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我试图从PC通信通过一个转换器和75176 adam232/485 PIC16F877的。但似乎是一个问题的地方。我连75176 Pin1到接收PIC的,引脚4到TX,2&3 75176控制数据流和连接的目的,它的RC4引脚短路。任何终端电阻必须在A&B吗?也可以你告诉我的针脚是否75176开放收藏家?
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