Datasheet

23
ATmega48/88/168
2545DS–AVR–07/04
Datasheet Change
Log
Please note that the referring page numbers in this section are referred to this docu-
ment. The referring revision in this section are referring to the document revision.
Changes from Rev.
2545C-04/04 to Rev.
2545D-07/04
Changes from Rev.
2545B-01/04 to Rev.
2545C-04/04
Changes from Rev.
2545A-09/03 to Rev.
2545B-01/04
1. Updated instructions used with WDTCSR in relevant code examples.
2. Updated Table 8 on page 28, Table 21 on page 43, Table 112 on page
269, Table 114 on page 269, and Table 131 on page 288.
3. Updated “System Clock Prescaler” on page 33.
4. Moved “Timer/Counter2 Interrupt Mask Register – TIMSK2” and
“Timer/Counter2 Interrupt Flag Register – TIFR2” to
“8-bit Timer/Counter Register Description” on page 143.
5. Updated cross-reference in “Electrical Interconnection” on page 199.
6. Updated equation in “Bit Rate Generator Unit” on page 204.
7. Added “Page Size” on page 274.
8. Updated “Serial Programming Algorithm” on page 287.
9. Updated “Ordering Information” for “ATmega168” on page 16
10. Updated “Errata ATmega88” on page 21 and “Errata ATmega168” on
page 22.
1. Speed Grades changed:
- 12MHz to 10MHz
- 24MHz to 20MHz
2. Updated “Maximum Speed vs. VCC” on page 293.
3. Updated “Ordering Information” on page 14.
4. Updated “Errata ATmega88” on page 21.
1. Added PDIP to “I/O and Packages”, updated “Speed Grade” and Power
Consumption Estimates in “Features” on page 1.
2. Updated “Stack Pointer” on page 11 with RAMEND as recommended
Stack Pointer value.
3. Added section “Power Reduction Register” on page 37 and a note
regarding the use of the PRR bits to 2-wire, Timer/Counters, USART,
Analog Comparator and ADC sections.
4. Updated “Watchdog Timer” on page 46.
5. Updated Figure 55 on page 125 and Table 56 on page 126.
6. Extra Compare Match Interrupt OCF2B added to features in section “8-
bit Timer/Counter2 with PWM and Asynchronous Operation” on page
132
7. Updated Table 19 on page 37, Table 102 on page 245, Table 118 to Table
121 on page 272 to 273 and Table 98 on page 236. Added note 2 to Table
115 on page 270. Fixed typo in Table 42 on page 81.
8. Updated whole “ATmega48/88/168 Typical Characteristics – Preliminary
Data” on page 298.
9. Added item 2 to 5 in “Errata ATmega48” on page 20.