NEC PD78F9488 - Manual (Page 168)

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
WDCS2 WDCS1 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