30.5.2.12 Software Event
A software event can be initiated on a channel by writing a '1' to the Software Event bit in the Channel register (SWEVT.CHANNELn). Then the software event can be serviced as any event generator; i.e., when a bit is set to ‘1’, the corresponding event will be generated on the respective channel.
Note: Software Events are only supported in Asynchronous mode.