I2S Input - MP0,4,5 are all 3.3V?
I'm a little lost here. I'm trying to get I2S input working on an ADAU1701. I've spent countless hours debugging things, making shorter cables, wrapping cables in a ground, all without success. Then I realized that the MP0, MP4, and MP5 are all producing a 3.3V. It's as though they're set as an output and I cannot for the life of my figure out why.
Besides the schematic, and configuring the ports in the control register section is there something else I need to do to make them input ports?
Thanks,
Gus
Audio Signal Processors
SigmaDSP Audio Processors
adau1701
Hi Gus,
Are you using the ADAU1701 evaluation board? The chip does hold the input bus high -- however, that should not affect the I2S operation.
Be sure you use an external MCLK from the I2S master; the EVAL-ADAU1701MINIZ user guide specifies that the source needs a synchronous MCLK.
Attached is an example SigmaStudio project that has a working signal flow for I2S in -> DAC out. On the eval board, this corresponds to the J7 I2S header going to the J6 stereo 3.5mm jack.
Regards,
Tyler
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