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Difference between IWDG watchdog reload RLR Register and WINR window register

A Maq
Senior

I am working with STM32F779 MCU and using IAR Embedded Workbench IDE for programming the chip.

I have a situation where I am using a IWDG independent watchdog timer in window option enabled mode. That is loading window value in IWDG_WINR register.

Can anyone tell the difference between Reload value (IWDG_RLR) and WINR value. Should I use same value for both registers?

Also, my understanding is that once RLR loaded for rest of the time loading WINR will result in automatically re loading ​RLR without writing Aaaa in KR register is that right?

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