ATMEGA48-15AZV Ver la hoja de datos (PDF) - Atmel Corporation
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ATMEGA48-15AZV Datasheet PDF : 340 Pages
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Atmel ATmega48/88/168 Automotive
37. Table of Contents
Features ..................................................................................................... 1
1 Pin Configurations ................................................................................... 2
1.1 Disclaimer ..........................................................................................................2
2 Overview ................................................................................................... 2
2.1 Block Diagram ...................................................................................................3
2.2 Automotive Quality Grade .................................................................................4
2.3 Comparison Between ATmega48, ATmega88, and ATmega168 .....................5
2.4 Pin Descriptions .................................................................................................5
3 About Code Examples ............................................................................. 7
4 AVR CPU Core .......................................................................................... 7
4.1 Introduction ........................................................................................................7
4.2 Architectural Overview .......................................................................................7
4.3 ALU – Arithmetic Logic Unit ...............................................................................9
4.4 Status Register ..................................................................................................9
4.5 General Purpose Register File ........................................................................10
4.6 Stack Pointer ...................................................................................................11
4.7 Instruction Execution Timing ...........................................................................12
4.8 Reset and Interrupt Handling ...........................................................................12
5 AVR ATmega48/88/168 Memories ........................................................ 14
5.1 In-System Reprogrammable Flash Program Memory .....................................14
5.2 SRAM Data Memory ........................................................................................16
5.3 EEPROM Data Memory ..................................................................................17
5.4 I/O Memory ......................................................................................................23
6 System Clock and Clock Options ......................................................... 24
6.1 Clock Systems and their Distribution ...............................................................24
6.2 Clock Sources .................................................................................................25
6.3 Low Power Crystal Oscillator ...........................................................................26
6.4 Full Swing Crystal Oscillator ............................................................................28
6.5 Low Frequency Crystal Oscillator ....................................................................30
6.6 Calibrated Internal RC Oscillator .....................................................................30
6.7 128 kHz Internal Oscillator ..............................................................................32
6.8 External Clock .................................................................................................32
7530J–AVR–03/12
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