CHAPTER 8 WATCHDOG TIMER
User’s Manual U18172EJ2V0UD
143
Figure 8-4. Status Transition Diagram When “Low-Speed Internal Oscillator Cannot Be Stopped”
Is Selected by Option Byte
Reset
WDT clock: f
RL
Overflow time: 546.13 ms (MAX.)
STOP
WDT count continues.
HALT
WDT count continues.
STOP instruction
HALT instruction
WDT clock is fixed to f
RL
.
Select overflow time (settable only once).
WDT clock: f
RL
Overflow time: 4.27 ms to 546.13 ms (MAX.)
WDT count continues.
Interrupt
Interrupt
WDTE = “ACH”
Clear WDT counter.