ATMEGA328P datasheet(9/294 Pages) ATMEL

No. de pieza	ATMEGA328P

Descripción Electrónicos	8-bit AVR Microcontroller with 32K Bytes In-System Programmable Flash

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Fabricante Electrónico	ATMEL [ATMEL Corporation]

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ATmega328P [DATASHEET]

7810D–AVR–01/15

6.

AVR CPU Core

6.1

Overview

This section discusses the AVR® core architecture in general. The main function of the CPU core is to ensure correct

program execution. The CPU must therefore be able to access memories, perform calculations, control peripherals, and

handle interrupts.

Figure 6-1.

Block Diagram of the AVR Architecture

In order to maximize performance and parallelism, the AVR uses a harvard architecture – with separate memories and

buses for program and data. Instructions in the program memory are executed with a single level pipelining. While one

instruction is being executed, the next instruction is pre-fetched from the program memory. This concept enables instructions

to be executed in every clock cycle. The program memory is in-system reprogrammable flash memory.

Status and

Control

Interrupt

Unit

32 x 8

General

Purpose

Registers

ALU

Data Bus 8-bit

Data

SRAM

SPI

Unit

Instruction

Register

Instruction

Decoder

Watchdog

Timer

Analog

Comparator

EEPROM

I/O Lines

I/O Module n

Control Lines

I/O Module 2

I/O Module 1

Program

Counter

Flash

Program

Memory

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ATMEGA328P Datasheet(PDF) 9 Page - ATMEL Corporation

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