USBN9603芯片的数据手册，里面详细的描述了改USB控制芯片的相关用法。 - May 1998 USBN9603/USBN9604 Universal Serial Bus Full Speed Node Controller with Enhanced DMA Support November 2002 Revision 1.2 USBN9603/USBN9604 Universal Serial Bus Full Speed Node Controller with Enhanced DMA Support General Description Outstanding Features The USB……