Atmel has several series of XMEGA chips. How does the numbering scheme work?

  • \$\begingroup\$ I don't see a problem with questions of the format "What's the difference between these two similar part numbers?" \$\endgroup\$
    – endolith
    Aug 8, 2011 at 16:47
  • \$\begingroup\$ I have had many times that I have seen odd numbering schemes that are not overly obvious as to what they mean. Asking this type of question can very much help with the electronic design process. \$\endgroup\$
    – Kellenjb
    Aug 8, 2011 at 18:54

2 Answers 2


Nice Atmel brochure. Good general overview and all members of family listed on bottom of page 11.

Whence cometh this ...

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  • \$\begingroup\$ Try to place comments relating to the validity of the question on the question, not in an answer. \$\endgroup\$
    – Kortuk
    Aug 8, 2011 at 14:49

From the current parts list, I gather the first number nnn is the amount of flash in kilobytes. The letter L is one of A or D, the cheaper D parts have no DMA or DAC. The number m is 1, 3, 4 for 100, 64, 44 pin parts, and a U suffix signifies a part with USB.


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