UPD78361A Datasheet, PDF (42/88 Pages) NEC – 16/8-BIT SINGLE-CHIP MICROCONTROLLER

µPD78361A, 78362A
3.11 WATCHDOG TIMER (WDT)
The watchdog timer is a free running timer equipped with a non-maskable interrupt function to prevent
program hang-up or deadlock. An error of the program can be seen by the occurrence of the overflow interrupt
(INTWDT) of the watchdog timer.
Figure 3-19. Block Diagram of Watchdog Timer
fCLK/2⁹
f CLK/2¹¹
f CLK/2¹³
WDT CLR
WDT STOP
Watchdog timer
(8 bits)
Overflow
Clear
INTWDT
Oscillation
stabilization
time control circuit
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