I do not use VBAT in my project. So I connect the VBAT pin to ground.
But I want to use the external 32K for the AFE.
Now I find that the external 32K cannot be initialized.It always stays in the function " PLL_Enable (PLL32KREF_SRC1); ".
Is it affected by the VBAT pin connected to ground?
Hi,
Please check below KM34 block diagram, the 32K OSC was powered from VBAT pin.
Thank you for the attention.
Have a great day,
Ma Hui
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