Watchdog Interrupt Flag

rmaier — Tue, 17 Aug 2021 14:40:05 GMT

Hello,

I am using a KEAZ128 MCU. I am working on the watchdog, and would like to conditionally do some things depend on whether a POR or watchdog reset has occurred. I attempted to use the Watchdog flag (WDOG_CS2_FLG) at system initialization to catch this condition, but I cannot get WDOG_CS2_FLG =1. It's always 0. Does this flag only persist during the 128 bus clock cycles before reset? I am able to set a RAM variable to a particular value and catch this, but not the flag.

Any instructions or recommendations are greatly appreciated.

Robert

Re: Watchdog Interrupt Flag

nxf77486 — Tue, 17 Aug 2021 21:15:25 GMT

Hello @rmaier

The register SIM_SRSID (System Reset Status and ID Registers), indicates a reset by WDOG timer timing out (field 5). And also indicates that the reset has occurred on POR (field 7). This will help to catch whenever a reset has occurred so you can finish with the rest of your application.

topic Watchdog Interrupt Flag in Kinetis Microcontrollers

Watchdog Interrupt Flag

Re: Watchdog Interrupt Flag