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 conventional single-accumulator or CISC based microcontrollers.
The XMEGA A1 devices provides the following features: In-System Programmable Flash with Read-While-Write capabilities, Internal EEPROM and SRAM, four-channel DMA Controller, eight-channel Event System, Programmable Multi-level Interrupt Controller, 78 general purpose I/O lines, 16-bit Real Time Counter (RTC), eight flexible 16-bit Timer/Counters with compare modes and PWM, eight USARTs, four Two Wire Serial Interfaces (TWIs), four Serial Peripheral Interfaces (SPIs), AES and DES crypto engine, two 8-channel, 12-bit ADCs with optional differential input with programmable gain, two 2-channel, 12-bit DACs, four analog comparators with window mode, programmable Watchdog Timer with seperate Internal Oscillator, accurate internal oscillators with PLL and prescaler and programmable Brown-Out Detection.
High-performance, Low-power 8/16-bit Atmel? AVR? XMEGATM Microcontroller
Non-Volatile Program and Data Memories
[1] 64K - 384K Bytes of In-System Self-Programmable Flash
[2] 4K - 8K Bytes Boot Section with Independent Lock Bits
[3] 2 KB - 4 KB EEPROM
[4] 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
[1] Four-channel DMA Controller with support for external requests
[2] Eight-channel Event System
[3] Eight 16-bit Timer/Counters
[4] Eight USARTs
[5] Four Two-Wire Interfaces with dual address match (I2C and SMBus compatible)
[6] Four SPI (Serial Peripheral Interface) peripherals
[7] AES and DES Crypto Engine
[8] 16-bit Real Time Counter with separate Oscillator
[9] Two Eight-channel, 12-bit, 2 Msps Analog to Digital Converters
[10] Two Two-channel, 12-bit, 1 Msps Digital to Analog Converters
[11] Four Analog Comparators with Window compare function
[12] External Interrupts on all General Purpose I/O pins
[13] Programmable Watchdog Timer with Separate On-chip Ultra Low Power Oscillator
Special Microcontroller Features
[1] Power-on Reset and Programmable Brown-out Detection
[2] Internal and External Clock Options with PLL and Prescaler
[3] Programmable Multi-level Interrupt Controller
[4] Sleep Modes: Idle, Power-down, Standby, Power-save, Extended Standby
[5] Advanced Programming, Test and Debugging Interfaces
I/O and Packages
[1] 78 Programmable I/O Lines
[2] 100 - lead TQFP
[3] 100 - ball CBGA
[4] 100 - ball VFBGA
Operating Voltage:1.6 – 3.6V
Speed performance
[1] 12 MHz @ 1.6 – 3.6V
[2] 32 MHz @ 2.7 – 3.6V