RM0455 STM32H7A/B: Reset state of SYSCFG_PMCR incorrect?

[Andreas Bolsch]

RM0455, rev. 6, says reset state of SYSCFG_PMCR is 0x0F00 0000.

But STM32H7A3ZIT6Q, rev. Z, shows 0x0300 0000 instead, i.e. PC2 and PC3 switches closed. not open. Does this depend on package as PC2 and PC3 are not bonded out for this particular package?

[TDK]

FWIW, on my STM32H7B3I-DK board, the reset value is 0, barring any bugs in the SVD file. That chip has all 8 pins present.

[Andreas Bolsch]

Hm, for STM32H7B3LIH6Q, rev. Z, on STM32H7B3I-DK I see reset value 0x0F00 0000 ...

That you observed 0 might be due to disabled clock, i.e. SYSCFGEN in RCC_APB4ENR not being set.

[Imen.D · Accepted solution]

Hello @Andreas Bolsch (Community Member)​ ,

In fact, the value depends on the packages.

Imen

[Andreas Bolsch]

Makes sense, indeed, although at first somewhat unexpected ;-)

[TDK]

You're probably right, that slipped my mind.

[waclawek.jan]

Shouldn't that still be properly documented?

JW

[Imen.D]

Hi @Community member​ ,

I raised the same feedback internally :)

Thanks

Imen

[waclawek.jan]

Thanks, Imen.

Jan