Universal Serial Bus Specification Compaq Hewlett-Packard Intel Lucent Microsoft NEC Philips Revision 2.0 April 27, 2000 Universal Serial Bus Specification Revision 2.0 Scope of this Revision The 2.0 revision of the specification is intended for product design. Every attempt has been made to ensure a consistent and implementable specification. Implementations should ensure compliance with this revision. Revision History Revision Issue Date Comments 0.7 November 11, 1994 December 30, 1994 Supersedes 0.6e. 0.8 Revisions to Chapters 3-8, 10, and 11. Added appendixes. 0.9 April 13, 1995 Revisions to all the chapters. Revisions to all the chapters. Revisions to Chapters 1, 2, 5-11. 0.99 1.0 FDR 1.0 August 25, 1995 November 13, 1995 January 15, 1996 Edits to Chapters 5, 6, 7, 8, 9, 10, and 11 for consistency. 1.1 September 23, 1998 Updates to all chapters to fix problems identified. 2.0 (draft 0.79) October 5, 1999 Revisions to chapters 5, 7, 8, 9, 11 to add high speed. 2.0 (draft 0.9) 2.0 December 21, 1999 April 27, 2000 Revisions to all chapters to add high speed. Revisions for high-speed mode. Universal Serial Bus Specification Copyright ? 2000, Compaq Computer Corporation, Hewlett-Packard Company, Intel Corporation, Lucent Technologies Inc, Microsoft Corporation, NEC Corporation, Koninklijke Philips Electronics N.V. All rights reserved. INTELLECTUAL PROPERTY DISCLAIMER THIS SPECIFICATION IS PROVIDED TO YOU “AS IS” WITH NO WARRANTIES WHATSOEVER, INCLUDING ANY WARRANTY OF MERCHANTABILITY, NON-INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE. THE AUTHORS OF THIS