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TLV320AIC3100: The description on the datasheet P50

Part Number: TLV320AIC3100


Hi all

Would you mind if we ask TLV320AIC3100?

There is the description on the datasheet P50 as follows;
"During soft-stepping, the host does not receive a signal when the DAC has been completely muted. This may be important if the host must mute the DAC before making a significant change, such as changing sample rates. In order to help with this situation, the device provides a flag back to the host through a read-only register, page 0 / register 38, bit D4 for the right channel. This information alerts the host when the part has completed the soft-stepping and the actual volume has reached the desired volume level."

<Question1>
1. Soft-stepping function=valid
2. Setting DAC Digital Volume P0/R65[D7–D0], P0/R66[D7–D0]
3. DAC Mute setting
Soft-stepping function on DAC Digital Volume might not be finished, in this case, is DAC Mute setting ignored?

<Question2>
In relation to <Question1>, if DAC Mute is ignored, 
In case of DAC Mute release setting -> DAC Digital Volume setting
is DAC Digital Volume setting ignored also?

<Question3>
In case of ADC Mute, is it the same as DAC Mute?

Kind regards,

Hirotaka Matsumoto

  • Matsumoto-san,

    muting the DAC and Setting the DAC volume to the minimum setting, and then muting will result in very similar results. the DAC MUTE will use the soft-step function. If for example the DAC volume was set to 0dB, then changed to -70dB, and while the DAC volume was being soft stepped down the DAC was Muted. the Mute would be doing exactly the same thing that the Volume control would've done.

    now if the reverse happened, and the DAC volume was set at -70, and then changed to 0dB and while the DAC volume was soft stepping up, the DAC was muted, I believe the Mute would take precedence over the volume control.

    in general I recommend sticking to setting the volume where you ultimately want it, and then unmute.


    Best regards,
    -Steve Wilson