Rainbow-electronics ATtiny43U Manuel d'utilisateur télécharger pdf (Page 177)

8048B–AVR–03/09

Table of Contents

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

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

1.1 Pin Descriptions .................................................................................................2

2 Overview ................................................................................................... 4

3 About ......................................................................................................... 6

3.1 Resources .........................................................................................................6

3.2 Code Examples .................................................................................................6

3.3 Data Retention ...................................................................................................6

3.4 Disclaimer ..........................................................................................................6

4 AVR CPU Core .......................................................................................... 7

4.1 Introduction ........................................................................................................7

4.2 Architectural Overview .......................................................................................7

4.3 ALU – Arithmetic Logic Unit ...............................................................................8

4.4 Status Register ..................................................................................................8

4.5 General Purpose Register File ........................................................................10

4.6 Stack Pointer ...................................................................................................11

4.7 Instruction Execution Timing ...........................................................................12

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

5 Memories ................................................................................................ 15

5.1 Overview ..........................................................................................................15

5.2 In-System Re-programmable Flash Program Memory ....................................15

5.3 SRAM Data Memory ........................................................................................15

5.4 EEPROM Data Memory ..................................................................................16

5.5 I/O Memory ......................................................................................................20

5.6 Register Description ........................................................................................20

6 System Clock and Clock Options ......................................................... 23

6.1 Clock Systems and their Distribution ...............................................................23

6.2 Clock Sources .................................................................................................24

6.3 System Clock Prescaler ..................................................................................27

6.4 Clock Output Buffer .........................................................................................28

6.5 Register Description ........................................................................................28

7 Power Management and Sleep Modes ................................................. 31

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Rainbow-electronics ATtiny43U Manuel d'utilisateur Page 177