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SN65HVD379 RS485/RS422功能怎么切换使用

Other Parts Discussed in Thread: SN65HVD379

您好,

     现在设计中用到了SN65HVD379,想用这个芯片的RS422功能,收发是分开的,但是在调试中发现发送数据时接收端会收到相同的数据,感觉发数据线和收数据线内部是连在一起的,这个芯片的RS485/RS422功能怎么切换啊?