Information

Section number Title Page
22.4.2 The EWM_in Signal....................................................................................................................................477
22.4.3 EWM Counter..............................................................................................................................................478
22.4.4 EWM Compare Registers............................................................................................................................478
22.4.5 EWM Refresh Mechanism...........................................................................................................................479
22.4.6 EWM Interrupt.............................................................................................................................................479
Chapter 23
Watchdog Timer (WDOG)
23.1 Introduction...................................................................................................................................................................481
23.2 Features.........................................................................................................................................................................481
23.3 Functional overview......................................................................................................................................................483
23.3.1 Unlocking and updating the watchdog.........................................................................................................484
23.3.2 Watchdog configuration time (WCT)..........................................................................................................485
23.3.3 Refreshing the watchdog..............................................................................................................................486
23.3.4 Windowed mode of operation......................................................................................................................486
23.3.5 Watchdog disabled mode of operation.........................................................................................................486
23.3.6 Low-power modes of operation...................................................................................................................487
23.3.7 Debug modes of operation...........................................................................................................................487
23.4 Testing the watchdog....................................................................................................................................................488
23.4.1 Quick test.....................................................................................................................................................488
23.4.2 Byte test........................................................................................................................................................489
23.5 Backup reset generator..................................................................................................................................................490
23.6 Generated resets and interrupts.....................................................................................................................................490
23.7 Memory map and register definition.............................................................................................................................491
23.7.1 Watchdog Status and Control Register High (WDOG_STCTRLH)...........................................................492
23.7.2 Watchdog Status and Control Register Low (WDOG_STCTRLL)............................................................493
23.7.3 Watchdog Time-out Value Register High (WDOG_TOVALH).................................................................494
23.7.4 Watchdog Time-out Value Register Low (WDOG_TOVALL)..................................................................494
23.7.5 Watchdog Window Register High (WDOG_WINH)..................................................................................495
23.7.6 Watchdog Window Register Low (WDOG_WINL)...................................................................................495
K20 Sub-Family Reference Manual, Rev. 1.1, Dec 2012
18
Preliminary
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