Overview
The Atmel® AVR® XMEGA™ A1 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 A1 achieves throughputs approaching 1 Million Instructions Per Second (MIPS) per MHz 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 the 32 registers are directly connected to the Arithmetic Logic Unit (ALU), allowing two independent registers to be accessed in one single instruction, executed in one clock cycle. The resulting architecture is more code efficient while achieving throughputs many times faster than conven tional single-accumulator or CISC based microcontrollers.

FEATUREs
• High-performance, Low-power 8/16-bit Atmel® AVR® XMEGATM Microcontroller
• Non-Volatile Program and Data Memories
   – 64K - 384K Bytes of In-System Self-Programmable Flash
   – 4K - 8K Bytes Boot Section with Independent Lock Bits
   – 2 KB - 4 KB EEPROM
   – 4 KB - 32 KB Internal SRAM
      External Bus Interface for up to 16M bytes SRAM
      External Bus Interface for up to 128M bit SDRAM
• Peripheral Features
   – Four-channel DMA Controller with support for external requests
   – Eight-channel Event System
   – Eight 16-bit Timer/Counters
      Four Timer/Counters with 4 Output Compare or Input Capture channels
      Four Timer/Counters with 2 Output Compare or Input Capture channels
      High-Resolution Extension on all Timer/Counters
      Advanced Waveform Extension on two Timer/Counters
   – Eight USARTs
      IrDA modulation/demodulation for one USART
   – Four Two-Wire Interfaces with dual address match (I2C and SMBus compatible)
   – Four SPI (Serial Peripheral Interface) peripherals
   – AES and DES Crypto Engine
   – 16-bit Real Time Counter with separate Oscillator
   – Two Eight-channel, 12-bit, 2 Msps Analog to Digital Converters
   – Two Two-channel, 12-bit, 1 Msps Digital to Analog Converters
   – 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 and Prescaler
   – 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 programming, test and debugging PDI (Program and Debug Interface) for programming and debugging
• I/O and Packages
   – 78 Programmable I/O Lines
   – 100 - lead TQFP
   – 100 - ball CBGA
   – 100 - ball VFBGA
• 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