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adau1446 input / output continuity

SigmaDSP & SigmaStudio benybiles Jun 29, 2018 00:00 1 replies Original on forum ↗
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benybiles Question
Jun 29, 2018 00:00

Hi, I have

TDM2 16bit I2S selected on input 4

TD8 16bit I2S selected for output 4

on the adau1446. I'm switching clock domain 4 SD pin from input to output mode and switching the input/output on/off depending if I'm recording or playing back audio.

I'm not really getting what I expect to see on the scope.

I'm assuming the TDM8 should be 32bits per slot ( 24bits padded with zeros to make a 32bit slot ? )

I2S stereo I2S TDM2 to be 2 x 16bits

is there a conflict here by using different modes on the same clk domain even if I'm switching them on/off and switching SD4 input/output mode ? or this should work ?

Audio Signal Processors

dsp

adau144x

clock domain

adau1446

timing

i2s

tdm8

SigmaDSP Audio Processors

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benybiles Reply
Jul 3, 2018 00:00

I'm starting to think I have another issue as there is a ghosting of TDM8 channels in the scope. I'll open another question.