Advanced Capabilities of XMega

• SRAM/DRAM support (A1 series) as extended 'data' memory
• Complex Waveform generation (E5 series)
• Built-in CRC, encryption support (various)
• Real Time Clock (periodic wakeup from sleep)
• Software clock control - can reduce clock speed to save power
• Faster SPI interface (approximately twice the speed of ATMega)
• Event System (can be used lieu of interrupts to drive internal peripherals)