Both Edges Triggered Interrupt - Panasonic MN101L Series User Manual

Chapter 3
Interrupts
3.3.3

Both edges triggered Interrupt

Both edges (rising edge and falling edge) interrupt can be specified with the EDGDT.
Setting example of both edges interrupt
The following example shows how to select the both edges triggered IRQ0 at P10.
Step
Set P10 as IRQ0 pin
1
2 Select the both edges triggered IRQ0
Set the Interrupt level of IRQ0
3
4 Enable IRQ0
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".
..
..
III - 46 External Interrupts
Settings Register
IRQIEN Set IRQIEN.IRQ0EN to "1".
IRQISEL0 Set IRQISEL0.IRQ0SEL to "0".
* Set P10 as the IRQ0 pin.
EDGDT Set EDGDT.EDGDT0 to "1".
IRQ0ICR Set IRQ0ICR.LV1-0 as you like.
* IRQ0ICR.IR should be set to "0".
IRQ0ICR Set the IRQ0ICR.IE to "1".
Description