mc68ec020 Freescale Semiconductor, Inc, mc68ec020 Datasheet - Page 3

• Manufacturer Part Number: mc68ec020
• Description: Microprocessors
• Manufacturer: Freescale Semiconductor, Inc

9/29/95
Paragraph
1.1
1.2
1.3
1.4
1.5
1.5.1
1.5.2
1.6
1.7
2.1
2.1.1
2.1.2
2.1.3
2.2
2.3
2.3.1
2.3.2
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
3.10
3.11
MOTOROLA
Number
Features .................................................................................................. 1-2
Programming Model ................................................................................ 1-4
Data Types and Addressing Modes Overview ........................................ 1-8
Instruction Set Overview ......................................................................... 1-10
Virtual Memory and Virtual Machine Concepts ....................................... 1-10
Pipelined Architecture ............................................................................. 1-12
Cache Memory ........................................................................................ 1-13
Privilege Levels ....................................................................................... 2-2
Address Space Types ............................................................................. 2-4
Exception Processing.............................................................................. 2-5
Signal Index ............................................................................................ 3-2
Function Code Signals (FC2–FC0) ......................................................... 3-2
Address Bus (A31–A0, MC68020)(A23–A0, MC68EC020) .................... 3-2
Data Bus (D31–D0) ................................................................................. 3-2
Transfer Size Signals (SIZ1, SIZ0) ......................................................... 3-2
Asynchronous Bus Control Signals ......................................................... 3-4
Interrupt Control Signals.......................................................................... 3-5
Bus Arbitration Control Signals ............................................................... 3-6
Bus Exception Control Signals ................................................................ 3-6
Emulator Support Signal ......................................................................... 3-7
Clock (CLK) ............................................................................................. 3-7
Supervisor Privilege Level ................................................................... 2-2
User Privilege Level ............................................................................. 2-3
Changing Privilege Level ..................................................................... 2-3
Exception Stack Frame ....................................................................... 2-6
Virtual Memory .................................................................................... 1-10
Virtual Machine .................................................................................... 1-12
Exception Vectors ................................................................................ 2-5
TABLE OF CONTENTS
SECTION 1: OVERVIEW
M68020 USER’S MANUAL
Signal Description
Processing States
Introduction
Section 1
Section 2
Section 3
Title
UM Rev 1
Number
Page
vii