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8331B–AVR–03/12
Atmel AVR XMEGA AU
1.
About the Manual
This document contains in-depth documentation of all peripherals and modules available for the
Atmel AVR XMEGA AU microcontroller family. All features are documented on a functional level
and described in a general sense. All peripherals and modules described in this manual may not
be present in all Atmel AVR XMEGA AU devices.
For all device-specific information such as characterization data, memory sizes, modules,
peripherals available and their absolute memory addresses, refer to the device datasheets.
When several instances of a peripheral exists in one device, each instance will have a unique
name. For example each port module (PORT) have unique name, such as PORTA, PORTB,etc.
Register and bit names are unique within one module instance.
For more details on applied use and code examples for peripherals and modules, refer to the
Atmel AVR XMEGA specific application notes available from http://www.atmel.com/avr.
1.1
Reading the Manual
The main sections describe the various modules and peripherals. Each section contains a short
feature list and overview describing the module. The remaining section describes the features
and functions in more detail.
The register description sections list all registers and describe each register, bit and flag with
their function. This includes details on how to set up and enable various features in the module.
When multiple bits are needed for a configuration setting, these are grouped together in a bit
group. The possible bit group configurations are listed for all bit groups together with their asso-
ciated Group Configuration and a short description. The Group Configuration refers to the
defined configuration name used in the Atmel AVR XMEGA assembler header files and applica-
tion note source code.
The register summary sections list the internal register map for each module type.
The interrupt vector summary sections list the interrupt vectors and offset address for each mod-
ule type.
1.2
Resources
A comprehensive set of development tools, application notes, and datasheets are available for
download from http://www.atmel.com/avr.
1.3
Recommended Reading
• Atmel AVR XMEGA AU device datasheets
• XMEGA application notes
This manual contains general modules and peripheral descriptions. The AVR XMEGA AU device
datasheets contains the device-specific information. The XMEGA application notes and AVR
Software Framework contain example code and show applied use of the modules and peripher-
als.
For new users, it is recommended to read the AVR1000 - Getting Started Writing C Code for
Atmel XMEGA, and AVR1900 - Getting Started with Atmel ATxmega128A1 application notes.
