计算机USB系统原理及其主从机设计。有助USB设计和开发。-Design of computer USB system theory and its master and slave. The help of USB design and development.

利用芯片CY7C63723设计的USB/PS2鼠标，含有所有驱动源代码和硬件原理图，对开发计算机USB或PS2设备很有参考价值，开发环境为keil C51.-USB/PS2 mouse chip CY7C63723 design contains all the driver source code and hardware schematics, the development computer USB or PS2 devices of great reference value, a de