ATMEGA640 datasheet(39/40 Pages) ATMEL

39 / 40 page

2549PS–AVR–10/2012

ATmega640/1280/1281/2560/2561

12.13 Rev. 2549D-12/05

12.14 Rev. 2549C-09/05

12.15 Rev. 2549B-05/05

12.16 Rev. 2549A-03/05

Advanced Information Status changed to Preliminary.

Changed number of I/O Ports from 51 to 54.

Updatet typos in “TCCR0A – Timer/Counter Control Register A” on page 129.

Updated Features in “ADC – Analog to Digital Converter” on page 275.

Updated Operation in“ADC – Analog to Digital Converter” on page 275

Updated Stabilizing Time in “Changing Channel or Reference Selection” on page 282.

Updated Figure 26-1 on page 276, Figure 26-9 on page 285, Figure 26-10 on page 285.

Updated Text in “ADCSRB – ADC Control and Status Register B” on page 290.

Updated Note for Table 4 on page 43, Table 13-15 on page 86, Table 26-3 on page 289 and

Table 26-6 on page 295.

10.

Updated Table 31-9 on page 377 and Table 31-10 on page 378.

11.

Updated “Filling the Temporary Buffer (Page Loading)” on page 323.

12.

Updated “Typical Characteristics” on page 385.

13.

Updated “Packaging Information” on page 25.

14.

Updated “Errata” on page 29.

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. V

CC” 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