使用COM接口给手机发短信，使用前需要用线把手机接入USB或COM接口...

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.

usb1.1协议的实现，usb设备端的开发-USB1.1 protocol implemented, USB Device Development

EZUSB 驱动，自己编写的，需要的可以-EZUSB drive, I have written, take a look at the necessary

vb下usb通讯的例子-The example of communication of usb in vb

usb 设计参考资料 可以借鉴 usb1.1-usb reference design can draw on USB1.1

USB1.1中文协议-USB Protocol V1.1 for Chinese

一些USB驱动的英文资料，我没看懂，哈哈，希望提供给有用之人-Some USB-driven information in English, I did not understand, want to provide a useful person to the

This driver implements a COM port interface for USB Point-of-Sale devices

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

this the way how to monitor usb communication with specific tools-this is the way how to monitor usb communication with specific tools