XMEGAD datasheet(45/309 Pages) ATMEL

45 / 309 page

8210B–AVR–04/10

XMEGA D

Figure 5-1.

Event System Overview and Connected Peripherals

The CPU is not part of the Event System, but it indicates that it is possible to manually generate

events from software or by using the on-chip debug system.

The Event System works in active and idle mode.

5.3

Events

In the context of the Event System, an indication that a change of state within a peripheral has

occurred is called an event. There are two main types of events: Signaling events and data

events. Signaling events only indicate a change of state while data events contain additional

information on the event.

The peripheral from where the event origin is called the Event Generator. Within each periph-

eral, for example a Timer/Counter, there can be several event sources, such as a timer compare

match or timer overflow. The peripheral using the event is called the Event User, and the action

that is triggered is called the Event Action.

Figure 5-2.

Example of event source, generator, user and action

AD Cx

E v e n t R outing

Ne tw o rk

PO R T x

CP U

AC x

RT C

T/C x n

IR C O M

Clk SYS

Event

Routing

Network

Compare Match

Over-/Underflow

Error

Timer/Counter

Channel Sweep

Single

Conversion

ADC

Event Generator

Event Source

Event User

Event Action

Event Action Selection

XMEGAD Datasheet(PDF) 45 Page - ATMEL Corporation

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