how to check PDM (digital mic)

Discussion in 'The Projects Forum' started by Jani-Jan, Oct 4, 2010.

  1. Jani-Jan

    Thread Starter New Member

    May 20, 2010
    4
    1
    i am going to create a project that can check digital mic.
    and that can also simulate the pdm bus like digital mic.
    i am using pic 16f877a .
    any one help me how to pick pdm bus.
     
  2. bertus

    Administrator

    Apr 5, 2008
    15,645
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    Jani-Jan likes this.
  3. Jani-Jan

    Thread Starter New Member

    May 20, 2010
    4
    1
    thanks for giving me time.
    sorry if i cant specific my question.
    so now i try to explain more,

    i need to a device which can check a digital mic and digital mic uses pdm.
    so like a simple mic it cant be checked.
    and if i want to check its pre amp its also receive pdm bus its also cant be check by simple injecting a voice.
    its my question.
    thanks in advance.
     
  4. bertus

    Administrator

    Apr 5, 2008
    15,645
    2,344
    Hello,

    You need to know how the mic is sending the information.
    Do you know wich chip is used in the mic?

    From the analog faq's:

    Can digital microphone PDM output be interfaced with I²S directly? No, ADI ADAU1361, 1761 codecs should be used in this case.


    Bertus
     
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