通用串行总线 USB 是 PC 体系中的一套全新的工业标准 它支持单个主机与多个外设同时进行数据交换.论文首先会介绍 USB 的体系结构和特点 包括总线特征 协议定义传输方式和电源管理等等 这部分内容会使 USB 开发者和用户对USB有一个整体的认识.-Universal Serial Bus USB is the PC system set new industry standards it supports a single host and multiple peripherals to exchange data simultaneously. Paper will first introduce the architecture and features USB bus features, including the definition of transmission protocol and power management, etc. This section will make USB USB developers and users have a sense of the whole.