ATXMEGA128D4-U ATXMEGA128-EUS ATXMEGA16A4-AU ATXMEGA16A4-AUR ATXMEGA16A4-CU ATXMEGA16A4-CUR ATXMEGA16A4-MH ATXMEGA16A4-MHR ATXMEGA16A4-MU ATXMEGA16A4U-AN