ATXMEGA256A3BU-MHR

MCU 8Bit/16Bit XMEGA AVR RISC 256KB Flash 1.8V/2.5V/3.3V 64Pin VQFN EP T/R

Overview

The Atmel AVR XMEGA is a family of low power, high performance, and peripheral rich 8/16-bit microcontrollers based on the AVR enhanced RISC architecture. By executing instructions in a single clock cycle, the AVR XMEGA device achieves CPU throughput approaching one million instructions per second MIPS per megahertz, allowing the system designer to optimize power consumption versus processing speed.

The AVR CPU combines a rich instruction set with 32 general purpose working registers. All 32 registers are directly connected to the arithmetic logic unit ALU, allowing two independent registers to be accessed in a single instruction, executed in one clock cycle. The resulting architecture is more code efficient while achieving throughputs many times faster than conventional single-accumulator or CISC based microcontrollers.

Features

• High-performance, low-power Atmel®AVR®XMEGA® 8/16-bit Microcontroller

• Nonvolatile program and data memories

 • 256KBytes of in-system self-programmable flash

 • 8KBytes boot section

 • 4KBytes EEPROM

 • 16KBytes internal SRAM

• Peripheral features

 • Four-channel DMA controller

 • Eight-channel event system

 • Seven 16-bit timer/counters

    • Four timer/counters with four output compare or input capture channels

    • Three timer/counters with two output compare or input capture channels

    • High resolution extension on all timer/counters

    • Advanced waveform extension AWeX on one timer/counter

 • One USB device interface

    • USB 2.0 full speed 12Mbps and low speed 1.5Mbps device compliant

    • 32 Endpoints with full configuration flexibility

 • Six USARTs with IrDA support for one USART

 • Two two-wire interfaces with dual address match I2C and SMBus compatible

 • Two serial peripheral interfaces SPIs

 • AES and DES crypto engine

 • CRC-16 CRC-CCITT and CRC-32 IEEE® 802.3 generator

 • 32-bit real time counter RTC with separate oscillator and battery backup system

 • Two sixteen-channel, 12-bit, 2msps Analog to Digital Converters

 • One two-channel, 12-bit, 1msps Digital to Analog Converter

 • Four Analog Comparators with window compare function, and current sources

 • External interrupts on all general purpose I/O pins

 • Programmable watchdog timer with separate on-chip ultra low power oscillator

 • QTouch® library support

    • Capacitive touch buttons, sliders and wheels

• Special microcontroller features

 • Power-on reset and programmable brown-out detection

 • Internal and external clock options with PLL and prescaler

 • Programmable multilevel interrupt controller

 • Five sleep modes

 • Programming and debug interfaces

    • JTAG IEEE 1149.1 compliant interface, including boundary scan

    • PDI Program and Debug Interface

• I/O and packages

 • 47 programmable I/O pins

 • 64-lead TQFP

 • 64-pad QFN

• Operating voltage

 • 1.6 – 3.6V

• Operating frequency

 • 0 – 12MHz from 1.6V

 • 0 – 32MHz from 2.7V