ATXMEGA8E5 datasheet(40/153 Pages) MICROCHIP

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Data Sheet Complete

DS40002059A-page 40

ATxmega32E5/16E5/8E5

17. Timer Counter Type 4 and 5

17.1 Features

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Three 16-bit timer/counter

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One timer/counter of type 4

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Two timer/counter of type 5

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32-bit timer/counter support by cascading two timer/counters

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Up to four compare or capture (CC) channels

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Four CC channels for timer/counters of type 4

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Two CC channels for timer/counters of type 5

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Double buffered timer period setting

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Double buffered CC channels

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Waveform generation modes:

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Frequency generation

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Single-slope pulse width modulation

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Dual-slope pulse width modulation

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Input capture:

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Input capture with noise cancelling

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Frequency capture

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Pulse width capture

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32-bit input capture

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Timer overflow and error interrupts/events

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One compare match or input capture interrupt/event per CC channel

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Can be used with event system for:

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Quadrature decoding

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Count and direction control

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Input capture

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Can be used with EDMA and to trigger EDMA transactions

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High-resolution extension

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Increases frequency and waveform resolution by 4x (2-bit) or 8x (3-bit)

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Waveform extension

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Low- and high-side output with programmable dead-time insertion (DTI)

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Fault extention

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Event controlled fault protection for safe disabling of drivers

17.2 Overview

AVR XMEGA devices have a set of flexible, 16-bit timer/counters (TC). Their capabilities include accurate program execu-

tion timing, frequency and waveform generation, and input capture with time and frequency measurement of digital signals.

Two timer/counters can be cascaded to create a 32-bit timer/counter with optional 32-bit input capture.

A timer/counter consists of a base counter and a set of compare or capture (CC) channels. The base counter can be used

to count clock cycles or events. It has direction control and period setting that can be used for timing. The CC channels can

be used together with the base counter to do compare match control, frequency generation, and pulse width modulation

(PWM) generation, as well as various input capture operations. A timer/counter can be configured for either capture, com-

pare, or capture and compare function.

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, input capture trigger, or to synchronize operations.

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