10.7
Overview of Watchdog Timer
10.7.1
Block Diagram
Figure 10.2 shows a block diagram of the WDT.
Standby
release
Internal reset
request
Interrupt
request
WTCSR: Watchdog timer control/status register
WTCNT: Watchdog timer counter
Standby
control
Reset
control
Interrupt
control
WTCSR
Figure 10.2 Block Diagram of WDT
WDT
Frequency divider
Clock selection
Clock selector
Overflow
WTCNT
Bus interface
Standby
mode
Frequency
divider 2 ×1
clock
Clock
Rev. 6.0, 07/02, page 259 of 986