ATMEGA325P_06 datasheet(11/336 Pages) ATMEL

部件名	ATMEGA325P

功能描述	8-bit Microcontroller with 32K Bytes In-System Programmable Flash

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制造商	ATMEL [ATMEL Corporation]

网页	http://www.atmel.com

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11

8023A–AVR–12/06

ATmega325P/3250P

5.

AVR CPU Core

5.1

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.

5.2

Architectural Overview

Figure 5-1.

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 instruc-

tion 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.

The fast-access Register File contains 32 x 8-bit general purpose working registers with a single

clock cycle access time. This allows single-cycle Arithmetic Logic Unit (ALU) operation. In a typ-

Flash

Program

Memory

Instruction

Register

Instruction

Decoder

Program

Counter

Control Lines

32 x 8

General

Purpose

Registrers

ALU

Status

and Control

I/O Lines

EEPROM

Data Bus 8-bit

Data

SRAM

Interrupt

Unit

SPI

Unit

Watchdog

Timer

Analog

Comparator

I/O Module 2

I/O Module1

I/O Module n

类似零件编号 - ATMEGA325P_06

制造商	部件名	数据表	功能描述
ATMEL Corporation	ATMEGA325P	449Kb / 24P	8-bit Microcontroller with 32K Bytes In-System Programmable Flash
	ATMEGA325P	332Kb / 22P	8-bit Microcontroller with 32K Bytes In-System Programmable Flash
	ATMEGA325P	503Kb / 25P	8-bit Microcontroller with 32K Bytes In-System Programmable Flash

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类似说明 - ATMEGA325P_06

制造商	部件名	数据表	功能描述
ATMEL Corporation	ATMEGA325P	332Kb / 22P	8-bit Microcontroller with 32K Bytes In-System Programmable Flash
	ATMEGA329P	471Kb / 25P	8-bit Microcontroller with 32K Bytes In-System Programmable Flash
	ATMEGA324PA	546Kb / 24P	8-bit Microcontroller with 32K Bytes In-System Programmable Flash
	ATMEGA32A	427Kb / 18P	8-bit Microcontroller with 32K Bytes In-System Programmable Flash
	ATMEGA325P	346Kb / 25P	8-bit Microcontroller with 32K Bytes In-System Programmable Flash
	ATMEGA32	5Mb / 346P	8-bit Microcontroller with 32K Bytes In-System Programmable Flash
	ATMEGA329P	5Mb / 385P	8-bit Microcontroller with 32K Bytes In-System Programmable Flash
	ATMEGA32A	518Kb / 18P	8-bit Microcontroller with 32K Bytes In-System Programmable Flash
	ATMEGA328P	5Mb / 345P	8-bit Microcontroller with 32K Bytes In-System Programmable Flash
	ATMEGA32A	6Mb / 352P	8-bit Microcontroller with 32K Bytes In-System Programmable Flash

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ATMEGA325P 数据表(PDF) 11 Page - ATMEL Corporation

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