topic Re: S32K146 watchdog timeout in S32K

S32K146 watchdog timeout

yqs77 — Wed, 10 Aug 2022 05:50:10 GMT

Hi,

I want to enable a watchdog with 10 minutes timeout on S32K146, and I have noticed that when CS[PRES] is set, the clock source is prescaled by 256 before clocking the watchdog counter which allows for longer timeout periods. But I am still wondering whether the watchdog timeout can be set to 10 minutes. If cannot, what is the maximum timeout? Thanks a lot!

Re: S32K146 watchdog timeout

Robin_Shen — Wed, 10 Aug 2022 07:16:48 GMT

WDOG has a programmable16-bit timeout counter. And the clock can be selected by WDOG_CS[CLK] and SIM_LPOCLKS[LPOCLKSEL]. If fixed 256 clock prescaler is enabled, then it's able to achieve 10 minutes timeout.

Best Regards,
Robin
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Re: S32K146 watchdog timeout

yqs77 — Wed, 10 Aug 2022 08:48:21 GMT

Thank you very much for the reply, that helps a lot!