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Original question:

AM62L: AM62L Audio capability and MIC and Speaker Interface

TAS2110: I2S Audio Amplifier with Digital Mic Configuration with I2S Host

Fenil Ladani
Prodigy 110 points
Part Number: TAS2110

Tool/software:

Hi,

We are planning to use the TAS2110RPPR I2S audio amplifier in parallel to a digital mic (SPH0645LM4H-B) as per the below configuration. 

  • Could you please confirm if there would be any issues in using a common clock source for both the DMIC and the audio amplifier? Additionally, we are planning to use the I2S_SD_OUT pin for the audio amplifier input and the I2S_SD_IN pin for receiving DMIC output — is this configuration acceptable?

  • If we are interfacing the audio amplifier via I2S, what is the purpose of the amplifier's DOUT pin? Is it necessary to connect this pin to the host processor?

Please help me to adderess above queries.

Thank you.

  • +1
    TI__Guru** 109145 points

    Hi Fenil,

    Sharing clocks should be OK as long as the frequency of these clocks is supported by TAS2110.

    SDOUT and SDIN connections are also OK in this case.

    SDOUT from TAS2110 is optional, you can use this to send some data back to the host such as VBAT level, Temperature and Gain.

    Best regards,
    -Ivan Salazar
    Applications Engineer

  • 0 in reply to Ivan Salazar
    Prodigy 110 points

    Hi,

    Thanks for reply. As per above diagram I2S_SD_OUT and I2S_SD_IN both pins are configured with audio amplifier and digtal mic. so is the SDOUT pin from TAS2110 can be connected to any other I2S port GPIO or we can left it unused if not necessory.

  • +1 in reply to Fenil Ladani
    TI__Guru** 109145 points

    Hi Fenil,

    Yes, you can use a different I2S GPIO for TAS2110 SDOUT signal, or left floating if not used.

    Best regards,
    -Ivan Salazar
    Applications Engineer