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External Watchdog/BOD circuit for STM32F1/F4 series

SProg
Associate III

Hello,

We are designing automotive devices (Trackets,Meters etc) and almost in all of our devices we use external watchdog with integrated BOD function.

We faced issues in the past during EMC/ESD tests, where the microcontroller's (AVR) BOD or watchdog internal circuit was frozen. We know about independent watchdog clock etc but does anyone faced watchdog/BOD issues on STM32 MCUs during tests?

What does ST recommend for the STM32Fx families?

In most of ours STM32 MCU based devices, we keep the external watchdog circuit.

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