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AIC23B 麦克风问题



请问,我在设置AIC23时,

            如果是AIC23_writeRegister(0X04, 0x011); 手机输入音频信号,能正常输出

           但如果设置成AIC23_writeRegister(0X04, 0x015); 麦克风输入,没有输出

这是少设置什么寄存器吗?