MP34DT06JTR mic is not working my custom board

[Vineet_872]

Hi,

I am using MP34DT06JTR mic with my custom board with Micro-controller STM32U535CET6.

I am unable to get the data form mic with my custom board. MIC schematic screen shot and Signal wave form of CLK and DATA screenshot given below.

can you please verify this all.

Yellow signal for CLK and Blue one is for Data.

sample rate for audio data is 16Khz in software.

I have tried the same MIC with EVK Nucleo-U545RE with X-NUCLEO-CCA02M2, there sound from MIC is perfectly working fine with the same code..

Please help me in this issue ASAP

Thanks

[Federica Bossi]

Hi @Vineet_872 ,

The schematic is ok and the PDM signals seem ok. Only thing we observed is following:
onboard microphones of X-NUCLEO-CCA02M2 are connected to PDM12 (SB9 closed) and their signal are routed on Morpho connector CN10 pin 26 (PDM) and pin 29 (CLK). In NUCLEO-U545RE these pins are connected to PA3 (CLK) and PA10 (PDM) pin of STM32. In sent schematic the PDM and clock are connected to PB5 and PB15 of STM32U535CET6.
Which interface have you used in your application? Is this interface equal to STM32U545?

[Vineet_872]

Thanks all,

issue was fixed, there was the soldering problem which is debug by hardware team. Now it`s working fine in my custom board.

[Andrew Neil]

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@Vineet_872 wrote:

issue was fixed.

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Thanks for the update.

Now please mark the solution - see:

https://community.st.com/t5/community-guidelines/help-others-to-solve-their-issues/ta-p/575256