ATmega169P datasheet(386/393 Pages) ATMEL

386 / 393 page

8018M–AVR–07/09

ATmega169P

Table of Contents

Features ..................................................................................................... 1

Pin Configurations ................................................................................... 2

1.1Pinout - TQFP/QFN/MLF ...........................................................................................2

1.2Pinout - DRQFN ........................................................................................................3

Overview ................................................................................................... 4

2.1Block Diagram ...........................................................................................................4

2.2Pin Descriptions .........................................................................................................6

Resources ................................................................................................. 9

Data Retention .......................................................................................... 9

About Code Examples ........................................................................... 10

AVR CPU Core ........................................................................................ 11

6.1Introduction ..............................................................................................................11

6.2Architectural Overview .............................................................................................11

6.3ALU – Arithmetic Logic Unit .....................................................................................12

6.4Status Register ........................................................................................................13

6.5General Purpose Register File ................................................................................14

6.6Stack Pointer ...........................................................................................................15

6.7Instruction Execution Timing ...................................................................................16

6.8Reset and Interrupt Handling ...................................................................................17

AVR Memories ........................................................................................ 19

7.1In-System Reprogrammable Flash Program Memory .............................................19

7.2SRAM Data Memory ................................................................................................20

7.3EEPROM Data Memory ..........................................................................................22

7.4EEPROM Register Description ................................................................................27

7.5I/O Memory ..............................................................................................................29

7.6General Purpose I/O Registers ...............................................................................29

System Clock and Clock Options ......................................................... 30

8.1Clock Systems and their Distribution .......................................................................30

8.2Clock Sources .........................................................................................................31

8.3Default Clock Source ...............................................................................................32

8.4Calibrated Internal RC Oscillator .............................................................................32

8.5Crystal Oscillator .....................................................................................................33

ATmega169P Datasheet(PDF) 386 Page - ATMEL Corporation