Datasheet

i
8284D–AVR–6/11
ATmega169A/PA/329A/PA/3290A/PA/649A/P/6490A/P
Table of Contents
Features ..................................................................................................... 1
1 Pin Configurations ................................................................................... 2
1.1Pinout - 64A (TQFP) and 64M1 (QFN/MLF) ..............................................................2
1.2Pinout - 100A (TQFP) ................................................................................................3
1.3Pinout - 64MC (DRQFN) ...........................................................................................4
2 Overview ................................................................................................... 5
2.1Block Diagram ...........................................................................................................5
2.2Comparison Between
ATmega169A/169PA/329A/329PA/649A/649P/3290A/3290PA/6490A/6490P 7
2.3Pin Descriptions ........................................................................................................8
3 Resources ............................................................................................... 11
4 Data Retention ........................................................................................ 11
5 About Code Examples ........................................................................... 11
6 Capacitive touch sensing ...................................................................... 11
7 AVR CPU Core ........................................................................................ 12
7.1Overview .................................................................................................................12
7.2Architectural Overview ............................................................................................12
7.3ALU – Arithmetic Logic Unit ....................................................................................13
7.4AVR Status Register ...............................................................................................13
7.5General Purpose Register File ................................................................................15
7.6Stack Pointer ...........................................................................................................16
7.7Instruction Execution Timing ...................................................................................17
7.8Reset and Interrupt Handling ..................................................................................18
8 AVR Memories ........................................................................................ 20
8.1In-System Reprogrammable Flash Program Memory .............................................20
8.2SRAM Data Memory ...............................................................................................21
8.3EEPROM Data Memory ..........................................................................................22
8.4I/O Memory ..............................................................................................................26
8.5General Purpose I/O Registers ...............................................................................26
8.6Register Description ................................................................................................27
9 System Clock and Clock Options ......................................................... 30
9.1Clock Systems and their Distribution .......................................................................30