usb口通讯 很实用的哦，速度快，稳定性强

USB1.1枚举过程开发的资料式-USB1.1 enumeration process development of information-

usb协议的正式规范，必备-usb agreement formalized Obligatory

usb2.0技术入门-USB 2.0 technology portal

USB开发芯片FT245R资料,动态连接库和说明及此芯片的驱动。-FT245r information

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.

samsung 44b0X通过pusbd12的usb通讯程序-pusbd12 through the USB Communication Program

很实用的通用usb驱动程序的应用程序开发指南-Very practical generic usb driver Application Development Guide

TUSB3210固件开发源程序（C语言、开发环境keil)-TUSB3210 source firmware development (C language development environment keil)

isp1160_isa_evel_codeUSB主机软件，可驱动打印机，音频设备，鼠标? size=80>

PIC单片机的USB嵌入式接口程序,用C语言编写-PIC MCU embedded USB interface program using C language