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TLV320AIC3100: MIC1LP related issues

Part Number: TLV320AIC3100

Two questions

1.What is the function of the input signal mic1lp transmitted to the DAC in the figure below?

2. If I only use sound input and speaker, can I only connect MIC1LP, MIC1LM,I2S interface,SPKP,SPKM.   Connect the interface in the figure below。The interface in the red box is not used

  • Hi Yang,

    The MICXX inputs are not going in the DAC. They are being summed with the output of the DAC to be sent to the speaker outputs. 

    Yes you can ignore the interface in red, except you might need the micbias output for proper mic operation.

    Best Regards,