ATMEGA640 datasheet(422/436 Pages) MICROCHIP

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ATmega640/V-1280/V-1281/V-2560/V-2561/V [DATASHEET]

DS40002211A

38. Datasheet Revision History

Note that the referring page numbers in this section are referring to this document. The referring revisions in this

section are referring to the document revision.

38.1 Rev. DS40002211A-05/2020

38.2 Rev. 2549Q-02/2014

38.3 Rev. 2549P-10/2012

38.4 Rev. 2549O-05/2012

Moved document to Microchip template. Replaces Atmel version 2549. No technical content changed.

Updated the “Reset Sources” on page 57. Brown-out Reset: The MCU is reset when the supply voltage

AVcc is below the Brown-out Reset threshold (VBOT) and the Brown-out Detector is enabled.

Updated the Figure 12-1 on page 58. Power-on reset is now connected to AVcc and not to Vcc.

Updated the content in “Brown-out Detection” on page 59. Replaced Vcc by AVcc throughout the section.

Updated the Figure 12-5 on page 60. Replaced Vcc by AVcc.

Updated “External Interrupts” on page 109. Removed the text “Note that recognition of falling or rising

edge.....”.

Updated the description of “PCMSK1 – Pin Change Mask Register 1” on page 113. The description men-

tions "PCIE1 bit in EIMSK". This has been changed to “PCIE1 bit in PCICR”.

Updated “Ordering Information” in “ATmega2561” on page 411.

Removed Errata “Inaccurate ADC conversion in differential mode with 200× gain” from “ATmega1280 rev.

B” on page 416 and from “ATmega1281 rev. B” on page 417

Updated “Errata” in “ATmega2560 rev. F” on page 417 and in “ATmega2561 rev. F” on page 419.

10.

Updated the datasheet with new Atmel brand (new logo and addresses).

Replaced drawing of “64M2” on page 415.

Former page 439 has been deleted as the content of this page did not belong there (same page as the

last page).

Some small correction made in the setup.

The datasheet changed status from Preliminary to Complete. Removed “Preliminary” from the front page.

Replaced Figure 10-3 on page 44 by a new one.

Updated the last page to include the new address for Atmel Japan site.

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