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tlk2711芯片使用问题



你好,请问tlk2711芯片,我想对芯片做个回环测试,发送端我给它时钟,txd0~txd15, tklsb和tkmsb给它低电平,enable=1,loopen=0;,locken=1,testen=0,prbsen=0,我用两根同轴线将输出和输入回环,测试过程中我发现芯片返回的时钟是正常的,和我发送的时钟频率一样,但是rxd0~rxd15和发送的数不一样,请问我应该怎样设置输出端的控制信号,使回环测试输出等于输入,谢谢。