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(2) External event counter
The number of pulses of an externally input signal can be measured.
(3) Square-wave output
A square wave with any selected frequency can be output.
Remarks 1. f
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CHAPTER 9 8-BIT TIMER/EVENT COUNTER
Table 9-2. 8-Bit Timer/Event Counter Square-Wave Output Ranges
Minimum Pulse Width
× 1/f
2
2
(400 ns)
X
× 1/f
3
2
(800 ns)
X
× 1/f
(1.6 µ s)
4
2
X
(3.2 µ s)
× 1/f
2
5
X
× 1/f
(6.4 µ s)
6
2
X
× 1/f
(12.8 µ s)
2
7
X
(25.6 µ s)
× 1/f
2
8
X
× 1/f
(51.2 µ s)
9
2
X
× 1/f
(102.4 µ s)
2
10
X
(409.6 µ s)
× 1/f
2
12
X
: Main system clock oscillation frequency
X
2. Values in parentheses apply to operation with f
Maximum Pulse Width
(102.4 µ s)
× 1/f
2
10
2
2
X
× 1/f
(204.8 µ s)
11
3
2
2
X
× 1/f
(409.6 µ s)
12
4
2
2
X
(819.2 µ s)
× 1/f
2
13
2
5
X
× 1/f
14
6
2
(1.64 ms)
2
X
× 1/f
2
15
(3.28 ms)
2
7
X
× 1/f
2
16
(6.55 ms)
2
8
X
× 1/f
17
9
2
(13.1 ms)
2
X
× 1/f
2
18
(26.2 ms)
2
10
X
× 1/f
2
20
(104.9 ms)
2
12
X
= 10.0 MHz.
X
Resolution
× 1/f
(400 ns)
X
× 1/f
(800 ns)
X
× 1/f
(1.6 µ s)
X
(3.2 µ s)
× 1/f
X
× 1/f
(6.4 µ s)
X
× 1/f
(12.8 µ s)
X
(25.6 µ s)
× 1/f
X
× 1/f
(51.2 µ s)
X
× 1/f
(102.4 µ s)
X
(409.6 µ s)
× 1/f
X
201
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