USB3.0数据传输协议分析及实现

USB接口以其简单通用的特点成为消费类连接协议的首选.但随着多媒体技术的快速发展,USB 2.0已无法满足现在的高速应用需求.USB3.0以其5 Gb/s的传输速率和向后兼容等特点,成为下一代高速连接标准.根据USB3.0协议架构,文中分别从物理层、链路层、协议层和架构层对USB3.0的数据传输协议进行分析,并与USB2.0协议进行比较.最后介绍了基于EZ-USB FX3芯片的USB3.0加密U盘的实现方法.

Analysisand Realization of USB3.0 Data Transmission Protocol

For its simpleness and common-use, USB interface becomes the first choice of consume connect protocol. However,with the fast development of multimedia technique, the U SB2.0 couldn＇t now meet the requirement in high-speed application. With its 5Gbps transmission speed and backward compatibility,USB3.0 becomes the standard of next -generation high-speed connection. In accordance with the framework of USB＇s protocol,the USB3. O＇s data transmission protocol is analyzed from physical layer, link layer, protocol layer and frame layer, and also compared with the USB2.0 protocol. Finally,the realization of USB3.0 encrypted USB disk based on EZ-USB FX3is described.