Datasheet

439
ATmega640/1280/1281/2560/2561
2549K–AVR–01/07
Rev. 2549F-04/06
Rev. 2549E-04/06
Rev. 2549D-12/05
Rev. 2549C-09/05
8. Updated “Ordering Information” on page 424.
9. Added Package information “100C1” on page 430.
10. Updated “Errata” on page 433.
1. Updated Figure 15 on page 28, Figure 16 on page 29 and Figure 17 on
page 29.
2. Updated Table 88 on page 191 and Table 89 on page 191.
3. Updated Features in “ADC – Analog to Digital Converter” on page 279.
4. Updated “Fuse Bits” on page 343.
1. Updated “Features” on page 1.
2. Updated Table 27 on page 60.
3. Updated note for Table 27 on page 60.
4. Updated “Bit 6 – ACBG: Analog Comparator Bandgap Select” on page
277.
5. Updated “Prescaling and Conversion Timing” on page 282.
5. Updated “Maximum speed vs. VCC” on page 377.
6. Updated “Ordering Information” on page 424.
1. Advanced Information Status changed to Preliminary.
2. Changed number of I/O Ports from 51 to 54.
3. Updatet typos in “TCCR0A – Timer/Counter Control Register A” on page
130.
4. Updated Features in “ADC – Analog to Digital Converter” on page 279.
5. Updated Operation in“ADC – Analog to Digital Converter” on page 279
6. Updated Stabilizing Time in “Changing Channel or Reference Selection”
on page 286.
7. Updated Figure 113 on page 280, Figure 121 on page 289, Figure 122 on
page 289.
8. Updated Text in “ADCSRB – ADC Control and Status Register B” on page
295.
9. Updated Note for Table 4 on page 41, Table 51 on page 99, Table 128 on
page 294 and Table 131 on page 299.
10. Updated Table 170 on page 382 and Table 171 on page 383.
11. Updated “Filling the Temporary Buffer (Page Loading)” on page 329.
12. Updated “Typical Characteristics” on page 390.
13. Updated “Packaging Information” on page 429.
14. Updated “Errata” on page 433.
1. Updated Speed Grade in section “Features” on page 1.
2. Added “Resources” on page 9.
3. Updated “SPI – Serial Peripheral Interface” on page 199. In Slave mode,
low and high period SPI clock must be larger than 2 CPU cycles.