Datasheet

36XMEGA E5 [DATASHEET]

Atmel-8153H–AVR-ATxmega8E5-ATxmega16E5-ATxmega32E5_Datasheet–07/2014

18. WeX – Waveform Extension

18.1 Features

z Module for more customized and advanced waveform generation

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

z Output matrix for timer/counter waveform output distribution

z Configurable distribution of compare channel output across port pins

z Redistribution of dead-time insertion resource between TC4 and TC5.

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

z Complementary high and low side with non overlapping outputs

z Separate dead-time setting for high and low side

z 8-bit resolution

z Four swap (SWAP) units

z Separate port pair or low high side drivers swap

z Double buffered swap feature

z Pattern generation creating synchronized bit pattern across the port pins

z 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

primarily 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.

SWAP1DTI1

Pattern Generator

Output Matrix

WEX

Px7

Px6

Px5

Px4

Px3

Px2

Px1

Px0

Fault

Unit 5

Fault

Unit 4

T/C4

T/C5

OUTOVDIS

HIRES