Edge Detection

When synchronous or resynchronized paths are used, edge detection must be used. The event system can perform edge detection in three different ways:

• Generate an event only on the rising edge
• Generate an event only on the falling edge
• Generate an event on rising and falling edges

Edge detection is selected by writing to the Edge Selection bit group in the Channel register (CHANNEL.EDGSEL).

If the generator event is a pulse, both edges cannot be selected. Use the rising edge or falling edge detection methods, depending on the generator event default level.