Instant Prototype With the AT43301 Low-Cost Hub Controller Chip
Reduce Design Cycle
Reduce System Debugging
Simplify Component Selection
Avoid Typical Design Problems
The AT43DK301 comes with everything designers need to develop a low-cost, selfand bus-powered USB Hub. To eliminate typical prototyping hassles, a fully populated stand-alone hub is included. Designers can take the stand-alone hub from the
box to the system to see the operation of the AT43301 hub controller chip. The application note explains the component selection and resolves typical problems for the
Rev. 1186A–10/98
Stand-alone Hub
The hub may immediately be plugged into any USB system. The only requirements are that the system has an
operational USB port and that the system has the USB
drivers enabled on the operating system.
When connecting the hub, connect the power supply to the
hub. The bus powered portion of the controller will configure without the power supply, but if devices are to be
attached to the downstream ports, the power supply is
required. Next, connect the upstream port to the USB connector on the computer. Windows will flash a “New Hardware Found” box indicating the “Atmel USB Hub” was
detected and automatically load the generic USB hub drivers. Downstream devices can then be used on the configured hub.
Tip: For your system, make sure USB is enabled in the
BIOS. This may typically be done during the boot-up
process by going into the CMOS setup and checking
the Plug-N-Play settings.
To determine if USB is properly enabled, go into the
“Control Panel” and click on the “System” icon. Under
the Device Manager USB will be listed if setup properly.
The application note covers the latest information detailing
how to design a USB hub with the AT43301 chip. Explanations of component selection, USB hub requirements, and
design insights will assist designers in smoothly integrating
a USB hub onto existing or new designs.
By understanding the reference design, layout and component selection may be optimized for specific design constraints.
• Application Note
• Reference Design Schematics
• Bill of Materials
• AT43301 Data Sheet
• Self- and Bus-Powered USB Hub
• USB Cable
• Power Supply
Atmel Headquarters
Atmel Operations
Corporate Headquarters
Atmel Colorado Springs
2325 Orchard Parkway
San Jose, CA 95131
TEL (408) 441-0311
FAX (408) 487-2600
1150 E. Cheyenne Mtn. Blvd.
Colorado Springs, CO 80906
TEL (719) 576-3300
FAX (719) 540-1759
Atmel Rousset
Atmel U.K., Ltd.
Coliseum Business Centre
Riverside Way
Camberley, Surrey GU15 3YL
TEL (44) 1276-686677
FAX (44) 1276-686697
Zone Industrielle
13106 Rousset Cedex, France
TEL (33) 4 42 53 60 00
FAX (33) 4 42 53 60 01
Atmel Asia, Ltd.
Room 1219
Chinachem Golden Plaza
77 Mody Road
Tsimshatsui East
Kowloon, Hong Kong
TEL (852) 27219778
FAX (852) 27221369
Atmel Japan K.K.
Tonetsu Shinkawa Bldg., 9F
1-24-8 Shinkawa
Chuo-ku, Tokyo 104-0033
TEL (81) 3-3523-3551
FAX (81) 3-3523-7581
North America:
1-(800) 292-8635
1-(408) 441-0732
[email protected]
Web Site
1-(408) 436-4309
© Atmel Corporation 1998.
Atmel Cor poration makes no warranty for the use of its products, other than those expressly contained in the Company’s standard warranty which is detailed in Atmel’s Terms and Conditions located on the Company’s website. The Company assumes no responsibility for
any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without
notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual proper ty of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel’s products are
not authorized for use as critical components in life suppor t devices or systems.
Marks bearing
are registered trademarks and trademarks of Atmel Corporation.
Terms and product names in this document may be trademarks of others.
Printed on recycled paper.