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Slave mode of clock for PDM interface

SigmaDSP & SigmaStudio Yeongseok Sep 14, 2023 00:00 1 replies Original on forum ↗
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Yeongseok Question
Sep 14, 2023 00:00

Hello. Everyone.

Thank you for your help.

I am trying to set the slave mode of clock for the PDM interface with ADAU1787. But what I can only find in SigmaStudio is the clock for the PLL.

It will be more than help if I can get to know how to set the slave mode of the clock for the PDM interface.

Best regards

software

ADAU1787

slave mode

pdm

Integrated/Special Purpose A/D Converters

ADAU1787 evaluation board

Audio CODECs

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galvinpjg Reply
Sep 21, 2023 00:00

Yeongseok,

For the ADAU1787, the PDM_CLK is only an output for the PDM OUTPUT Interface. If able to tolerate the latency, the PDM_CLK output from your PDM interface could be routed to MCLK pin on ADAU1787. The PLL would need to be adjusted accordingly. Then, the PDM_DATA from ADAU1787 could be sent back to the interface and timed on your PDM_CLK. You would need to ensure the MCLK source is the PDM_CLK from your PDM interface to keep the timing domains synchronized.