Rising (Falling) Edge Triggered Interrupt - Panasonic MN101L Series User Manual

3.3.2

Rising (Falling) edge triggered interrupt

Rising or falling edge interrupt can be selected with IRQ0ICR, IRQ1ICR, IRQ2ICR, IRQ3ICR, IRQ4ICR,
IRQ5ICR and IRQ6ICR.
Setting example of rising edge triggered interrupt
The following example shows how to enable the rising edge triggered IRQ4 at P72.
Step Settings
Set P72 as IRQ4 pin
1
Select the rising edge triggered
2
IRQ4
Set the Interrupt level of IRQ4
3
4 Enable IRQ4
Interrupt edge (rising edge, falling edge or both edges (rising edge and falling edge)) of IRQn
must be changed when IRQnICR.IE is "0". After the interrupt edge is changed, IRQnICR.IR
must be cleared before setting IRQnICR.IE is "1".
..
..
Register
IRQIEN Set IRQIEN.IRQ4EN to "1".
IRQISEL0 Set IRQISEL0.IRQ4SEL to "1".
IRQISEL1 Set IRQISEL1.IRQ4CSEL to "0".
IRQ4ICR Set IRQ4ICR.REDG to "1".
IRQ4ICR Set IRQ4ICR.LV1-0 as you like.
* IRQ4ICR.IR should be set to "0".
IRQ4ICR Set IRQ4ICR.IE to "1".
Description
External Interrupts
Chapter 3
Interrupts
III - 45