xxxviii
MC68030 USER’S MANUAL
MOTOROLA
LIST OF ILLUSTRATIONS (Continued)
Figure
Number
6-11
6-12
6-13
6-14
6-15
Title
Page
Number
Burst Operation Cycles and Burst Mode . . . . . . . . . . . . . . . . . . . . . . . . . . 6-17
Burst Filling Wraparound Example. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-17
Deferred Burst Filling Example. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-18
Cache Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-21
Cache Address Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-23
7-1
7-2
7-3
7-4
7-5
7-6
7-7
7-8
7-9
7-10
7-11
7-12
7-13
7-14
7-15
7-16
7-17
7-18
7-19
7-20
7-21
7-22
7-23
7-24
7-25
7-26
7-27
7-28
7-29
7-30
Relationship between External and Internal Signals . . . . . . . . . . . . . . . . . 7-2
Asynchronous Input Sample Window. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3
Internal Operand Representation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-8
MC68030 Interface to Various Port Sizes . . . . . . . . . . . . . . . . . . . . . . . . . 7-9
Example of Long-Word Transfer to Word Port. . . . . . . . . . . . . . . . . . . . . . 7-11
Long-Word Operand Write Timing (16-Bit Data Port) . . . . . . . . . . . . . . . . 7-12
Example of Word Transfer to Byte Port . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-13
Word Operand Write Timing (8-Bit Data Port) . . . . . . . . . . . . . . . . . . . . . . 7-14
Misaligned Long-Word Transfer to Word Port Example. . . . . . . . . . . . . . . 7-15
Misaligned Long-Word Transfer to Word Port . . . . . . . . . . . . . . . . . . . . . . 7-16
Misaligned Cachable Long-Word Transfer from Word Port Example . . . . 7-17
Misaligned Word Transfer to Word Port Example . . . . . . . . . . . . . . . . . . . 7-17
Misaligned Word Transfer to Word Port. . . . . . . . . . . . . . . . . . . . . . . . . . . 7-18
Example of Misaligned Cachable Word Transfer from Word Bus . . . . . . . 7-20
Misaligned Long-Word Transfer to Long-Word Port. . . . . . . . . . . . . . . . . . 7-20
Misaligned Write Cycles to Long-Word Port. . . . . . . . . . . . . . . . . . . . . . . . 7-21
Misaligned Cachable Long-Word Transfer from Long-Word Bus. . . . . . . . 7-22
Byte Data Select Generation for 16- and 32-Bit Ports . . . . . . . . . . . . . . . . 7-25
Asynchronous Long-Word Read Cycle Flowchart . . . . . . . . . . . . . . . . . . . 7-32
Asynchronous Byte Read Cycle Flowchart . . . . . . . . . . . . . . . . . . . . . . . . 7-32
Asynchronous Byte and Word Read Cycles — 32-Bit Port . . . . . . . . . . . . 7-33
Long-Word Read — 8-Bit Port with CIOUT Asserted. . . . . . . . . . . . . . . . . 7-34
Long-Word Read — 16-Bit and 32-Bit Port . . . . . . . . . . . . . . . . . . . . . . . . 7-35
Asynchronous Write Cycle Flowchart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-37
Asynchronous Read-Write-Read Cycles — 32-Bit Port . . . . . . . . . . . . . . . 7-38
Asynchronous Byte and Word Write Cycles — 32-Bit Port . . . . . . . . . . . . 7-39
Long-Word Operand Write — 8-Bit Port. . . . . . . . . . . . . . . . . . . . . . . . . . . 7-40
Long-Word Operand Write — 16-Bit Port. . . . . . . . . . . . . . . . . . . . . . . . . . 7-41
Asynchronous Read-Modify-Write Cycle Flowchart. . . . . . . . . . . . . . . . . . 7-44
Asynchronous Byte Read-Modify-Write Cycle — 32-Bit Port
(TAS Instruction with CIOUT or CIIN Asserted) . . . . . . . . . . . . . . . . . . . . . 7-45
Synchronous Long-Word Read Cycle Flowchart —
No Burst Allowed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-49
Synchronous Read with CIIN Asserted and CBACK Negated. . . . . . . . . . 7-50
Synchronous Write Cycle Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-52
Synchronous Write Cycle with Wait States — CIOUT Asserted . . . . . . . . 7-53
7-31
7-32
7-33
7-34