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TLV320AIC3204EVM-K: Configuring the TLV320AIC3204EVM-K for digital mic input

Leo Costello
Prodigy 150 points
Part Number: TLV320AIC3204EVM-K

Hello all,

How do you configure the TLV320AIC3204EVM-K for a digital microphone input. The digital mic has an I2S outpput.

Thanks very much.

Leo

 

  • 0
    TI__Guru* 84915 points

    Hi, Leo,

    In order to use the TLV320AIC3204EVM-K with a digital microphone input, it is necessary to configure two digital I/O pins as digital microphone clock and data. Please find attached a .zip folder that contains some scripts to configure the digital microphone at different sampling rates. In these examples, SCLK pin is used as Digital Mic Data and the MISO pin is configured as Digital Mic Clock.

    6281.AIC32x4_MIC_SCRIPTS.zip

    Please let me know if you have additional questions or comments.

    Best regards,
    Luis Fernando Rodríguez S.

  • 0 in reply to Luis Fernando Rodriguez S.
    Prodigy 150 points
    Hi Luis, I tried reviving my board by following the "How to Revive a USB Audio EVM" procedure but the AIC3254 CS software shows EVM disconnected. Is there a remedy to this?

    Thanks.

    Leo
  • 0 in reply to Leo Costello
    TI__Guru* 84915 points
    Hi, Leo,

    Could you verify if the EVM has all the jumpers and switches in the default state?

    What about the EVM drivers? Does the PC recognize the EVM in the device manager?

    Best regards,
    Luis Fernando Rodríguez S.
  • 0 in reply to Luis Fernando Rodriguez S.
    Prodigy 150 points

    Hi Luis,

    Today I double-checked that all the switches and jumpers are in the default state (I ran this board a few weeks ago and it worked, and I haven't touched the switches and jumpers since, but I re-confirmed that today).

    When I followed the "How to Revive a USB Audio EVM" procedure there was an ambiguous area:

    2. Remove the USB cable from the board.

    3. Short SDA and SCL lines by shorting the EEPROM SDA and SCL pins (not the test points).

    4. Connect the EVM board to the USB socket.

    5. After 5 seconds, remove the short.

    On the board the test points are actually connected directly to the EEPROM pins, so step 3. is confusing. The other interpretation is to use the J6 SDA and SCL signals (J6-1 and J6-3), but these pins are connected to the EEPROM via a level shifter. I tried following the revive procedure both ways, and neither worked. So I'm stuck.

    Thanks.

    Leo

  • 0 in reply to Leo Costello
    TI__Guru* 84915 points
    Hi, Leo,

    Did you notice something different in the EVM when it worked and now? Additionally, when did you notice that the EVM didn't work? Did you use the EVM for a different purpose? More information would be helpful.

    Regarding the revival procedure, you may use the I2C test points. You should be able to revive the EVM with these points. Finally, could you verify how the Device Manager recognizes the EVM when it is connected?

    Best regards,
    Luis Fernando Rodríguez S.
  • 0 in reply to Luis Fernando Rodriguez S.
    Prodigy 150 points

    Hi Luis,

    Sorry for the delay, and thanks for following up. The EVM sat in my drawer over Christmas break so I don't think it was used for anything else.

    I'll get you some more information about what happens during revival, etc.

    Thanks.

    Leo