Overview

The Atmel? AVR? XMEGA? A3 is a family of low power, high performance and peripheral rich CMOS 8/16-bit microcontrollers based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the XMEGA A3 achieves throughputs approaching 1 Million Instructions Per Second (MIPS) per MHz allowing the system designer to optimize power consumption versus processing speed.

特性 Features

? High-performance, Low-power 8/16-bit Atmel? AVR? XMEGATM Microcontroller

? Non-volatile Program and Data Memories

– 64 KB - 256 KB of In-System Self-Programmable Flash

– 4 KB - 8 KB Boot Code Section with Independent Lock Bits

– 2 KB - 4 KB EEPROM

– 4 KB - 16 KB Internal SRAM

? Peripheral Features

– Four-channel DMA Controller with support for external requests

– Eight-channel Event System

– Seven 16-bit Timer/Counters

Four Timer/Counters with 4 Output Compare or Input Capture channels

Three Timer/Counters with 2 Output Compare or Input Capture channels

High Resolution Extensions on all Timer/Counters

Advanced Waveform Extension on one Timer/Counter

– Seven USARTs

IrDA Extension on 1 USART

– AES and DES Crypto Engine

– Two Two-wire Interfaces with dual address match (I2C and SMBus compatible)

– Three SPI (Serial Peripheral Interfaces)

– 16-bit Real Time Counter with Separate Oscillator

– Two Eight-channel, 12-bit, 2 Msps Analog to Digital Converters

– One Two-channel, 12-bit, 1 Msps Digital to Analog Converter

– Four Analog Comparators with Window compare function

– External Interrupts on all General Purpose I/O pins

– Programmable Watchdog Timer with Separate On-chip Ultra Low Power Oscillator

? Special Microcontroller Features

– Power-on Reset and Programmable Brown-out Detection

– Internal and External Clock Options with PLL

– Programmable Multi-level Interrupt Controller

– Sleep Modes: Idle, Power-down, Standby, Power-save, Extended Standby

– Advanced Programming, Test and Debugging Interfaces

JTAG (IEEE 1149.1 Compliant) Interface for test, debug and programming

PDI (Program and Debug Interface) for programming, test and debugging

? I/O and Packages

– 50 Programmable I/O Lines

– 64-lead TQFP

– 64-pad QFN

? Operating Voltage

– 1.6 – 3.6V

? Speed performance

– 0 – 12 MHz @ 1.6 – 3.6V

– 0 – 32 MHz @ 2.7 – 3.6V

Typical Applications

? Industrial control

? Climate control

? Hand-held battery applications

? Factory automation

? ZigBee

? Power tools

? Building control

? Motor control

? HVAC

? Board control

? Networking

? Metering

? White Goods

? Optical

? Medical Applications