MC68020 datasheet(3/306 Pages) MOTOROLA

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MC68020 データシート(PDF) 3 Page - Motorola, Inc

部品番号	MC68020

部品情報	MICROPROCESSORS USERS MANUAL

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メーカー	MOTOROLA [Motorola, Inc]

ホームページ	http://www.freescale.com

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SECTION 1: OVERVIEW

UM Rev 1

MOTOROLA

M68020 USER’S MANUAL

vii

TABLE OF CONTENTS

Paragraph

Page

Number

Title

Number

Section 1

Introduction

1.1

Features ..................................................................................................1-2

1.2

Programming Model ................................................................................1-4

1.3

Data Types and Addressing Modes Overview ........................................1-8

1.4

Instruction Set Overview .........................................................................1-10

1.5

Virtual Memory and Virtual Machine Concepts .......................................1-10

1.5.1

Virtual Memory ....................................................................................1-10

1.5.2

Virtual Machine ....................................................................................1-12

1.6

Pipelined Architecture .............................................................................1-12

1.7

Cache Memory ........................................................................................1-13

Section 2

Processing States

2.1

Privilege Levels .......................................................................................2-2

2.1.1

Supervisor Privilege Level ...................................................................2-2

2.1.2

User Privilege Level .............................................................................2-3

2.1.3

Changing Privilege Level ..................................................................... 2-3

2.2

Address Space Types .............................................................................2-4

2.3

Exception Processing..............................................................................2-5

2.3.1

Exception Vectors ................................................................................2-5

2.3.2

Exception Stack Frame .......................................................................2-6

Section 3

Signal Description

3.1

Signal Index ............................................................................................3-2

3.2

Function Code Signals (FC2–FC0) .........................................................3-2

3.3

Address Bus (A31–A0, MC68020)(A23–A0, MC68EC020) ....................3-2

3.4

Data Bus (D31–D0) .................................................................................3-2

3.5

Transfer Size Signals (SIZ1, SIZ0) .........................................................3-2

3.6

Asynchronous Bus Control Signals .........................................................3-4

3.7

Interrupt Control Signals..........................................................................3-5

3.8

Bus Arbitration Control Signals ...............................................................3-6

3.9

Bus Exception Control Signals ................................................................3-6

3.10

Emulator Support Signal .........................................................................3-7

3.11

Clock (CLK) .............................................................................................3-7

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