Datasheet

22
2593OS–AVR–02/12
ATmega644
9.11 Rev. 2593E - 04/06
9.12 Rev. 2593D - 04/06
9.13 Rev. 2593C - 03/06
9.14 Rev. 2593B - 03/06
9.15 Rev. 2593A-06/05
1. Initial revision.
1. Updated ”Calibrated Internal RC Oscillator” on page 33.
1. Updated ”Bit 6 – ACBG: Analog Comparator Bandgap Select” on page 231.
2. Updated ”Prescaling and Conversion Timing” on page 236.
1. Added “Not recommended in new designs”.
2. Removed RAMPZ– Extended Z-pointer Register for ELPM/SPM from datasheet.
3. Updated Table 10-1 on page 55.
4. Updated code example in ”Interrupt Vectors in ATmega644” on page 55.
5. Updated ”Setting the Boot Loader Lock Bits by SPM” on page 276.
6. Updated ”Register Summary” on page 354.
1. Removed the occurancy of ATmega164 and ATmega324.
2. Updated Adresses in Registers.
3. Updated ”Architectural Overview” on page 9.
4. Updated SRAM sizes in ”SRAM Data Memory” on page 18.
5. Updated ”I/O Memory” on page 20.
6. Updated ”PRR – Power Reduction Register” on page 44.
7. Updated Register bit Discription in ”Register Description” on page 146.
8. Updated Note in ”Overview of the TWI Module” on page 206.
9. Updated Feauters in ”Analog-to-digital Converter” on page 233.
10. Changed name from “SFIOR“ to “ADCSRB“ in ”Starting a Conversion” on page 235, in ”Bit 5 –
ADATE: ADC Auto Trigger Enable” on page 250 and ”Bit 7, 5:3 – Res: Reserved Bits” on page
251.
11. Updated ”Signature Bytes” on page 287.
12. Updated ”DC Characteristics” on page 316.
13. Updated ”Typical Characteristics” on page 326.
14. Updated Example in ”Supply Current of IO modules” on page 331.
15. Updated ”Register Summary” on page 354.
16. Updated Figure 6-2 on page 18 and Figure 21-1 on page 234.
17. Updated ”Errata” on page 365.
18. Updated Table 9-1 on page 47, Table 9-4 on page 51,Table 10-1 on page 55,Table 23-1 on page
260, Table 25-7 on page 287, Table 25-15 on page 299,Table 26-6 on page 322, Table 27-1 on
page 331, Table 27-2 on page 332.