The Original USB 2.0 specification released on April 27, 2000 Errata to the USB 2.0 specification as of December 7, 2000 Mini-B connector Engineering Change Notice to the USB 2.0 specification. Pull-up/pull-down Resistors Engineering Change Notice to the USB 2.0 specification. Errata to the USB 2.0 specification as of May 28, 2002 Interface Association Descriptor Engineering Change Notice to the USB 2.0 specification. Rounded Chamfer Engineering Change Notice to the USB 2.0 specification as of October 8, 2003 Unicode Engineering Change Notice to the USB 2.0 specification as of February 21, 2005 Inter-Chip USB Supplement Revision 1.0 as of March 13, 2006 Micro-USB Cables and Connectors Specification Revision 1.01 as of April 4, 2007 USB 2.0 Link Power Management Addendum Engineering Change Notice to the USB 2.0 specification as of July 16, 2007. High-Speed Inter-Chip USB Electrical Specification Revision 1.0 as of September 23, 2007 Suspend Current Limit Changes Engineering Change Notice to the USB 2.0 Specification as of April 9, 20085V Short Circuit Withstand Requirement Change Engineering Change Notice to the USB 2.0 Specification as of December 22, 2008Device Capacitance Engineering Change Notice to the USB 2.0 Specification as of December 22, 2008Material Change Engineering Change Notice to the USB 2.0 Specification as of December 22, 2008USB 2.0 Phase-locked SOFs Engineering Change Notice to the USB 2.0 Specification as of December 22, 2008MicroUSB Micro-B ID Pin Resistance and Tolerance stack-up between D+ and D- Engineering Change Notice to the MicroUSB Specification to the USB 2.0 Specification, Revision 1.01 as of December 22, 2008USB 2.0 Connect Timing as of April 24, 2009 On-The-Go and Embedded Host Supplement to the USB 2.0 Specification as of May 8, 2009 "On-The-Go Supplement to the USB 2.0 Specification" Adopters Agreement Quad Type Cable Additional for Micro USB ECN as of December 29, 2009 USB_for_Portable_Devices_FINAL.pdf （PTT）……