Fig. 2.2.1 Int0 Interrupt Operation Example - Renesas 4513 User Manual

(6) Timer 4 interrupt
Constant period interrupts by a setting value to timer 4 can be used.
Outline: The constant period interrupts by the timer 4 underflow signal can be used.
Specifications: Prescaler, timer 3 and timer 4 divide the system clock frequency f(X
Figure 2.2.8 shows a setting example of the timer 4 constant period interrupt.
P3 /INT0
0
"H"
P3 /INT0
0
"L"

Fig. 2.2.1 INT0 interrupt operation example

and the timer 4 interrupt occurs every 250 ms.
"H"
"L"
4513/4514 Group User's Manual
An interrupt occurs after the valid waveform "falling" is detected.
An interrupt occurs after the valid waveform "rising" is detected.
APPLICATION
2.2 Interrupts
) = 4.0 MHz,
IN
2-17