Can ADAU1701 support TDM and I2S mixed up input?

Jackie,

Your understanding is correct. It's not possible to mix TDM and I2S inputs.

Thanks,

Brett

The reason this is not possible is that the BCLK signal corresponds to the number of channels in the data stream.

I2S (2 channels) has 64 bit clock cycles per audio sample.

TDM4 (4 channels) has 128 bit clock cycles per audio sample.

TDM8 (8 channels) has 256 bit clock cycles per audio sample.

So, it's not possible to use multiple modes at the same time, since there is only one BCLK signal and it can have only one frequency at any time.

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EZ Admin