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PCM1864 I2S Input

allan chiang
Intellectual 620 points

Other Parts Discussed in Thread: PCM1864

It will in the Datasheet PCM1864 has indicated I2S channel, but to ask how to use

Here is what I hope to use PCM1864 achieve a functional block diagram

Allan

  • 0
    TI__Mastermind 28120 points
    Hi Allan,

    This application should be possible with the PCM1864. It will require the following setup in the PCM1864:

    1. BCK = 256*Fs and the audio interface set to TDM mode, with 32 bit resolution (24 bit audio with 8 bit padding per channel)
    2. Select one GPIO as DIN, then configure the Digital Mixer to mix the DIN signal with the mics according to your application.
    3. Configuring the inputs for the types of mic, need a bias?, digital mics?, PGA gain to compensate?
    4. I see an MCLK input, but which device will be the master? The PCM1864 can be either slave or master.

    I am sure there is more that can be done/setup with the PCM1864 in this application but this is a starting point. Let me know if you have any more questions.

    Justin