9.8.1 Quick Start Guide for EXTINT - Basic

The supported board list:

  • SAM D20 Xplained Pro

  • SAM D21 Xplained Pro

  • SAM R21 Xplained Pro

  • SAM L21 Xplained Pro

  • SAM L22 Xplained Pro

  • SAM DA1 Xplained Pro

  • SAM C21 Xplained Pro

In this use case, the EXTINT module is configured for:

  • External interrupt channel connected to the board LED is used

  • External interrupt channel is configured to detect both input signal edges

This use case configures a physical I/O pin of the device so that it is routed to a logical External Interrupt Controller channel to detect rising and falling edges of the incoming signal.

When the board button is pressed, the board LED will light up. When the board button is released, the LED will turn off.