CHAPTER 14 PORT FUNCTIONS
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User’s Manual U14492EJ3V0UD
Figure 14-14. Example of Noise Elimination Timing
Noise elimination clock
Input signal
Internal signal
Timers 1 to 3 rising
edge detection
Timers 1 to 3 falling
edge detection
2 clocks 2 clocks
5 clocks
5 clocks
4 clocks
4 clocks
3 clocks
3 clocks
Caution
If there are three or less noise elimination clocks while the timers 1 to 3 input signals
are high level (or low level), the input pulse is eliminated as noise. If it is sampled at
least four times, the edge is detected as valid input.
