STM32U Series Ultra Low Power No-Vref Pin

tensaisakuragi06 · ‎2024-09-24

Hi friends. With using STM32U535 microcontroller, i plan to make a project. The project includes 3.6V battery cell. We read adc values when this battery cell supplies the microcontroller. When the battery voltage decreases, the reference voltage should not be altered. Because of this situation, i think i need a vref pin on microcontroller. If i am not wrong, this microcontroller does not have vref pin for this purpose. Do you have any recommendation for me about this situation?

TDK · ‎2024-09-24

> As we supply the Vdd with 3.3V and Vdda with 2.5V individually, i can get 2.5V reference voltage? Am i understand you correctly?

Yes. Relevant datasheet statements are here:

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