ATXMEGA8E5 datasheet(42/153 Pages) MICROCHIP

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Data Sheet Complete

DS40002059A-page 42

ATxmega32E5/16E5/8E5

18. WeX – Waveform Extension

18.1 Features



Module for more customized and advanced waveform generation



Optimized for various type of motor, ballast, and power stage control



Output matrix for timer/counter waveform output distribution



Configurable distribution of compare channel output across port pins



Redistribution of dead-time insertion resource between TC4 and TC5



Four dead-time insertion (DTI) units, each with



Complementary high and low side with non overlapping outputs



Separate dead-time setting for high and low side



8-bit resolution



Four swap (SWAP) units



Separate port pair or low high side drivers swap



Double buffered swap feature



Pattern generation creating synchronized bit pattern across the port pins



Double buffered pattern generation

18.2 Overview

The waveform extension (WEX) provides extra functions to the timer/counter in waveform generation (WG) modes. It is pri-

marily intended for motor control, ballast, LED, H-bridge, power converters, and other types of power control applications.

The WEX consist of five independent and successive units, as shown in Figure 18-1.

Figure 18-1. Waveform Extension and Closely Related Peripherals

The output matrix (OTMX) can distribute and route out the waveform outputs from timer/counter 4 and 5 across the port

pins in different configurations, each optimized for different application types. The dead time insertion (DTI) unit splits the

four lower OTMX outputs into a two non-overlapping signals, the non-inverted low side (LS) and inverted high side (HS) of

the waveform output with optional dead-time insertion between LS and HS switching.

The swap (SWAP) unit can swap the LS and HS pin position. This can be used for fast decay motor control. The pattern

generation unit generates synchronized output waveform with constant logic level. This can be used for easy stepper motor

and full bridge control.

SWAP1

DTI1

SWAP1

DTI1

SWAP1

DTI1

SWAP1

DTI1

WEX

Px7

Px6

Px5

Px4

Px3

Px2

Px1

Px0

Fault

Unit 5

Fault

Unit 4

T/C4

T/C5

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