Datasheet
38
[Not recommended for new designs - Use XMEGA A1U series] XMEGA A1 [DATASHEET]
8067O–AVR–06/2013
17. AWeX - Advanced Waveform Extension
17.1 Features
Output with complementary output from each Capture channel
Four Dead Time Insertion (DTI) Units, one for each Capture channel
8-bit DTI Resolution
Separate High and Low Side Dead-Time Setting
Double Buffered Dead-Time
Event Controlled Fault Protection
Single Channel Multiple Output Operation (for BLDC motor control)
Double Buffered Pattern Generation
17.2 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 generate a synchronized 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 on the port it is connected to. In addition,
the WG output from 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 ensures predictable and instant fault reaction, and gives great flexibility in the
selection of fault triggers.
The AWeX is available for TCC0 and TCE0. The notation of these are AWEXC and AWEXE.