ATTINY817-MFR. datasheet(142/492 Pages) MICROCHIP

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20.

TCA - 16-bit Timer/Counter Type A

20.1

Features

•

16-bit timer/counter

•

Three compare channels

•

Double buffered timer period setting

•

Double buffered compare channels

•

Waveform generation:

–

Frequency generation

–

Single-slope PWM (pulse width modulation)

–

Dual-slope PWM

•

Count on event

•

Timer overflow interrupts/events

•

One compare match per compare channel

•

Two 8-bit timer/counters in Split Mode

20.2

Overview

The flexible 16-bit PWM Timer/Counter type A (TCA) provides accurate program execution timing,

frequency and waveform generation, and command execution.

A TCA consists of a base counter and a set of compare channels. The base counter can be used to count

clock cycles or events, or let events control how it counts clock cycles. It has direction control and period

setting that can be used for timing. The compare channels can be used together with the base counter to

do compare match control, frequency generation, and pulse width waveform modulation.

Depending on the mode of operation, the counter is cleared, reloaded, incremented, or decremented at

each timer/counter clock or event input.

A timer/counter can be clocked and timed from the peripheral clock with optional prescaling or from the

event system. The event system can also be used for direction control or to synchronize operations.

By default, the TCA is a 16-bit timer/counter. The timer/Counter has a Split mode feature that splits it into

two 8-bit timer/counters with three compare channels each.

A block diagram of the 16-bit timer/counter with closely related peripheral modules (in grey) is shown

below.

ATtiny417/817

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DS40001901B-page 142

ATTINY817-MFR. Datasheet(PDF) 142 Page - Microchip Technology

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