IWDG reset and data retention

[deckhard]

Hi

following a reset by the IWDG, does the SRAM1 or SRAM2 keep their content?

Thanks

[TDK · Accepted solution]

SRAM is retained on reset, as long as you don't lose power. Although most variables are initialized to zero or whatever their starting value is in the startup script.

[deckhard]

Do you know where it is done on the IAR startup script?

[deckhard]

How can I save some data in SRAM and read it again following a reset?

[TDK]

I am not familiar with IAR.

In STM32CubeIDE, you can mark sections in the linker as NOLOAD which will prevent initialization.