If the interface is different then some translation needs to be done and you might as well do that inside this data layer.
如果这些接口不同，你则需要在这个数据层内做一些数据翻译的工作。
The hardware design mainly includes signal detect circuit, electrical level translation circuit, microcontroller interface circuit, data communication circuit and so on.
在硬件电路设计方面完成了信号检测电路、电平平移电路、单片机接口电路以及数据通信等电路的设计。
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