USB 2.0 Specification

Universal Serial Bus Revision 2.0 specification provides the technical details to understand USB requirements and design USB compatible products. Modifications to the USB specification are made through Engineering Change Notices (ECNs). Enclosed in this zip file are the following documents:

1. The Original USB 2.0 specification released on April 27, 2000

2. Errata to the USB 2.0 specification as of December 7, 2000

3. Mini-B connector Engineering Change Notice to the USB 2.0 specification.

4. Pull-up/pull-down Resistors Engineering Change Notice to the USB 2.0 specification.

5. Errata to the USB 2.0 specification as of May 28, 2002

6. Interface Association Descriptor Engineering Change Notice to the USB 2.0 specification.

7. Rounded Chamfer Engineering Change Notice to the USB 2.0 specification as of October 8, 2003

8. Unicode Engineering Change Notice to the USB 2.0 specification as of February 21, 2005

9. Inter-Chip USB Supplement Revision 1.0 as of March 13, 2006

10. USB On-The-Go Supplement Revision 1.3 as of December 5, 2006

11. Micro-USB Cables and Connectors Specification Revision 1.01 as of April 4, 2007

12. USB 2.0 Link Power Management Addendum Engineering Change Notice to the USB 2.0 specification as of July 16, 2007.

13. High-Speed Inter-Chip USB Electrical Specification Revision 1.0 as of September 23, 2007

14. Suspend Current Limit Changes ECN as of April 9, 2008

Please check this site for any future updates to the USB 2.0 specification.

LEGAL DISCLAIMER

THIS SPECIFICATION IS PROVIDED "AS IS" AND WITHOUT ANY WARRANTY OF ANY KIND, EXPRESSED OR IMPLIED. WITHOUT LIMITATION, THERE IS NO WARRANTY OF NON-INFRINGEMENT, NO WARRANTY OF MERCHANTABILITY, AND NO WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE. ALL WARRANTIES ARE EXPRESSLY DISCLAIMED.

USER ASSUMES THE FULL RISK OF USING THIS SPECIFICATION. IN NO EVENT SHALL USB-IF BE LIABLE FOR ANY ACTUAL, DIRECT, INDIRECT, PUNITIVE, OR CONSEQUENTIAL DAMAGES ARISING FROM SUCH USE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

USB 2.0 Adopters Agreement

The USB 2.0 Adopters Agreement allows a signing company to participate in a reciprocal, royalty-free licensing arrangement for compliant products. Any USB 2.0 Adopters Agreement shall only be effective if received within one (1) year after first sale of products that include 'Compliant Products'. See the USB 2.0 Adopters Agreement for details.

USB 2.0 On-The-Go Specification Supplement Adopters Agreement

The USB 2.0 Promoters have voted to adopt an addendum to the USB 2.0 Specification designated �On-The-Go Supplement to the USB 2.0 Specification� (the �Specification Supplement�). A copy of the Specification Supplement is located at: www.usb.org/developers/onthego). This letter is to provide USB 2.0 Adopters the option of extending their Adopter Agreement to address this new Spec Supplement (the Spec Supplement exceeds the scope of your original USB 2.0 Adopters Agreement, which is specific to the USB 2.0 Specification).

Adopters are under no obligation to amend their Adopters Agreement. However, those Parties that are Adopters as of the date of this Amendment Letter wishing to amend their Adopters Agreement must have the Amendment Letter (.pdf file format, size 16k) executed by a duly authorized representative and return the original signed letter to the address below to expand the scope of their Adopters Agreement. Once you have signed the Amendment Letter, return the original to the USB 2.0 Promoter Group at:

USB 2.0 Promoter Group

USA

Low Voltage Inter-Chip Adopters Agreement Amendment

The USB 2.0 Promoters have voted to adopt an addendum to the USB 2.0 Specification designated "Low Voltage Inter-Chip Supplement to the USB 2.0 Specification" ("Spec Supplement", posted with the USB 2.0 spec above) and to provide USB 2.0 Adopters the option of extending their Adopter Agreement to address this new Spec Supplement (the Spec Supplement exceeds the scope of your original USB 2.0 Adopters Agreement, which is specific to the USB 2.0 Specification).

Adopters are under no obligation to amend their Adopters Agreement. However, those Parties that are Adopters as of the date of this Amendment Letter wishing to amend their Adopters Agreement must have the Amendment Letter (.pdf file format, size 12k) executed by a duly authorized representative and return the original signed letter to the address below by no later than March 20, 2007 to expand the scope of their Adopters Agreement. Parties becoming Adopters after the date of this Amendment Letter may amend their Adopters Agreement by signing and returning this Amendment Letter to the address below within their Adoption Period. Responses from existing USB 2.0 Adopters post marked after the applicable deadline are considered null and void. Once you have signed the Amendment Letter, return the original to the USB 2.0 Promoter Group at:

USB 2.0 Promoter Group

USA