The high-performance, low-power 8/16-bit AVR XMEGA microcontroller combines 192KB in-system programmable flash memory (8KB boot code section) with read-while-write capabilities, 2KB EEPROM, 16KB SRAM, a four-channel event system, a programmable multi-level interrupt controller, 50 general purpose I/O lines.

Atmel AVR CPU
Memories
DMAC - Direct memory access controller
Event system
System clock and clock options
Power management and sleep modes
System control and reset
WDT - Watchdog timer
Interrupts and programmable multilevel interrupt controller
PORT - I/O ports
TC - 16-bit timer/counters
AWeX - Advanced waveform extension
Hi-Res - High resolution extension
RTC - Real-time counter
USB - Universal serial bus interface