目前在调试TLV320IPW 音频方案,在调试过程中,发现一直存在两种噪音,一直存在滋的声音和另外一种类似震动的噪音,我通过修改晶振的的滤波电容(20pF修改25pF),震动的声音消弱了,滋的声音一直存在,无法消除,同时在我手触碰晶振的时候,噪音(震动声加重,滋的噪音变得尖锐),想咨询或讨论一下如何解决噪音问题
工作模式,AIC23是主模式,数据为DSP模式
Uint16 digital_audio_inteface_format[2]={0x0e,0x53}; // 16位是0x53 32位是0x5f
/*AIC23的波特率设置,采样率为44.1K*/
Uint16 sample_rate_control[2] = {0x10,0x22};
/*AIC23寄存器复位*/
Uint16 reset[2] ={0x1e,0x00};
/*AIC23节电方式设置,所有部分均在工作状态*/
Uint16 power_down_control[2] ={0x0c,0x02};
/*AIC23模拟音频的控制DAC使能,ADC输入选择为Line*/
Uint16 analog_aduio_path_control[2] ={0x08,0x12};
/*AIC23数字音频通路的控制*/
Uint16 digital_audio_path_control[2] ={0x0a,0x05};//0x0a,0x00
/*AIC23数字接口的使能*/
Uint16 digital_interface_activation[2] ={0x12,0x01};
/*AIC23左通路音频调节*/
Uint16 left_line_input_volume_control[2] ={0x00,0x17};
/*AIC23右通路音频调节*/
Uint16 right_line_input_volume_control[2] ={0x02,0x17};
/*AIC23耳机左通路音频调节*/
Uint16 left_headphone_volume_control[2] ={0x04,0x71};
/*AIC23耳机右通路音频调节*/
Uint16 right_headphone_volume_control[2] = {0x06,0x71};
附上原理图,