对于U盘的固件的程序设计，描述符的配置，端口的中断处理，数据的读取都有处理。-U site for the procedure firmware design, configuration descr iptor, the port handled the interruption, have read the data processing.

U盘设计开发，有固件分析和源代码，usb接口传输数据很快。-U disk design, development, analysis and source code with firmware, usb interface to transmit data quickly.