Design Applications

Add a USB Device Port to PCI-Based Systems

The NET2282 can be used to easily add a USB 2.0 peripheral

port to a PCI based embedded system. The standard PCI

interface of the NET2282 connects gluelessly to any PCI bus.

Standard PCI registers allow the existing BIOS to configure

and send data to and from the NET2282.

Firmware is available to configure the NET2282 to resemble a

standard USB class device (like a printer or mass storage

device) for which no USB host drivers will need to be written.

For custom applications, firmware APIs are provided to

abstract the USB transactions to reads and writes. This

firmware is available for various operating systems.

Migrate PCI and CardBus Designs to USB

The NET2282 is designed to easily convert existing PCI cards

or CardBus adapters to stand alone USB devices. Since both

PCI and CardBus chips are based around the standard PCI

protocol, the NET2282 connects gluelessly with them.

Instead of a PCI host chipset and BIOS on a PC configuring

the PCI/CardBus silicon, the NET2282 can itself act as the

PCI host, with configuration information coming from its

internal 8051 CPU or from the USB host. Auto-Enumeration

Technology allows a standard USB host to detect this new

USB device even if no firmware has been run. This means

that firmware can actually be downloaded to the USB device

after initial boot-up.

The NET2282 includes PCI clock, reset, interrupt, and

arbitration pins to compensate for the other components

usually found in a typical PCI host environment. Shared

memory in the NET2282 functions as main memory for

holding descriptors or other control data. The integrated 8051

CPU can also be used to configure the device to resemble a

standard USB class device (like a communications or video

device) even if there is no local intelligence on the peripheral.

Figure 2: Converting a PCI TV Tuner Board to USB

The NET2282 Rapid Development Kit

The NET2282RDK includes a PCI board that easily plugs into

any standard PCI slot (3.3V or 5V). This board also includes

an optional PCI slot for plugging other PCI boards into the

RDK board itself. That would be for those applications where

the NET2282 will be the PCI host.

Both USB host and peripheral-side software is included with

the NET2282RDK. The host-side software consists of USB

drivers and test applications. The peripheral-side firmware is

used to configure the NET2282 to resemble a standard USB

class device (like a printer or mass storage device) for which

no USB host drivers will need to be written. For custom

applications, firmware APIs are provided to abstract the USB

transactions to reads and writes. While this software is

available for various operating systems, it is written in

standard C with portability in mind. A porting guide is

shipped with the kit.

PLX Technology, Inc.

870 Maude Ave.

Sunnyvale, CA 94085 USA

Tel: 1-800-759-3735

Tel: 1-408-774-9060

Fax: 1-408-774-2169

Product Ordering Information

Part Number

Description

NET2282-AB33PC F

PCI to USB 2.0 Hi-Speed Peripheral Controller

NET2282-RDK

NET2282 Rapid Development Kit

Please contact your local PLX sales representative for ordering information.

© 2005 PLX Technology, Inc. All rights reserved. PLX and the PLX logo are registered trademarks of PLX Technology, Inc. All other product names that appear in this material are for

identification purposes only and are acknowledged to be trademarks or registered trademarks of their respective companies. Information supplied by PLX is believed to be accurate and reliable,

but PLX Technology, Inc. assumes no responsibility for any errors that may appear in this material. PLX Technology, Inc. reserves the right, without notice, to make changes in product design or

specification.

NET2282-SIL-PB-P1-1.4

12/05