Studying firmware design method by USB2.0 CMOS chip working in collaboration with FPGA cooperation and per work model characteristic, Realizing reasonable firmware designing and working model.

• 2；介绍了USB2.；0芯片配合FPGA共同工作的固件设计方法及各个工作模式的特性；实现了满足需要的固件设计和工作模式设置。