25.2 Features
- Up to 16 external pins (EXTINTx), plus one non-maskable pin (NMI)
- Dedicated, individually maskable interrupt for each pin
- Interrupt on rising, falling, or both edges
- Synchronous or asynchronous edge detection mode
- Interrupt on high or low levels
- Asynchronous interrupts for sleep modes without clock
- Filtering of external pins
- Event generation from EXTINTx