I read the datasheet and tried in the SS, I think the anwser is NO. But I want to confirm it --- Can ADAU1701 support TDM and I2S mixed up input? Thanks.
Your understanding is correct. It's not possible to mix TDM and I2S inputs.
The reason this is not possible is that the BCLK signal corresponds to the number of channels in the data stream.
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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