276
CHAPTER 12 WATCHDOG TIMER
(2) Interval timer mode
Interrupt requests are generated at the preset time intervals.
Table 12-2. Interval Times
Interval Time
MCS = 1
MCS = 0
2
11
x 1/f
XX
2
11
x 1/f
X
(410
µ
s)
2
12
x 1/f
X
(819
µ
s)
2
12
x 1/f
XX
2
12
x 1/f
X
(819
µ
s)
2
13
x 1/f
X
(1.64 ms)
2
13
x 1/f
XX
2
13
x 1/f
X
(1.64 ms)
2
14
x 1/f
X
(3.28 ms)
2
14
x 1/f
XX
2
14
x 1/f
X
(3.28 ms)
2
15
x 1/f
X
(6.55 ms)
2
15
x 1/f
XX
2
15
x 1/f
X
(6.55 ms)
2
16
x 1/f
X
(13.1 ms)
2
16
x 1/f
XX
2
16
x 1/f
X
(13.1 ms)
2
17
x 1/f
X
(26.2 ms)
2
17
x 1/f
XX
2
17
x 1/f
X
(26.2 ms)
2
18
x 1/f
X
(52.4 ms)
2
19
x 1/f
XX
2
19
x 1/f
X
(104.9 ms)
2
20
x 1/f
X
(209.7 ms)
Remarks 1. f
XX
: Main system clock frequency (f
X
or f
X
/2)
2. f
X
: Main system clock oscillation frequency
3. MCS : Bit 0 of oscillation mode selection register (OSMS)
4. Figures in parentheses apply to operation with f
X
= 5.0 MHz.
Summary of Contents for PD78076
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