ATXMEGA128A4U-AU Datasheet, PDF (34/121 Pages) ATMEL Corporation – 8/16-bit Atmel XMEGA A4U Microcontroller

XMEGA A4U
17. AWeX - Advanced Waveform Extension
17.1 Features
17.2 Overview
• Wafeform output with complementary output from each Compare channel
• 4 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
– Optionally distribution of one Compare channel output across the port pins
• Event controlled Fault Protection for instant and predictably fault triggering
The Advanced Waveform Extension (AWeX) provides extra functions to the Timer/Counter in
Waveform Generation (WG) modes. It is primarily intended for 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 shutdown of drivers. It can also generate a syn-
chronized bit pattern across the port pins.
Each of the waveform generator outputs from the Timer/Counter 0 are split into a complimentary
pair of outputs when any AWeX features are enabled. These output pairs go through a Dead-
Time Insertion (DTI) unit that generates the non-inverted Low Side (LS) and inverted High Side
(HS) of the WG output with dead time insertion between LS and HS switching. The DTI output
will override the normal port value according to the port override setting.
The Pattern Generation unit can be used to generate a synchronized bit pattern across the port
it is connected to. In addition, the WG output from the Compare Channel A can be distributed to
and override all the port pins. When the Pattern Generator unit is enabled the DTI unit is
bypassed.
The Fault Protection unit is connected to the Event System, enabling any event to trigger a fault
condition that will disable the AWeX output. The Event System ensure predictable and instant
fault reaction, and gives great flexibility in the selection of fault triggers.
The AWEX is available for TCC0. The notation of this is AWEXC.
34
8387A–AVR–07/11