MC68020 查看數據表（PDF） - Freescale Semiconductor

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MC68020

MICROPROCESSORS USER’S MANUAL

Freescale Semiconductor 

9/29/95

FrSeEeCsTcIOaNle1:SOeVmEiRcVoIEnWductor, Inc. UM Rev.1.0

LIST OF ILLUSTRATIONS

Figure

Number

Title

Page

Number

1-1 MC68020/EC020 Block Diagram .....................................................................1-3

1-2 User Programming Model ................................................................................1-5

1-3 Supervisor Programming Model Supplement .................................................. 1-6

1-4 Status Register (SR) ........................................................................................ 1-7

1-5 Instruction Pipe ................................................................................................1-13

2-1 General Exception Stack Frame ...................................................................... 2-6

3-1 Functional Signal Groups .................................................................................3-1

4-1 MC68020/EC020 On-Chip Cache Organization ..............................................4-2

4-2 Cache Control Register ....................................................................................4-3

4-3 Cache Address Register .................................................................................. 4-4

5-1

5-2

5-3

5-4

5-5

5-6

5-7

5-8

5-9

5-10

5-11

5-12

5-13

5-14

5-15

5-16

5-17

5-18

5-19

5-20

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5-22

5-23

Relationship between External and Internal Signals........................................ 5-2

Input Sample Window ......................................................................................5-2

Internal Operand Representation .....................................................................5-6

MC68020/EC020 Interface to Various Port Sizes ............................................5-6

Long-Word Operand Write to Word Port Example........................................... 5-10

Long-Word Operand Write to Word Port Timing ..............................................5-11

Word Operand Write to Byte Port Example ..................................................... 5-12

Word Operand Write to Byte Port Timing.........................................................5-13

Misaligned Long-Word Operand Write to Word Port Example ........................ 5-14

Misaligned Long-Word Operand Write to Word Port Timing............................ 5-15

Misaligned Long-Word Operand Read from Word Port Example .................... 5-16

Misaligned Word Operand Write to Word Port Example.................................. 5-16

Misaligned Word Operand Write to Word Port Timing ..................................... 5-17

Misaligned Word Operand Read from Word Bus Example .............................. 5-18

Misaligned Long-Word Operand Write to Long-Word Port Example ............... 5-18

Misaligned Long-Word Operand Write to Long-Word Port Timing .................. 5-19

Misaligned Long-Word Operand Read from Long-Word Port Example ........... 5-20

Byte Enable Signal Generation for 16- and 32-Bit Ports ................................ .. 5-23

Long-Word Read Cycle Flowchart ................................................................... 5-26

Byte Read Cycle Flowchart ..............................................................................5-27

Byte and Word Read Cycles—32-Bit Port ....................................................... 5-28

Long-Word Read—8-Bit Port ...........................................................................5-29

Long-Word Read—16- and 32-Bit Ports .......................................................... 5-30

xiv

M68020 USER’S MANUAL

MOTOROLA

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