STM32H563 VDDA rising and falling control timig

tomy · ‎2025-03-21

I'm thinking to control for VDDA on the STM32H563.

I'm considering by the red line in the diagram below, but are there any problems?

I'm considering when VDDX independent from VDD, can be rising and falling VDDA.

Please advise for me.

Best regard.

AScha.3 · ‎2025-03-21

Hi,

your plan seems ok. (just make sure, never have vdda > vdd active.)

from ds H563:

So vdda can be zero, if not using adc..etc , when vdda < 2.1V .

btw

If you want smps for vdd for low power consumption , why not using the version with internal smps (H56xxxxQ ) ?

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