23.2 Features
- Up to four 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 pin Debouncing
- Interrupt on High or Low Levels
- Asynchronous Interrupts for Sleep Modes Without Clock
- Filtering of External Pins
- Event Generation from EXTINTx