ATMEGA640 datasheet(423/436 Pages) MICROCHIP

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423

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

DS40002211A

38.5 Rev. 2549N-05/2011

38.6 Rev. 2549M-09/2010

38.7 Rev. 2549L-08/07

Added Atmel QTouch Library Support and QTouch Sensing Capablity Features.

Updated Cross-reference in “Bit 5, 2:0 - WDP3:0: Watchdog Timer Prescaler 3, 2, 1 and 0” on page 65.

Updated Assembly codes in section “USART Initialization” on page 205.

Added “Standard Power-On Reset” on page 360.

Added “Enhanced Power-On Reset” on page 361.

Updated Figure 32-13 on page 381

Updated “Ordering Information” on page 407 to include Tape & Reel devices.

Updated typos in Figure 26-9 on page 276 and in Figure 26-10 on page 277.

Note is added below Table 1-1 on page 3.

The values for “typical characteristics” in Table 31-9 on page 365 and Table 31-10 on page 366, has been

rounded.

Units for tRST and tBOD in Table 31-3 on page 360 have been changed from “ns” to “µs”.

The figure text for Table 31-2 on page 359 has been changed.

Text in first column in Table 30-3 on page 326 has been changed from “Fuse Low Byte” to “Extended

Fuse Byte”.

The text in “Power Reduction Register” on page 52 has been changed.

The value of the inductor in Figure 26-9 on page 276 and Figure 26-10 on page 277 has been changed to

10µH.

“Port A” has been changed into “Port K” in the first paragraph of “Features” on page 268.

10.

Minimum wait delay for tWD_EEPROM in Table 30-16 on page 340 has been changed from 9.0ms to 3.6ms

11.

Dimension A3 is added in “64M2” on page 415.

12.

Several cross-references are corrected.

13.

“COM0A1:0” on page 127 is corrected to “COM0B1:0”.

14.

Corrected some Figure and Table numbering.

15.

Updated Section 10.6 “Low Frequency Crystal Oscillator” on page 43.

Updated note in Table 10-11 on page 45.

Updated Table 10-3 on page 42, Table 10-5 on page 43, Table 10-9 on page 45.

Updated typos in “DC Characteristics” on page 355

Updated “Clock Characteristics” on page 359

Updated “External Clock Drive” on page 359.

Added “System and Reset Characteristics” on page 360.

Updated “SPI Timing Characteristics” on page 363.

Updated “ADC Characteristics – Preliminary Data” on page 365.

Updated ordering code in “ATmega640” on page 407.

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