Rev. 1.0, 02/00, page 359 of 1141
17.5.2
Changing Value of CKS2 to CKS0
If bits CKS2 to CKS0 in WTCSR are written to while the WDT is operating, errors could occur in
the incrementation. Software must stop the watchdog timer (by clearing the TME bit to 0) before
changing the value of bits CKS2 to CKS0.
17.5.3
Switching between Watchdog Timer Mode and Interval Timer Mode
If the mode is switched from watchdog timer to interval timer, or vice versa, while the WDT is
operating, correct operation cannot be guaranteed. Software must stop the watchdog timer (by
clearing the TME bit to 0) before switching the mode.