描述
USB通信部分选择Philips公司的PDIUSBD12[5]芯片作为系统的USB接口器件,片内集成了高性能USB接口电路、SIE、FIFO存储器、收发器以及电压调整器等,可与任何外部控制器或微处理器实现高速并行通信,其速率为2Mb/s,完全能够满足设计所要求的数据传输速度。USB通信接口模块电路如图4所示。
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