Watchdog timer problem with low temperature

Hi All,

On a custom board we have notice weird behaviour with the watchdog timer.

Indeed sometimes on low temperature (closer to 0°C) the board is unable to restart normally on WDT reset.

On WDT reset, the scheduler restarts during few ticks and hangs.

Any ideas would be will be very appreciated.

Regards

This topic has been closed for replies.

Senior III

I would check my oscillators first - are all running at correct frequency?

Than I would escalate to power supplies

An have a look at Watchdog registers

Principal

As mentioned, this sounds very much like a hardware issue.
Either external clock generation (quartz), or the power supply.

I suggest to check if and where your MCU has a MCO output.
Instrument your code, and watch MCO during such low-temperature restart events.

Sign up