AON Event Fabric ORs 6 programmable
events together to generate a single NMI (Non-maskable interrupt) from AON
peripherals, configurable with the EVTULL.NMISEL register.
The 6 AON events are also exported
separately as a bus to MCU Event Fabric and can be used as publishers within MCU
peripherals.
Note: Since the events from AON are
double synchronized within MCU event fabric before being used as publishers, care
must be taken to make sure that when the AON events are cleared, a subsequent event
does not get set immediately (within two CLKSVT clock cycles). This is so that a new
rising edge is generated for the second event. Otherwise the second event can get
missed if the cleared AON event pulse does not get synchronized within MCU event
fabric before getting set again.