ATMEGA640 datasheet(39/40 Pages) ATMEL

Part #	ATMEGA640

Description	8-bit Atmel Microcontroller with 64K/128K/256K Bytes In-System Programmable Flash

PDF	40 Pages

Scroll/Zoom	100%

Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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39 / 40 page

2549NS–AVR–05/11

ATmega640/1280/1281/2560/2561

12.12 Rev. 2549C-09/05

12.13 Rev. 2549B-05/05

12.14 Rev. 2549A-03/05

Updated Speed Grade in section “Features” on page 1.

Added “Resources” on page 11.

Updated “SPI – Serial Peripheral Interface” on page 195. In Slave mode, low and high period SPI

clock must be larger than 2 CPU cycles.

Updated “Bit Rate Generator Unit” on page 247.

Updated “Maximum speed vs. VCC” on page 373.

Updated “Ordering Information” on page 20.

Updated “Packaging Information” on page 25. Package 64M1 replaced by 64M2.

Updated “Errata” on page 29.

JTAG ID/Signature for ATmega640 updated: 0x9608.

Updated Table 13-7 on page 81.

Updated “Serial Programming Instruction set” on page 352.

Updated “Errata” on page 29.

Initial version.

ATMEGA640 Datasheet(PDF) 39 Page - ATMEL Corporation