ATtiny48 datasheet(259/266 Pages) ATMEL

259 / 266 page

8008C–AVR–03/09

ATtiny48/88

Table of Contents

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

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

1.1

Pin Descriptions .................................................................................................3

Overview ................................................................................................... 5

2.1

Block Diagram ...................................................................................................5

2.2

Comparison Between ATtiny48 and ATtiny88 ...................................................6

Additional Information ............................................................................. 7

3.1

Resources .........................................................................................................7

3.2

About Code Examples .......................................................................................7

3.3

Data Retention ...................................................................................................7

3.4

Disclaimer ..........................................................................................................7

AVR CPU Core .......................................................................................... 8

4.1

Introduction ........................................................................................................8

4.2

Architectural Overview .......................................................................................8

4.3

ALU – Arithmetic Logic Unit ...............................................................................9

4.4

Status Register ..................................................................................................9

4.5

General Purpose Register File ........................................................................11

4.6

Stack Pointer ...................................................................................................12

4.7

Instruction Execution Timing ...........................................................................13

4.8

Reset and Interrupt Handling ...........................................................................13

Memories ................................................................................................ 16

5.1

In-System Reprogrammable Flash Program Memory .....................................16

5.2

SRAM Data Memory ........................................................................................17

5.3

EEPROM Data Memory ..................................................................................18

5.4

I/O Memory ......................................................................................................21

5.5

System Clock and Clock Options ......................................................... 25

6.1

Clock Systems and their Distribution ...............................................................25

6.2

Clock Sources .................................................................................................26

6.3

Calibrated Internal Oscillator ...........................................................................27

6.4

128 kHz Internal Oscillator ..............................................................................28

6.5

External Clock .................................................................................................29

ATtiny48 Datasheet(PDF) 259 Page - ATMEL Corporation

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