The Atmel AVR Microcontroller: MEGA and XMEGA in Assembly and C (Book Only) (Explore Our New Electronic Tech 1st Editions): Huang, Han-Way: 9781133607281: Amazon.com: Books
Atmel Launches Ultra-low Power, 8/16-bit AVR XMEGA Series with USB and High-precision Analog
AVR XMEGA E Series 8/16-Bit MCUs - Microchip Technology | Mouser