Universal Serial Bus System Architecture, Second Edition, based on the 2.0 version of the Universal Serial Bus specification, provides in-depth coverage and a detailed discussion of USB. It focuses on the USB protocol, signaling environment, and electrical specifications, along with the hardware/software interaction required to configure and access USB devices. Key topics include: *Hot plug support (detection of low-, full-, and high-speed devices) *Electrical signaling at the 1.5, 12, and 480Mb/s rates *2.0 hub operation (including split transaction support) *2.0 high-speed protocol (including high-bandwidth and ping transactions) *High-speed transceiver test modes *Suspend/resume operations *Device descriptors *Device requests (commands) *USB transaction protocols (low-, full-, and high-speed) *Bus-powered devices *Self-powered devices *Error detection and handling *Device configuration *Device classes This second edition has been updated to reflect the changes in the USB specification from the original 1.0 to the current 2.0. The USB 2.0 specification defines high-speed transactions operating at 480Mb/s that increase throughput by a factor of 40 over the older USB devices. New h