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After reset: 00H
WTM
WTM7
WTM7
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
WTM7
0
0
0
0
1
1
1
1
WTM1
0
1
WTM0
0
1
Caution Rewrite the WTM2 to WTM7 bits while both the WTM0 and WTM1 bits are 0.
Remarks 1. f
: Watch timer clock frequency
W
2. Values in parentheses apply when f
CHAPTER 10 INTERVAL TIMER, WATCH TIMER
R/W
Address: FFFFF680H
WTM6
WTM5
WTM4
WTM6
WTM5
WTM4
Selection of interval timer interrupt (INTWTI) time
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
WTM3
WTM2
Selection of watch timer interrupt (INTWT) time
14
0
0
2
/f
(0.5 s: f
W
13
0
1
2
/f
(0.25 s: f
W
5
1
0
2
/f
(977 s: f
W
4
1
1
2
/f
(488 s: f
W
14
0
0
2
/f
(0.5 s: f
W
0
1
13
2
/f
(0.25 s: f
W
5
1
0
2
/f
(977 s: f
W
4
1
1
2
/f
(488 s: f
W
Control of 5-bit counter operation
Clear after operation stops
Start
Watch timer operation enable
Stop operation (clear both prescaler and 5-bit counter)
Enable operation
= 32.768 kHz
W
User's Manual U16896EJ2V0UD
< >
WTM3
WTM2
WTM1
μ
4
2
/f
(488 s: f
= f
)
W
W
XT
μ
5
2
/f
(977 s: f
= f
)
W
W
XT
6
2
/f
(1.95 ms: f
= f
)
W
W
XT
7
2
/f
(3.91 ms: f
= f
)
W
W
XT
8
2
/f
(7.81 ms: f
= f
)
W
W
XT
9
2
/f
(15.6 ms: f
= f
)
W
W
XT
10
2
/f
(31.3 ms: f
= f
)
W
W
XT
11
2
/f
(62.5 ms: f
= f
)
W
W
XT
μ
4
2
/f
(488 s: f
= f
)
W
W
BRG
μ
5
2
/f
(977 s: f
= f
)
W
W
BRG
6
2
/f
(1.95 ms: f
= f
)
W
W
BRG
7
2
/f
(3.91 ms: f
= f
)
W
W
BRG
8
2
/f
(7.81 ms: f
= f
)
W
W
BRG
9
2
/f
(15.6 ms: f
= f
)
W
W
BRG
10
2
/f
(31.3 ms: f
= f
)
W
W
BRG
11
2
/f
(62.5 ms: f
= f
)
W
W
BRG
= f
)
W
XT
= f
)
W
XT
μ
= f
)
W
XT
μ
= f
)
W
XT
= f
)
W
BRG
= f
)
W
BRG
μ
= f
)
W
BRG
μ
= f
)
W
BRG
< >
WTM0
343
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