ATtiny261-ESSZ datasheet(92/227 Pages) ATMEL

92 / 227 page

7753C–AVR–07/09

ATtiny261/ATtiny461/ATtiny861

16. Timer/Counter1

16.1

Features

• 10/8-Bit Accuracy

• Three Independent Output Compare Units

• Clear Timer on Compare Match (Auto Reload)

• Glitch Free, Phase and Frequency Correct Pulse Width Modulator (PWM)

• Variable PWM Period

• Independent Dead Time Generators for each PWM channels

• Five Independent Interrupt Sources (TOV1, OCF1A, OCD1B, OCF1D, FPF1)

• High Speed Asynchronous and Synchronous Clocking Modes

• Separate Prescaler Unit

16.2

Overview

Timer/Counter1 is a general purpose high speed Timer/Counter module, with three independent

Output Compare Units, and with PWM support.

The Timer/Counter1 features a high resolution and a high accuracy usage with the lower pres-

caling opportunities. It can also support three accurate and high speed Pulse Width Modulators

using clock speeds up to 64 MHz. In PWM mode Timer/Counter1 and the output compare regis-

ters serve as triple stand-alone PWMs with non-overlapping non-inverted and inverted outputs.

Similarly, the high prescaling opportunities make this unit useful for lower speed functions or

exact timing functions with infrequent actions. A simplified block diagram of the Timer/Counter1

is shown in F i gure 16-1 . For a c tual p l aceme n t of the I/O pins, refer to “Pinout

ATtiny261/461/861” on page 2. The device-specific I/O register and bit locations are listed in the

“Register Description” on page 115.

ATtiny261-ESSZ Datasheet(PDF) 92 Page - ATMEL Corporation