Datasheet

19. 8-bit Timer/Counter0 (TC0) with PWM

19.1 Features

• Two Independent Output Compare Units

• Double Buffered Output Compare Registers

• Clear Timer on Compare Match (Auto Reload)

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

• Variable PWM Period

• Frequency Generator

• Three Independent Interrupt Sources (TOV0, OCF0A, and OCF0B)

19.2 Overview

Timer/Counter0 (TC0) is a general purpose 8-bit timer/counter module, with two independent output

compare units, and PWM support. It allows accurate program execution timing (event management) and

wave generation.

A simplified block diagram of the 8-bit timer/counter is shown below. CPU accessible I/O registers,

including I/O bits and I/O pins, are shown in bold. The device specific I/O register and bit locations are

listed in the register description. For the actual placement of I/O pins, refer to the pinout diagram.

The TC0 is enabled by writing the PRTIM0 bit in ”Minimizing Power Consumption” to '0'.

The TC0 is enabled when the PRTIM0 bit in the Power Reduction Register (PRR.PRTIM0) is written to

'1'.

ATmega48PA/88PA/168PA

8-bit Timer/Counter0 (TC0) with PWM

Datasheet Complete

DS40002011A-page 136