转载的，希望加入你们，谢谢关照

对USB的2.0标准和上位机下位机通讯标准，各部分的结构组成和实现情况进行整理。当时做项目涉及到这部分的知识，所以看了大量的资料，这部分的东西蛮多-For USB 2.0 standards and lower PC communication standards, the various parts of the structure of the composition and finishing realize the situation. At that time, to do projects related to this part of the knowledge, so read a lot of information, this part of the East and West蛮多

开发USB实验系统比较纤细的资料。用的是372，USB从方式。支持IAP功能。-USB experimental system developed relatively slim information. Using a 372, USB from the way. IAP support functions.

进行USB通讯的源码 所用芯片为EZ-USB2131Q-USB communication source for the chips used in the EZ-USB2131Q

USB通信协议和U盘固件程序实现与调试-U disk USB communication protocols and procedures for implementation and debugging firmware

FPGA的USB应用电路，已经成功通过测试，可以量产。-Application of FPGA circuit of the USB has been successfully tested, can be mass production.

凌阳61 串口和usb isp在线调试程序-Sunplus 61 serial and usb isp-line debugger

High volume USB 2.0 devices will be designed using ASIC technology with embedded USB 2.0 support. For full-speed USB devices the operating frequency was low enough to allow data recovery to be handled in a vendors VHDL code, with the ASIC vendor providing only a simple level translator to meet the USB signaling requirements. Today s gate arrays operate comfortably between 30 and 60 MHz. With USB 2.0 signaling running at hundreds of MHz, the existing design methodology must change.

USB终端的设置代码-USB terminal configuration code

USB接口驱动程序-USB Driver

一个用keil编写的usb测速软件，通过启动新线程来接受处理数据-Keil prepared using a usb velocimetry software, through the launch of a new thread to accept data processing