ATTINY817-MFR. datasheet(93/492 Pages) MICROCHIP

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14.

EVSYS - Event System

14.1

Features

•

System for direct peripheral-to-peripheral signaling

•

Peripherals can directly produce, use, and react to peripheral events

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Short and guaranteed response time

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Up to six parallel Event channels available; 4 asynchronous- and 2 synchronous

•

Channels can be configured to have one triggering peripheral action and multiple peripheral users

•

Peripherals can directly trigger and react to Events from other peripherals

•

Events can be sent and/or received by most peripherals, and by software

•

Works in active mode and standby sleep mode

14.2

Overview

The Event System (EVSYS) enables direct peripheral-to-peripheral signaling. It allows a change in one

peripheral (the Event Generator) to trigger actions in other peripherals (the Event Users) through Event

channels, without using the CPU. It is designed to provide short and predictable response times between

peripherals, allowing for autonomous peripheral control and interaction, and also for synchronized timing

of actions in several peripheral modules. It is thus a powerful tool for reducing the complexity, size, and

execution time of the software.

A change of the Event Generator's state is referred to as an Event, and usually corresponds to one of the

peripheral's interrupt conditions. Events can be directly forwarded to other peripherals using the

dedicated Event routing network. The routing of each channel is configured in software, including event

generation and use.

Only one trigger from an Event generator peripheral can be routed on each channel, but multiple

channels can use the same generator source. Multiple peripherals can use events from the same

channel.

A channel path can be either asynchronous or synchronous to the main clock. The mode must be

selected based on the requirements of the application.

The Event System can directly connect analog and digital converters, analog comparators, I/O port pins,

the real-time counter, timer/counters, and the configurable custom logic peripheral. Events can also be

generated from software and the peripheral clock.

ATtiny417/817

Datasheet Complete

DS40001901B-page 93

ATTINY817-MFR. Datasheet(PDF) 93 Page - Microchip Technology

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