STM802 supervisor: disable the watchdog

[rbott.1]

I would like to use the STM802 as a supervisor but I need to disable the watch dog intervention in certain conditions (for example firmware update).

The manual says that the WDI pin cannot be left floating to block WD intervention.

Is there any other way?

Is there another ST IC that allows this function?

The system is 3.3V

Thanks

Robert

[Peter BENSCH]

Welcome, @rbott.1​, to the community!

No, it would only be possible either to switch off the supply voltage of the STM802 or, alternatively, to disconnect the reset output from the device to be reset.

STMicroelectronics also does not have a supervisor in its portfolio that can be disabled via a pin (which is also a little contrary to the function of a supervisor) - typically an MCU, such as the STM32, can monitor itself with functions such as IWDG and brown-out detection.

Good luck!

If the problem is resolved, please mark this topic as answered by selecting Select as best. This will help other users find that answer faster.

/Peter

[Winfred LU]

Maybe it is worth to take a look to STM706T/S/R that has a dedicated watchdog output pin.

You may design the system to ignore the watchdog output asserting during the conditions such as firmware updating.