CHAPTER 10 WATCHDOG TIMER
Preliminary User’s Manual U16315EJ1V0UD
211
10.2 Configuration of Watchdog Timer
The watchdog timer consists of following hardware.
Table 10-3. Configuration of Watchdog Timer
Item
Configuration
Control registers
Watchdog timer mode register (WDTM)
Watchdog timer enable register (WDTE)
Figure 10-1. Block Diagram of Watchdog Timer
f
R
/2
2
Clock
input
controller
Output
controller
WDTRES
(internal reset signal)
WDCS2
Internal bus
WDCS1 WDCS0
f
XP
/2
4
WDCS3
WDCS4
0
1
1
Selector
16-bit
counter
f
XP
/2
13
to
f
XP
/2
20
or
f
R
/2
11
to
f
R
/2
18
Watchdog timer enable
register (WDTE)
Watchdog timer mode
register (WDTM)
3
3
2
Clear
Mask option
(to set “Ring-OSC
cannot be stopped” or
“Ring-OSC can be
stopped by software”)
Содержание 78K0/KD1 Series
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