atxmega128a3-mu ATMEL Corporation, atxmega128a3-mu Datasheet - Page 12

• Manufacturer Part Number: atxmega128a3-mu
• Description: 8/16-bit Xmega Microcontroller
• Manufacturer: ATMEL Corporation

9. Event System
9.1
9.2
8068A–AVR–02/08
Features
Overview
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The Event System is a set of features for inter peripheral communication. It enables the possibil-
ity for a change of state in one peripheral to automatically trigger actions in other peripherals.
What change of state in a peripheral that will trigger actions in other peripherals is configurable
in software. It is a simple, but powerful system as it allows for autonomous control of peripherals
without any use of interrupt, CPU or DMA resources
The indication of a change of state in a peripheral is referred to as an event. The events are
passed between peripherals using a dedicated routing network called the Event Routing Net-
work.
Routing Network and the peripherals that are connected. The event system is not a single entity,
but a set of features for inter peripheral communication. This highly flexible system can be used
for simple rerouting of signals, pin functions or for sequencing of events.
The event system is functional in both Active- and Idle mode.
Inter peripheral communication and signalling
CPU and DMA independent operation
8 Event Channels allows for up to 8 signals to be routed at the same time
Events can be generated by
Events can be used by
Advanced Features
Operative in Active and Idle mode
– Timer/Counters (TCxn)
– Real Time Counter (RTC)
– Analog to Digital Converters (ADCx)
– Analog Comparators (ACx)
– Ports (PORTx)
– System Clock (Clk
– Software (CPU)
– TImer/Counters (TCxn)
– Analog to Digital Converters (ADCx)
– Digital to Analog Converters (DACx)
– Ports (PORTx)
– DMA Controller (DMAC)
– Manual Event Generation from software (CPU)
– Quadrature Decoding
– Digital Filtering
Figure 9-1 on page 13
SYS
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shows a basic block diagram of the Event System with the Event
ATxmega A3
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