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PCM1864的18脚DOUT无输出,直接低电平,BCK和LRCK正常

Other Parts Discussed in Thread: PCM1864

PCM1864的DOUT无数据输出,一直保持低电平状态,BCK和LRCK正常,1864的输入端正常接入无源MIC,由MIC_BIAS提供电平给MIC。

按道理说即使输入端没有任何信号,输出端也应该有一些杂波,一些干扰,现在就一低电平,很是郁闷,求教求教!!