ATTINY817-MFR. datasheet(96/492 Pages) MICROCHIP

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14.2.3.2 I/O Lines

The EVSYS can output three event channels asynchronously on pins. The output signals are called

EVOUT[2:0].

Configure which event channel (one of SYNCCH[1:0] or ASYNCCH[3:0]) is output on which the

EVOUTn by writing to EVSYS.ASYNCUSER10, EVSYS.ASYNCUSER9 or EVSYS.ASYNCUSER8

respectively.

Optional: configure the pin properties using the PORT peripheral.

Enable the pin output by writing '1' to the respective EVOUTn bit in the Control A register of the

PORTMUX peripheral (PORTMUX.CTRLA).

Related Links

Event User Multiplexer Setup

Event System Channel

14.3.2

Operation

14.3.2.1 Event User Multiplexer Setup

The Event User multiplexer selects the channel for an Event User. Each Event User has one dedicated

Event User multiplexer. Each multiplexer is connected to the supported Event channel outputs, and can

be configured to select one of these channels.

Event Users which support asynchronous Events also support synchronous Events. There are also Event

Users that support only synchronous Events.

The Event User multiplexers are configured by writing to the corresponding registers:

•

Event Users supporting both synchronous and asynchronous Events are configured by writing to

the respective asynchronous User Channel Input Selection n register (EVSYS.ASYNCUSERn).

•

The users of synchronous-only Events are configured by writing to the respective Synchronous

User Channel Input Selection n register (EVSYS.SYNCUSERn).

Default setup of all user multiplexers is Off.

14.3.2.2 Event System Channel

An Event channel can be connected to one of the Event generators. Event channels either support

asynchronous generators or synchronous generators.

The source for each asynchronous Event channel is configured by writing to the respective Asynchronous

Channel n Input Selection register (EVSYS.ASYNCCHn).

The source for each synchronous Event channel is configured by writing to the respective Synchronous

Channel n Input Selection register (EVSYS.SYNCCHn).

ATtiny417/817

Datasheet Complete

DS40001901B-page 96

ATTINY817-MFR. Datasheet(PDF) 96 Page - Microchip Technology