PVD on STM32L4 with external input

CanRF · ‎2025-01-10

Hi

On STM32L4xx Ref Man

Programmable voltage detector (PVD) supports external input PVD_IN.

How to configure the GPIO for PVD_IN (ex STM32L4 PB7)?

How to configure VREFINT?

Is there any example?

RomainR. · ‎2025-01-10

Hello @CanRF

As an example on STM32L476 device (Nucleo-L476RG)

According to DS10198 Rev 11 in Table 16. PVD_IN is an additional function connected to PB7.
And in RM0351 Rev10, PVD can be configured in PWR_CR2 bits PLS[2:0] = 111.

In STM32CubeMX here the possible PVD levels configurations:

The internal voltage reference VREFINT is calibrated in production with VDDA=VREF=3.0V at 30°C, is around 1.2V (see DS10198 Table 26) and it is enabled when VDDA and VSSA are supplied.

Best regards,

Romain,

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