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CC8520 Configurator - Audio Inputs

Alto
Prodigy 210 points

Other Parts Discussed in Thread: CC8520

Hello,

I can't udesrtand, how to change the inputs at the Demo Board.

Bu default there are line inputs, I wish to change to the microphone inputs, How to do this?

My final application requires R-channel as line input (single or differential, does not matter) and L-channel as differentoal microphone.

BTW, I did not find in the AIC3101 the parameter "CMRR" for the differential inputs, any idea?

 

  • 0
    TI__Expert 6825 points

    Hi Alto,

    To configre the AIC3101 codec as you want it, you need to enable "Custom setup" under Audio Interface in the PurePath Wireless Configurator. In the "Audio device customization" you can write the I2C transaction you need to set-up the codec as you want it. The other two thing you probably need is the schematic of the AudioEB and the AIC3101 data sheet. The schematic of the AudioEB can be found in the CC85xxDK.

    Cheers,

    Pelle

  • 0 in reply to Per H
    Prodigy 210 points

    Hi Pelle,

    thank you for your reply.

    I have a schematic and datasheet, the question how to adjust the PurePath configurator settings.

    If I understood correctly, I have to change the sequences in "OFF to INACTIVE" and IWNACTIVE to Low Power" - only at this sequences I found the lines, dedicated to the ADC Inputs.

     

    BTW, if  I also use Power Managenent (in autonomous config.) and press the power control button - at what state CC8520 and AIC3101 will be, at OFF, INACTIVE or Low Power?

    I with to obtain the current consumption as lower as possible. Or it is better instead of Power Management control, to use power switch at the VCC?

  • 0 in reply to Alto
    TI__Expert 6825 points

    Hi Alto,

    The only power mode currently supported by the CC8520 is OFF and ACTIVE. In future FW releases there will be a more extensive support for "power modes". Yes, you can, of course, "cut the power" to the devices. However, by powering down the device using the power managment control you will be able to turn off the audio codec etc in a correct way. By just cutting the power you will get "pops and clicks", these can be avioded if the codec is powered down correctly. Note the CC85xx consumes less than 1uA in power down.

    Pelle

  • 0 in reply to Per H
    Prodigy 210 points

    Hi Pelle.

    If you said that currently only OFF and ACTIVE mode used, what transition configuration in the "Audio Device Ccustomisation" I should use and adjust?

    Or you mean that the device sequentially passes OFF-INACTIVE-LP-ACTIVE / ACTIVE - LP-INACTIVE-OFF ?

    Because there are no "OFF-ACTIVE" transition in the setup, only OFF-INACTIVE, INACTILE-LP, LP-ACTIVE and back.

     

    Alto.

     

  • 0 in reply to Alto
    TI__Expert 6825 points

    Alto,

    Yes, it passes though all states when going from OFF to ACTIVE and vice versa.

    Pelle

     

  • 0 in reply to Per H
    Prodigy 210 points

    Thanks Pelle,

    Clear.

     

    Alto.

     

  • 0 in reply to Alto
    Prodigy 125 points

    i figured out how to enable the microphone inputs on the cc85xxdk audio EB (aic3101 codec).  Here's the procedure:

    0. Load the "CC85XXDK Preloaded Demo" project in the PPWC

    1.  Do as Pelle mentions "To configre the AIC3101 codec as you want it, you need to enable "Custom setup" under Audio Interface for "Analog Input Master (AIC3101)" in the PurePath Wireless Configurator. In the "Audio device customization" you can write the I2C transaction you need to set-up the codec as you want it."

    2. Once the "Audio Device Customization" item appears change to that panel.  "Insert the default sequence" for the three states from OFF to INACTIVE, INACTIVE to LOW-POWER and LOW-POWER to ACTIVE.  i'm not sure why this is necessary, but i had to insert them even if they weren't modifed.

    3. Insert into the I2C sequence for OFF to INACTIVE to set the gain levels for the microphone inputs:

    w 30 11 F0 # configure register 17 to set the mic2l gain to 0db
    w 30 12 0F # configure register 18 to set the mic2r gain to 0db

    4. Insert into the I2C sequence for OFF to INACTIVE to set the micbias (to one of the powered values):

    w 30 19 80 # configure register 25 to set the micbias to 2.5v

    5. Reflash the Analog Input Master (AIC3101)

    This will cause the microphone input to mix with the line-in input (good karaoke setting:-)

     

  • 0 in reply to trlowe
    TI__Expert 6825 points

    Thanks for sharing how to set it up in a good karaoke setting! Rock n roll!  :-D

     

    -P

  • 0 in reply to Per H
    Prodigy 80 points

    Hi all,,

     

    Since I was a newbie, I've just configured my first wireless audio and my microphone was enabled but there's some problem like a noise .. how can I reduce that the noise?

     

    Thx

  • 0 in reply to gum milard
    TI__Expert 7160 points

    Hi Milard,

    Can you describe a little more in detail what you are doing? What hardware are you using and what settings in the Configurator?

    Thanks