139
CHAPTER 11 WATCHDOG TIMER
11.1 Watchdog Timer Functions
The watchdog timer has the following functions.
• Watchdog timer
• Interval timer
Caution
Select the watchdog timer mode or the interval timer mode with the watchdog timer mode
register (WDTM).
Figure 11-1 shows the watchdog timer block diagram.
Figure 11-1. Watchdog Timer Block Diagram
Prescaler
INTWDT
Maskable
interrupt request
INTWDT
Non-maskable
interrupt request
RESET
WDTIF
WDTMK
RUN
Selector
Control circuit
f
X
/2
7
f
X
/2
12
f
X
/2
13
f
X
/2
14
f
X
/2
15
f
X
/2
16
f
X
/2
17
f
X
/2
18
f
X
/2
20
3
Internal bus
Internal bus
WDCS2 WDCS1 WDCS0
RUN WDTM4 WDTM3
Watchdog timer mode register (WDTM)
Watchdog timer clock
select register (WDCS)
Содержание mPD780973 Series
Страница 2: ...2 MEMO ...
Страница 66: ...66 MEMO ...
Страница 98: ...98 MEMO ...
Страница 138: ...138 MEMO ...
Страница 164: ...164 MEMO ...
Страница 182: ...182 MEMO ...
Страница 204: ...204 MEMO ...
Страница 244: ...244 MEMO ...
Страница 262: ...262 MEMO ...
Страница 278: ...278 MEMO ...
Страница 290: ...290 MEMO ...