Section number Title Page
24.2 Features.........................................................................................................................................................................521
24.3 Functional overview......................................................................................................................................................523
24.3.1 Unlocking and updating the watchdog.........................................................................................................524
24.3.2 Watchdog configuration time (WCT)..........................................................................................................525
24.3.3 Refreshing the watchdog..............................................................................................................................526
24.3.4 Windowed mode of operation......................................................................................................................526
24.3.5 Watchdog disabled mode of operation.........................................................................................................526
24.3.6 Low-power modes of operation...................................................................................................................527
24.3.7 Debug modes of operation...........................................................................................................................527
24.4 Testing the watchdog....................................................................................................................................................528
24.4.1 Quick test.....................................................................................................................................................528
24.4.2 Byte test........................................................................................................................................................529
24.5 Backup reset generator..................................................................................................................................................530
24.6 Generated resets and interrupts.....................................................................................................................................530
24.7 Memory map and register definition.............................................................................................................................531
24.7.1 Watchdog Status and Control Register High (WDOG_STCTRLH)...........................................................532
24.7.2 Watchdog Status and Control Register Low (WDOG_STCTRLL)............................................................533
24.7.3 Watchdog Time-out Value Register High (WDOG_TOVALH).................................................................534
24.7.4 Watchdog Time-out Value Register Low (WDOG_TOVALL)..................................................................534
24.7.5 Watchdog Window Register High (WDOG_WINH)..................................................................................535
24.7.6 Watchdog Window Register Low (WDOG_WINL)...................................................................................535
24.7.7 Watchdog Refresh register (WDOG_REFRESH).......................................................................................536
24.7.8 Watchdog Unlock register (WDOG_UNLOCK).........................................................................................536
24.7.9 Watchdog Timer Output Register High (WDOG_TMROUTH).................................................................536
24.7.10 Watchdog Timer Output Register Low (WDOG_TMROUTL)..................................................................537
24.7.11 Watchdog Reset Count register (WDOG_RSTCNT)..................................................................................537
24.7.12 Watchdog Prescaler register (WDOG_PRESC)..........................................................................................538
24.8 Watchdog operation with 8-bit access..........................................................................................................................538
24.8.1 General guideline.........................................................................................................................................538
K50 Sub-Family Reference Manual, Rev. 2 Jun 2012
20
Preliminary
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