topic K10 Watchdog Timeout Setting in Kinetis Microcontrollers

K10 Watchdog Timeout Setting

maxpag — Wed, 14 Dec 2016 13:58:53 GMT

I'd like to configure the watchdog timer on my K10. More precisely I can't find a formula to fill-in WDOG_TOVALH and WDOG_TOVALL from my timeout value expressed in seconds (or ms). I'm using LPO clock and WDOG_PRES is set to 0.

Re: K10 Watchdog Timeout Setting

Robin_Shen — Thu, 15 Dec 2016 06:19:29 GMT

The Watchdog Time-out Value Register defined in terms of cycles of the watchdog clock. WDOG_TOVALL defines the upper 16 bits of the 32-bit time-out value for the watchdog timer, and WDOG_TOVALL defines the lower 16 bits of the 32-bit time-out value for the watchdog timer.

Since you are using 1kHz LPO clock and WDOG_PRES is set to 0, one watchdog clock cycle is 1ms.

Your timeout value expressed in ms will equal to the 32-bit time-out value for the watchdog timer.

Best Regards,

Robin

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Re: K10 Watchdog Timeout Setting

Oleksii — Tue, 24 Nov 2020 20:31:28 GMT

So, to have 4s delay:
WDOG_TOVALH=0x0

WDOG_TOVALL=0x0FA0

Am I correct ?

Thank you very much in advance for the reply.