CHAPTER 9 WATCHDOG TIMER
168 User’s Manual U15331EJ4V1UD
9.2 Watchdog Timer Configuration
The watchdog timer includes the following hardware.
Table 9-3. Configuration of Watchdog Timer
Item Configuration
Control registers Watchdog timer clock selection register (WDCS)
Watchdog timer mode register (WDTM)
Figure 9-1. Block Diagram of Watchdog Timer
Internal bus
Internal bus
Prescaler
Selector
Controller
f
X
2
6
f
X
2
8
f
X
2
10
3
7-bit counter
WDTIF
WDTMK
WDCS2WDCS1 WDCS0
Watchdog timer clock selection register
(WDCS) Watchdog timer mode register (WDTM)
Clear
WDTM4
RUN
WDTM3
INTWDT
Maskable
interrupt request
RESET
INTWDT
Non-maskable
interrupt request
f
X
2
4