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External Interrupts Window
The AVRMEGA has 23 interrupt sources, including 8 external interrupts (INT0..INT7). If this page
or the next page (Interrupts) are selected, an interrupt template will be generated even if no actual
interrupts are checked.
Interrupts INT0 to INT3 are always low leveled triggered on pin 25 to pin 28 (PD0..PD3). To
select an interrupt, check its box.
Interrupts INT4 to INT7 are triggered by changes on the interrupt pins (pin 6 to pin 9 - PE4..PE7).
The type of change that causes an interrupt can be set with the appropriate set of radio buttons.
These buttons are only enabled when the corresponding interrupt is checked.
