82C862 Datasheet, PDF (5/51 Pages) List of Unclassifed Manufacturers – FireLink USB Dual Controller Quad Port USB

®
1.0 Features
• Compliant with USB rev. 1.1 specification
• Fully compatible with USB OHCI specification
• Two independent host controllers, two ports each,
making FireLink USB a multi-function PCI device
• Second host controller can be disabled if not used
• Clock input can be derived from either a 12MHz crystal
or a 48MHz oscillator
• Clocks can be turned off when not in use to save power
• Core operates at 3.3V; PCI inputs are 5V-tolerant
• Incorporates PCI Power Management, supporting very
low power standby modes
Figure 1. 82C862 FireLink USB Block Diagram
FireLink USB
82C862
• Implements CLKRUN# pin to support hardware-
enforced power-down
• Packaged as 100-pin LQFP (Low-profile Quad Flat
Pack)
• Supported by Windows 98, Windows 2000, and
Windows CE
2.0 Overview
This document describes the OPTi FireLink USB (82C862)
controller.
This PCI-to-USB bridge is unique in that it consists of two
independent dual-port controllers, each sharing only the
common PCI bus connection. This arrangement allows for
a total Universal Serial Bus bandwidth of 24Mb/s, divided
into 12Mb/s for each pair of ports.
Figure 1 provides a block diagram of the overall
functionality of the chip.
FireLink USB
82C862
PCI
interface
R E Q #, GNT#
C e n tr a l
Arbiter
48MHz Clock
G e n e r a tio n
USB
Controller
M odule 1
U S B C o n fig
Regs Function 0
port 1
port 2
USB
Controller
M odule 2
U S B C o n fig
Regs Function 1
port 3
port 4
12MHz
xtal
912-2000-030
Revision: 1.0
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