USB接口定义及封装

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

包含所有的常用USB接口的机械结构，包含A、B和MINI类型的DIP和SMD封装结构！-Contains all of the common USB interface, the mechanical structure, including A, B and MINI DIP and SMD type package structure!