-1 USB Functional Block Diagram
CLKRUN#
PCI Bus
PCI Master
Core
Clock
Control
Logic
Bus Master
Data Buffer
Engine
PCI Interface
PCI Slave
PCI I/O
PCI Config
KBD Legacy
I2C
Interface
I2CCLK
I2CDATA
Serial
ROM
SODIMM
List Processor
Clock
Gen
USB SIE
Frame
Management
Global
Operation
s
Root Hub
Control
Port
1
PWRGD1
PWRFLT1
PWRON1
VD1+
VD1-
USB
1
Port
2
PWRGD2
PWRFLT2
PWRON2
VD2+
VD2-
USB
2
912-2000-030
Revision: 1.0
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