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PCM5102EVM-U: How to connect external I2S source

Jay Yoo
Intellectual 2471 points
Part Number: PCM5102EVM-U


Hi team,

I'm trying to connect an external I2S source to PCM5102EVM-U. To do that I removed all the jumpers on W3. 

Then connected jumpers as below.

  • FLT: GND(normal latency)
  • SCK: GND to use internal PLL
  • BCK: external source(AP)
  • DIN External source
  • LRCK: External source(44.1khz)
  • FMT: 3.3V(Left jestified)
  • XSMTL 3.3V(un-mute)

And didn't use USB connection. supply power is given. However the output didn't come out.

Is there anything Any connection that I missed?

Thank you,

Jay

  • 0
    TI__Mastermind 31431 points

    Jay,

    You did not confirm you checked your clks and verified them on the EVM and verified they are getting to the DAC, but that is the first thing you should have checked.

    The individual jumpers on W3 connector,  passes the signals from left side of the board to the right side , so once a jumper is in, you are passing the signal that is generated on the left of the board to the DAC. For example if you are using the USB to send the signals (i.e music) then  leave the jumpers in . I myself use AP for all my I2S clks and I remove the corresponding jumper and then  connect them to the right side (pin) of the jumpers in W3. I can then verify my signals on the test points which are just  on the right side of the W3.

    So follow these steps to send the  I2S from AP

    1-Connect your I2S signals from AP to W3 (right pins). Use a 1KHz sinewave as your digital input

    2-Use USB to power the board.

    3- verify the board has power as you would expect

    4-Verify I2S signals are getting into the DAC by checking them at those test pints.

    5- You can connect the output of  the DAC to AP (to " Analog Input"  this can be either to XLR or BNC) and use analog analyzer or simply connect the DAC to Scope.

    6- monitor the output and see if it is the 1KHz sinewave that you sent in.

    I close this post for now but feel free to reply if you still can not get the output after following these steps.