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CHAPTER 8 WATCHDOG TIMER
User’s Manual U15104EJ2V0UD
(1) Watchdog timer clock select register (WDCS)
This register sets the watchdog timer and overflow time of the interval timer.
WDCS is set with a 1-bit or 8-bit memory manipulation instruction.
Reset input clears WDCS to 00H.
Figure 8-2. Format of Watchdog Timer Clock Select Register (WDCS)
Remarks 1. f
X
: System clock oscillation frequency
2. ( ): f
X
= 4.5 MHz
0
7
0
6
0
0
4
0
3
2
1
0
FF42H
Address
WDCS
Symbol
WDCS2 WDCS1 WDCS0
5
00H
After reset
R/W
R/W
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
WDCS2 WDCS1 WDCS0
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
/f
X
Watchdog timer/interval timer overflow time
(910 s)
(1.82 ms)
(3.64 ms)
(7.28 ms)
(14.6 ms)
(29.1 ms)
(58.3 ms)
(233 ms)
µ
Содержание mPD178053
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