.
Version 1.3 2005
NET2272
Features
Overview
o
8/16 bit local bus connects gluelessly
to most CPUs, DSPs, and DMA
controllers
o
Hi-Speed USB 2.0 Peripheral Port
o
Bursting DMA support facilitates
data transfers at 480 Mbps
o
High Bandwidth Isochronous Support
o
Low Power(186mW) requirements
ideal for USB Bus-Powered
Operation
o
Lowest standby power in its class
(8.1µW)
o
Variable I/O voltage (1.8V to 5V)
o
Lead Free Packaging
o
10x10mm 64-Pin TQFP Package
o
6x6mm, 64-Ball BGA Package
Hi-Speed USB 2.0 Interface
o
USB 2.0 Peripheral Interface
o
Hi-Speed USB with Sustained
Bandwidth of up to 40MBytes/sec (at
480 Mbps bursts)
o
Backwards compatible to Full Speed
USB connections
o
Utilize up to 30 Independent USB
Endpoints using Dynamic Virtual
Endpoint Technology
TM
o
Support for Bulk, Isochronous, and
Interrupt Endpoints
o
Integrated PHY
Local Bus to USB 2.0 Hi-Speed Peripheral Controller
Optimized for Power and Performance
PLX Technology’s NET2272 Local Bus to Hi-Speed USB 2.0 Peripheral Controller
is designed for low power and high performance applications.
The NET2272’s low power requirements (186mW active, 8.1µW standby) make it
ideal for bus-powered or battery-powered applications. USB bus-powered devices
are allowed to draw a maximum 500mA (according to the USB specification) of
operating current from the PC through the USB cable. The NET2272’s low power
makes this requirement easy to support. Furthermore, the NET2272’s variable I/O
voltage (1.8V to 5V) makes it easy to connect to other low power components.
The NET2272 features the highest sustained data transfer speeds on USB – up to
40Mbytes/sec. An optional Split Bus mode allows for simultaneous DMA and CPU
access to the NET2272. In this mode, the external DMA controller is connected to
upper 8-bits of the data bus, while the local CPU is connect to the lower 8-bits of the
data bus. While DMA transactions are taking place, the local CPU can
simultaneously access any endpoint buffer not involving the DMA.
The NET2272’s Dynamic Virtual Endpoint Technology™ actualizes the maximum
number of endpoints (30) allowed by the USB specification. This feature provides
the flexibility for applications to route different data through different endpoints to
improve quality of service and ease of design.
Add Hi-Speed USB 2.0 to Your Device
The NET2272 can be used to easily add a USB 2.0 peripheral port to any local bus
based embedded system. The local bus interface of the NET2272 can often connect
gluelessly because
its interface looks
like an 8 or 16-bit
SRAM. Most
CPUs and DSPs
already have these
memory interfaces
integrated.
The NET2272’s
asynchronous bus
makes it frequency
independent.
Accessing the
NET2272’s
registers is as
simple as accessing
memory.
Figure 1: NET2272 Block Diagram
Design Applications
Cell Phones and PDAs
As cell phones and PDAs include more memory for storing
rich media, faster USB transfer rates become more important.
The NET2272 is designed to easily add Hi-Speed USB 2.0
functionality to today’s communication devices.
With the USB Communications Device class driver, PCs can
easily use cell phones, connected through USB, to setup a high
speed wireless internet connection. PLX provides device
firmware supporting the USB Communications Device
standard. This means that PCs can recognize these devices
without additional host drivers.
The small packaging of the NET2272 (6x6mm) is well-suited
for adding Hi-Speed USB to these portable devices. The low
power consumption of the NET2272 facilitates the design of
bus-powered or battery-powered devices. Flexible I/O
voltages (1.8V to 5V) allow the NET2272 to connect
gluelessly to a diverse mix of CPUs and DSPs.
Figure 2: Adding a Hi-Speed USB port to cell phones
Development Tools
The NET2272 PCI-Based Reference Design Kit
The NET2272 PCI-RDK includes a PCI board that easily
plugs into any standard PCI slot (3.3V or 5V). This PCI board
allows a standard PC to emulate a USB device. With known
good hardware, firmware development can begin even before
the final device is ready. Schematics, layout, and BOM
information is shipped with the kit.
Both USB host and peripheral-side software is included with
the NET2272 PCI-RDK. The host-side software consists of
USB drivers and test applications. The peripheral-side
firmware is used to configure the NET2272 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 each kit.
Portable Media Players
The NET2272 is designed into many portable media players
on the market today. Most portable media players contain a
hard disk for media storage, a high-quality LCD display, video
input and output connections, and a Hi-Speed USB port for
data transfer. The NET2272’s small package, high
performance, and low power consumption makes it an ideal
solution for this battery-powered device.
The NET2272 supports Microsoft’s Media Transfer Protocol
(MTP), which allows playback of WMA and WMV files with
Digital Rights Management (DRM). PLX also provides
device firmware supporting the USB Mass Storage standard.
This means that PCs can recognize these devices without
additional host-side drivers.
Application notes showing sample connections between the
NET2272 and various CPUs are available online from the
PLX website. These application notes detail schematics,
timing diagrams, and register settings.
Product Ordering Information
Part Number
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
Web Site:
www.plxtech.com
Description
Local Bus to USB 2.0 Hi-Speed Peripheral Controller –
10x10mm 64-Pin TQFP Package
Local Bus to USB 2.0 Hi-Speed Peripheral Controller –
6x6mm 64-Ball BGA Package
NET2272 Reference Design Kit
NET2272REV1A-LF
NET2272REV1A-BC F
NET2272PCI-RDK
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.
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