Atmel AVR542: Migration from ATmega325P/3250P/329P/3290P to ATmega325PA/3250PA/329PA/3290PA 1 Introduction In order to optimize the manufacturing process and to further reduce current consumption, an optimized version of Atmel® ATmega325P/3250P/329P/3290P has been introduced. 8-bit Atmel Microcontrollers Application Note The Atmel ATmega325PA/3250PA/329PA/3290PA is a functionally identical, dropin replacement for the ATmega325P/3250P/329P/3290P. All devices are subject to the same qualification process and same set of production tests. ATmega325P/3250P/329P/3290P and ATmega325PA/3250PA/329PA/3290PA have separate datasheets. This application note outlines the differences between the two devices and the datasheets. There is also a detailed change log to assist the user at the end of the ATmega325PA/3250PA/329PA/3290PA datasheet. Remember to always use the latest revision of the device datasheet. Minor differences in typical characteristics are not discussed in this document as long as the low and high limits remain the same. For detailed information about the typical characteristics, see sections “Electrical Characteristics” and “Typical Characteristics” of the device datasheets. Note: This application note serves as a guide to ease migration. For complete device details, always refer to the most recent version of the ATmega325PA/3250PA/329PA/3290PA datasheet. Rev. 8422A-AVR-11/11 2 Changes in characteristics This section outlines major differences in characteristics that may have an effect on the application in which the device is used. For detailed information, refer to the most recent version of the device datasheets. 2.1 Current consumption Active and idle mode current consumption of the device has been reduced significantly. Table 2-1 and Table 2-2 present typical current consumption figures at room temperature. All values are taken from device datasheets, unless otherwise noted. Table 2-1. Typical Current Consumption of Device at Room Temperature Mode Active Idle ATmega325P ATmega3250P ATmega325PA ATmega3250PA Change VCC = 2V, f = 1MHz 0.5mA 0.37mA -26% VCC = 3V, f = 4MHz 2.6mA 2.4mA -8% VCC = 5V, f = 8MHz 9mA 5.3mA -41% VCC = 2V, f = 1MHz 0.14mA 0.14mA 0% VCC = 3V, f = 4MHz 0.75mA 0.60mA -20% VCC = 5V, f = 8MHz 2.9mA 1.6mA -45% Condition Table 2-2. Typical Current Consumption of Device at Room Temperature Mode Active Idle 2 ATmega329P ATmega3290P ATmega329PA ATmega3290PA Change VCC = 2V, f = 1MHz 0.5mA 0.37mA -26% VCC = 3V, f = 4MHz 2.6mA 2.4mA -8% VCC = 5V, f = 8MHz 9mA 5.3mA -41% VCC = 2V, f = 1MHz 0.14mA 0.14mA 0% VCC = 3V, f = 4MHz 0.75mA 0.60mA -20% VCC = 5V, f = 8MHz 2.9mA 1.6mA -45% Condition Atmel AVR542 8422A-AVR-11/11 Atmel AVR542 3 Datasheet changes For a summary of changes, see the datasheet revision history at the end of the Atmel ATmega325PA/3250PA/329PA/3290PA datasheet. 3 8422A-AVR-11/11 Atmel Corporation 2325 Orchard Parkway San Jose, CA 95131 USA Tel: (+1)(408) 441-0311 Fax: (+1)(408) 487-2600 www.atmel.com Atmel Asia Limited Unit 01-5 & 16, 19F BEA Tower, Milennium City 5 418 Kwun Tong Road Kwun Tong, Kowloon HONG KONG Tel: (+852) 2245-6100 Fax: (+852) 2722-1369 Atmel Munich GmbH Business Campus Parkring 4 D-85748 Garching b. Munich GERMANY Tel: (+49) 89-31970-0 Fax: (+49) 89-3194621 Atmel Japan 16F, Shin Osaki Kangyo Bldg. 1-6-4 Osaki Shinagawa-ku Tokyo 104-0032 JAPAN Tel: (+81) 3-6417-0300 Fax: (+81) 3-6417-0370 © 2011 Atmel Corporation. All rights reserved. ® Atmel , Atmel logo and combinations thereof, and others are registered trademarks or trademarks of Atmel Corporation or its subsidiaries. Other terms and product names may be trademarks of others. Disclaimer: The information in this document is provided in connection with Atmel products. No license, express or implied, by estoppel or otherwise, to any intellectual property right is granted by this document or in connection with the sale of Atmel products. EXCEPT AS SET FORTH IN THE ATMEL TERMS AND CONDITIONS OF SALES LOCATED ON THE ATMEL WEBSITE, ATMEL ASSUMES NO LIABILITY WHATSOEVER AND DISCLAIMS ANY EXPRESS, IMPLIED OR STATUTORY WARRANTY RELATING TO ITS PRODUCTS INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, CONSEQUENTIAL, PUNITIVE, SPECIAL OR INCIDENTAL DAMAGES (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS AND PROFITS, BUSINESS INTERRUPTION, OR LOSS OF INFORMATION) ARISING OUT OF THE USE OR INABILITY TO USE THIS DOCUMENT, EVEN IF ATMEL HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. Atmel makes no representations or warranties with respect to the accuracy or completeness of the contents of this document and reserves the right to make changes to specifications and product descriptions at any time without notice. Atmel does not make any commitment to update the information contained herein. Unless specifically provided otherwise, Atmel products are not suitable for, and shall not be used in, automotive applications. Atmel products are not intended, authorized, or warranted for use as components in applications intended to support or sustain life. 8422A-AVR-11/11