How many PVD in STM32G4xx? Error in RM0440 or in devices files ?

[Nikita91]

In RM0440 R6 6.2.3 there is "Each of the four PVMx (x=1, 2)". So 4 or 2 PVM ?

In the PWR_CR2 register 6.4.2:

Bit 7 PVMEN2: Peripheral voltage monitoring 4 enable

Bit 6 PVMEN1: Peripheral voltage monitoring 3 enable

=> PVMEN1 is for PVM1 or PVM3?

=> Only 2 PWM specified

In the file stm32G431xx.h:

There is bits définitions for 4 PVM.

Example for PVM1:

#define PWR_CR2_PVME1_Pos            (4U)
#define PWR_CR2_PVME1_Msk            (0x1UL << PWR_CR2_PVME1_Pos)              /*!< 0x00000010 */
#define PWR_CR2_PVME1                PWR_CR2_PVME1_Msk 

This define PVME1 (Not PVMEN1 as in the RF) as bit 4. The bit 4 is not specified in the RM.

So my question: how many PVMs and what bits to use in PWR_CR2 ?

[Imen.D · Accepted solution]

Hello @Nikita91​ ,

Thank you for pointing out this issue.

In STM32G4xx, there is only 2 PVMx (x=1,2).

So, in RM0440 the PVMENx should be renamed to PVMEx (to be in line with HAL definitions):

 

Also, the mistake of 4 PVM thresholds will be corrected and this text should be updated (remove "..the four") :

 

Note that the next revision of the RM0440 is planned in the first quarter of 2022.

Thank you once more for your contribution.

When your question is answered, please close this topic by choosing Select as Best. This will help other users find that answer faster.

Imen

[Nikita91]

Thank you for the manual clarification.

But what is the correct PWR_CR2 bit to use for PVM1: bit 6 as in RM or bit 4 as in stm32G431xx.h ?

[Imen.D]

It's Bit 6. as in RM0440.

[Nikita91]

@Imen DAHMEN​  : So don't forget to fix CMSIS files like stm32G431xx.h

[Imen.D]

Hi @Nikita91​ ,

For sure ;) An internal ticket ID 119593 is submitted in order to correct the CMSIS files.

(PS: Internal ticket ID 119593, this is an internal tracking number and is not accessible or usable by customers).

Thanks

Imen