18.4.3 Watchdog Lock

WDT0_MR and WDT1_MR can be written until a LOCKMR command is issued in the corresponding WDT0_CR or WDT1_CR. Once locked, only a processor reset resets WDT0_MR and WDT1_MR. As long as a WDT is not locked, writing WDT1_MR or WDT0_MR automatically reloads the corresponding Watchdog timer with the newly programmed mode parameters.

If the watchdog is restarted by writing into the corresponding Control register (WDT0_CR or WDT1_CR), the corresponding WDT0_MR or WDT1_MR must not be programmed during a period of time of three MD_SLCK periods following the WDT0_CR or WDT1_CR write access.