38.8 Rev. 2549E-04/06
1.
2.
3.
4.
Updated “Features” on page 1.
Updated Table 12-1 on page 62.
Updated note for Table 12-1 on page 62.
Updated “Bit 6 – ACBG: Analog Comparator Bandgap Select” on page
272.
5.
5.
6.
Updated “Prescaling and Conversion Timing” on page 278.
Updated “Maximum speed vs. VCC” on page 373.
Updated “Ordering Information” on page 422.
38.9 Rev. 2549D-12/05
1.
2.
3.
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.
4.
5.
6.
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.
7.
8.
9.
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
291.
Updated Note for Table 4 on page 42, Table 13-14 on page 86, Table 26-3
on page 290 and Table 26-6 on page 296.
10. Updated Table 31-7 on page 379 and Table 31-8 on page 380.
11. Updated “Filling the Temporary Buffer (Page Loading)” on page 324.
12. Updated “Typical Characteristics” on page 387.
13. Updated “Packaging Information” on page 427.
14. Updated “Errata” on page 431.
38.10 Rev. 2549C-09/05
1.
2.
3.
Updated Speed Grade in section “Features” on page 1.
Added “Resources” on page 10.
Updated “SPI – Serial Peripheral Interface” on page 196. In Slave mode,
low and high period SPI clock must be larger than 2 CPU cycles.
4.
5.
6.
7.
Updated “Bit Rate Generator Unit” on page 247.
Updated “Maximum speed vs. VCC” on page 373.
Updated “Ordering Information” on page 422.
Updated “Packaging Information” on page 427. Package 64M1 replaced
by 64M2.
8.
Updated “Errata” on page 431.
438
ATmega640/1280/1281/2560/2561
2549L–AVR–08/07
ATMEL [ ATMEL ]
