ATTINY817-MFR. datasheet(97/492 Pages) MICROCHIP

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14.3.2.3 Event Generators

Each Event channel can receive the Events from several Event generators. For details on Event

generation, refer to the documentation of the corresponding peripheral.

For each Event channel, there are several possible Event generators, only one of which can be selected

at a time. The Event generator trigger is selected for each channel by writing to the respective channel

registers (EVSYS.ASYNCCHn, EVSYS.SYNCCHn). By default, the channels are not connected to any

Event generator.

14.3.2.4 Software Event

In a Software Event, the CPU will “strobe” an Event channel by inverting the current value for one system

clock cycle.

A Software Event is triggered on a channel by writing a '1' to the respective Strobe bit in the appropriate

Channel Strobe register:

•

Software Events on asynchronous channel l are initiated by writing a '1' to the ASYNCSTROBE[l]

bit in the Asynchronous Channel Strobe register (EVSYS.ASYNCSTROBE).

•

Software Events on synchronous channel k are initiated by writing a '1' to the SYNCSTROBE[k] bit

in the Synchronous Channel Strobe register (EVSYS.SYNCSTROBE).

Software Events are no different to those produced by Event generator peripherals with respect to Event

users: when the bit is written to '1', an Event will be generated on the respective channel, and received

and processed by the Event User.

14.3.3

Interrupts

Not applicable.

14.3.4

Sleep Mode Operation

When configured, the Event System will work in all sleep modes. One exception are software Events

which require a system clock.

14.3.5

Debug Operation

This peripheral is unaffected by entering debug mode.

ATTINY817-MFR. Datasheet(PDF) 97 Page - Microchip Technology