PDR_ON Floating

shubhenduatadben · ‎2025-01-29

Dear,

We are working on a custom design which has PDR_ON pin floating. The board is already fabricated and assembled.

The part number is STM32H7A3AII6Q.

Please let us know if this has any consequences on normal operation of the MCU and if so, what's the wayout.

Regards-

Shubhendu

SofLit · ‎2025-01-29

Hello,

PDR_ON pin needs to be pulled up to VDD or pulled down to the VSS.

Since you forgot to do that, you may face instability especially on the reset behavior when the power is low and also instability on the VBAT usage:

AN5307:

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