1.The simulation results of QUARTUS II demonstrate the correctness of the design.
QUARTUSII中的仿真结果证明了设计的正确性。
2.QUARTUS used by the compiler, and other precision frequency, I am wrong. But there are several warning (not affect design).
用QUARTUS编译通过的等精度频率计，我错误，但有几个警告（不影响设计）。
3.Quartus II Integrated Synthesis uses the if condition to identify the two asynchronous resets and, by implication, the clock. Quartus II
软件集成的综合使用，如果条件确定两个异步复位，并暗示，时钟。
4.use different eda tools , including modelsim , synplify , quartus , etc . at different stages of what has been designed
在设计的不同阶段使用了不同的eda工具，包括modelsim、synplify、quartus等等。
5.after these , the usb host controller was simulated , synthesized and placed and layout by activehdl , synplify and quartus ii
并分别以activehdl、synplify，和quartus完成了usb主控制器的前后仿真、综合与布局布线。