umti协议中的usb1.1的verilog原文件，可公实现usb2.0做参考-umti the agreement usb1.1 verilog the original documents, the public can refer to achieve usb2.0

usb2.0协议层的verilog hdl实现-usb2.0 protocol layer implementation verilog hdl

usb2.0的IP核，对于USB接口通信的FPGA设计有很大帮助，对于接口硬件的控制更为灵活。 有详尽的USB2.0协议说明-usb2.0 IP core for FPGA design of the USB interface communication, more flexible control interface hardware. Detailed USB2.0 protocol descr iption