30.6.2.8 Event Latency

An event from an event generator is propagated to an event user with different latency, depending on event channel configuration.

• Asynchronous Path: The maximum routing latency of an external event is related to the internal signal routing and it is device dependent.
• Synchronous Path: The maximum routing latency of an external event is one GCLK_EVSYS_CHANNEL_n clock cycle.
• Resynchronized Path: The maximum routing latency of an external event is three GCLK_EVSYS_CHANNEL_n clock cycles.

The maximum propagation latency of a user event to the peripheral clock core domain is three peripheral clock cycles.

The event generators, event channel and event user clocks ratio must be selected in relation with the internal event latency constraints. Events propagation or event actions in peripherals may be lost if the clock setup violates the internal latencies.