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User’s Manual U15798EJ2V0UD
CHAPTER 10 WATCHDOG TIMER
10.1 Outline of Watchdog Timer
The watchdog timer can also be used to generate a non-maskable interrupt request, maskable interrupt request,
or RESET signal at the preset time intervals.
10.2 Watchdog Timer Functions
The watchdog timer has the following functions.
• Watchdog timer
• Interval timer
• Oscillation stabilization time selection
Caution Select the watchdog timer mode or the interval timer mode with the watchdog timer mode register
(WDTM). (The watchdog timer and the interval timer cannot be used simultaneously.)
Figure 10-1 shows a block diagram of the watchdog timer.
Figure 10-1. Watchdog Timer Block Diagram
f
X
/2
8
RUN
Clock
input
controller
INTWDT
RESET
WDT mode signal
3
OSTS2 OSTS1 OSTS0
WDCS2 WDCS1 WDCS0
RUN WDTM4
Internal bus
Divider
Divided
clock
selector
Output
controller
Division
mode selector
WDTM3
Oscillation stabilization
time select register
(OSTS)
Watchdog timer
clock select
register (WDCS)
Watchdog timer
mode register
(WDTM)
f
X
Содержание mPD780344 Series
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