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(2) Interval timer mode
Interrupt requests are generated at the preset time intervals.
Interval Time
11
2
1/f
XX
12
2
1/f
XX
13
2
1/f
XX
14
2
1/f
XX
15
2
1/f
XX
16
2
1/f
XX
17
2
1/f
XX
19
2
1/f
XX
Remarks 1. f
XX
2. f
X
3. MCS : Bit 0 of oscillation mode selection register (OSMS)
4. Figures in parentheses apply to operation with f
246
CHAPTER 11 WATCHDOG TIMER
Table 11-2. Interval Times
MCS = 1
11
2
1/f
(410 s)
X
12
2
1/f
(819 s)
X
13
2
1/f
(1.64 ms)
X
14
2
1/f
(3.28 ms)
X
15
2
1/f
(6.55 ms)
X
16
2
1/f
(13.1 ms)
X
17
2
1/f
(26.2 ms)
X
19
2
1/f
(104.9 ms)
X
: Main system clock frequency (f
: Main system clock oscillation frequency
CS = 0
12
2
1/f
(819 s)
X
13
2
1/f
(1.64 ms)
X
14
2
1/f
(3.28 ms)
X
15
2
1/f
(6.55 ms)
X
16
2
1/f
(13.1 ms)
X
17
2
1/f
(26.2 ms)
X
18
2
1/f
(52.4 ms)
X
20
2
1/f
(209.7 ms)
X
or f
/2)
X
X
= 5.0 MHz.
X
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