23.4.2 Watchdog Reload

In normal operation, the user reloads the watchdog at regular intervals before the down counter reaches 0, by setting PS_WDT_CR.WDRSTT or NS_WDT_CR.WDRSTT with the right KEY field. The watchdog counter is then immediately reloaded with the PERIOD value and restarted, and the MD_SLCK 128 divider is reset and restarted. Writing PS_WDT_CR or NS_WDT_CR with a wrong key has no effect.

Writing PS_WDT_MR, PS_WDT_WLR or PS_WDT_ILR immediately reloads the counter from PERIOD and restarts the MD_SLCK 128 divider of PSWDT.

Writing NS_WDT_MR, NS_WDT_WLR or NS_WDT_ILR immediately reloads the counter from PERIOD and restarts the MD_SLCK 128 divider of NSWDT.