Universal Serial Bus System Architecture provides an in-depth discussion of USB and is based on the 1.0 version of the Universal Serial Bus specification. It focuses on the USB protocol, signaling environment, and electrical specifications, along with the hardware/software interaction required to configure and access USB devices. Although this book does not focus on writing USB device drivers, it does contain useful background information that aids in understanding the USB software environment. Key topics include: differential signaling environment, device configuration, suspend/resume operations device descriptors, device requests (commands), transfer mechanisms USB transaction protocols, bus-powered devices, self-powered devices host controller designs (UHC and OHC), error detection and handling device class definitions.