关于usb接口定义，以及基本封装，对于数字通讯方面是一个比较好的资料-Usb interface definitions, as well as the basic package for digital communications is a relatively good information

USB隐私大公开，USB概念、基础知识以及未来发展状况-USB Privacy open to the public, USB concepts, basic knowledge, and future developments

USB协议中文版为自身学习过程中总结的一些基本的通信规范和协议，和大家共享。-Chinese version of the USB protocol for their own learning process, a summary of some basic communication standards and protocols, and share.