本书系统地介绍了新型USB总线接口的协议、工作原理以及驱动程序设计，并以大量篇幅全面、详细地介绍了各种应用场合下的USB设计实例。(This book systematically introduces the protocol, working principle and driver design of the new type of USB bus interface, and gives a comprehensive and detailed introduction of USB design examples in various applications.)