Datasheet

22. 8-bit Timer/Counter2 (TC2) with PWM and Asynchronous Operation

22.1 Features

• Channel Counter

• Clear Timer on Compare Match (Auto Reload)

• Glitch-free, Phase Correct Pulse-Width Modulator (PWM)

• Frequency Generator

• 10-bit Clock Prescaler

• Overflow and Compare Match Interrupt Sources (TOV2, OCF2A, and OCF2B)

• Allows Clocking from External 32 kHz Watch Crystal Independent of the I/O Clock

22.2 Overview

Timer/Counter2 (TC2) is a general purpose, channel, 8-bit timer/counter module.

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

diagram.

The TC2 is enabled when the PRTIM2 bit in the Power Reduction Register (PRR.PRTIM2) is written to

'1'.

ATmega48PA/88PA/168PA

8-bit Timer/Counter2 (TC2) with PWM and A...

Datasheet Complete

DS40002011A-page 199