Revision History

Doc Rev. Date Comments
B 02/2018
  1. 1.Explanations in the Digital Supply section were improved.
  2. 2.Obsolete section on Noise Implications was removed.
A 08/2017
  1. 1.Chapter “Unused XTAL Pins” is added.
  2. 2.A note for the Example Layout has been added.
  3. 3.New document template. Microchip DS00002519A replaces Atmel 2521S.
2521R 09/2016
  1. 1.The filename and the document number in part of this revision history have been corrected.
  2. 2.Trademark corrections.
  3. 3.Some minor corrections in the text.
2521Q 06/2016
  1. 1.General improvement of descriptions.
  2. 2.Added example layout for ATmega324PB device.
2521P 10/2015 Updated the following sections:
  1. 1.About Crystals and Ceramic Resonators
  2. 2.Recommended Capacitor Values
2521O 09/2015 Corrected the figure Example Layout.
2521N 06/2015 Added Noise Implications.
2521M 09/2014 Fixed some typos in External RESET Switch.
2521L 07/2013
  1. 1.Updated Figure 2.
  2. 2.General improvements in regards of descriptions.