Finally function and timing simulation are accomplished . in the hardware design , ftdi ' s ft245bm device is selected to accomplish usb interface . altera ' s epm7064 device is selected to accomplish jtag interface logic design 在接口电路硬件设计中,选用ftdi公司的usb控制芯片ft245bm ,实现usb物理层和链路层协议的解析, altera的可编程逻辑器件epm7064实现接口逻辑。