MC68020 Motorola, MC68020 Datasheet - Page 10

• Manufacturer Part Number: MC68020
• Description: (MC68020 / MC68EC020) MICROPROCESSORS USERS MANUAL
• Manufacturer: Motorola

9/29/95
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Number
Figure
MC68020/EC020 Block Diagram ..................................................................... 1-3
User Programming Model ................................................................................ 1-5
Supervisor Programming Model Supplement .................................................. 1-6
Status Register (SR) ........................................................................................ 1-7
Instruction Pipe ................................................................................................ 1-13
General Exception Stack Frame ...................................................................... 2-6
Functional Signal Groups ................................................................................. 3-1
MC68020/EC020 On-Chip Cache Organization .............................................. 4-2
Cache Control Register .................................................................................... 4-3
Cache Address Register .................................................................................. 4-4
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
LIST OF ILLUSTRATIONS
SECTION 1: OVERVIEW
M68020 USER’S MANUAL
Title
UM Rev.1.0
MOTOROLA
Number
Page