XMEGAA_09 datasheet(2/445 Pages) ATMEL

2 / 445 page

8077H–AVR–12/09

XMEGA A

About the Manual

This document contains in-depth documentation of all peripherals and modules available for the

AVR XMEGA A 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 XMEGA A devices.

For all device specific information such as characterization data, memory sizes, modules and

peripherals available and their absolute memory addresses refer to the device datasheets.

When several instances of one peripheral such as a PORT exist in one device, each instance of

a module will have a unique name, such as PORTA, PORTB etc. Register, bit names are unique

within one module.

For more details on applied use and code examples for all peripherals and modules, refer to the

XMEGA A 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 of the most important features and a short overview describing the module. The

remaining section describes the features and functions in more details.

The register description sections list all registers, and describe each bit/flag and its 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 associated Group Configu-

ration and a short description. The Group Configuration refer to the defined configuration name

used in the XMEGA A and assembler header files and application 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 on http://www.atmel.com/avr.

1.3

XMEGAA 数据表(PDF) 2 Page - ATMEL Corporation