Chapter 3
Interrupts
III - 48 External Interrupts
Setting example of NF
The following example shows how to select the positive edge triggered IRQ0 at P10 and enable NF of IRQ0.
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NF setting must be finished before enabling the interrupt.
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Step Settings Register Description
1
Set P10 as IRQ0 pin IRQIEN
IRQISEL0
Set IRQIEN.IRQ0EN to "1".
Set IRQISEL0.IRQ0SEL to "0".
* Set P10 as the IRQ0 pin.
2
Select the positive edge triggered
IRQ0
IRQ0ICR Set IRQ0ICR.REDG0 to "1".
3 Activate NF of IRQ0 NFCTR01 Set NFCTR01.NF0EN to "1".
4
Set the Interrupt level of IRQ0 IRQ0ICR Set IRQ0ICR.LV1-0 as you like.
* IRQ0ICR.IR should be set to "0".
5 Enable IRQ0 IRQ0ICR Set IRQ0ICR.IE to "1".
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