Atmel AVR XMEGA AU series User Manual

206
8331B–AVR–03/12
Atmel AVR XMEGA AU
16. AWeX – Advanced Waveform Extension
16.1 Features
• Waveform output with complementary output from each compare channel
• Four dead-time insertion (DTI) units
– 8-bit resolution
– Separate high and low side dead-time setting
– Double buffered dead time
– Optionally halts timer during dead-time insertion
• Pattern generation unit creating synchronised bit pattern across the port pins
– Double buffered pattern generation
– Optional distribution of one compare channel output across the port pins
• Event controlled fault protection for instant and predictable fault triggering
16.2 Overview
The advanced waveform extension (AWeX) provides extra functions to the timer/counter in
waveform generation (WG) modes. It is primarily intended for use with different types of motor
control and other power control applications. It enables low- and high side output with dead-time
insertion and fault protection for disabling and shutting down external drivers. It can also gener-
ate a synchronized bit pattern across the port pins.
Figure 16-1. Advanced waveform extention and closely related peripherals (grey).
As shown in Figure 16-1 on page 206, each of the waveform generator outputs from timer/coun-
ter 0 are split into a complimentary pair of outputs when any AWeX features are enabled. These
Timer/Counter 0
AWeX
WG
Channel A
DTI
Channel A
WG
Channel B
DTI
Channel B
WG
Channel C
DTI
Channel C
WG
Channel D
DTI
Channel D
Port
Override
Pattern
Generation
Px0
Px1
Px2
Px3
Px4
Px5
Px6
Px7
Event
System
Fault
Protection

Atmel AVR XMEGA AU series Specifications

General

Brand	Atmel
Model	AVR XMEGA AU series
Category	Microcontrollers
Language	English