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CHAPTER 18 INTERRUPT FUNCTIONS AND TEST FUNCTION
457
When the sampling INTP0 input level is active twice in succession, the noise eliminator sets the interrupt request
flag (PIF0) to 1. Figure18-7 shows noise eliminator input/output timing.
Figure 18-7. Noise Eliminator Input/Output Timing (when rising edge is detected)
(a) When input is less than the sampling cycle (t
SMP
)
(b) When input is equal to or twice the sampling cycle (t
SMP
)
(c) When input is twice or more than the sampling cycle (t
SMP
)
t
SMP
INTP0
PIF0
Sampling Clock
“L”
Because INTP0 level is not high level in sampling,
PIF0 output remains at low level.
Sampling Clock
INTP0
PIF0
<1>
<2>
Because sampling INTP0 level is high level twice in succession in <2>,
PIF0 flag is set to 1.
t
SMP
t
SMP
INTP0
PIF0
Sampling Clock
When INTP0 level is high level twice in succession,
PIF0 flag is set to 1.
Содержание 78014Y Series
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