The block diagram shows the operation of an event channel. A multiplexer controlled by EVSYS.CHANNELn at the input selects which of the event sources to route onto the event channel. Each event channel has two subchannels; One asynchronous subchannel and one synchronous subchannel. A synchronous user will listen to the synchronous subchannel, an asynchronous user will listen to the asynchronous subchannel.
An event signal from an asynchronous source will be synchronized by the event system before being routed to the synchronous subchannel. An asynchronous event signal to be used by a synchronous consumer must last for at least one peripheral clock cycle to guarantee that it will propagate through the synchronizer. The synchronizer will delay such an event by 2-3 clock cycles depending on when the event occurs.
