Table of Contents
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LIST OF ILLUSTRATIONS
Figure
Page
Number
Title
Number
Figure 1-1. MC68306 Simplified Block Diagram....................................................... 1-1
Figure 2-1. MC68306 Detailed Block Diagram ......................................................... 2-2
Figure 3-1. Word Read Cycle Flowchart .................................................................. 3-2
Figure 3-2. Byte Read Cycle Flowchart .................................................................... 3-2
Figure 3-3. Read and Write Cycle Timing Diagram .................................................. 3-3
Figure 3-4. Word and Byte Read Cycle Timing Diagram ......................................... 3-3
Figure 3-5. Word Write Cycle Flowchart ................................................................... 3-5
Figure 3-6. Byte Write Cycle Flowchart .................................................................... 3-6
Figure 3-7. Word and Byte Write Cycle Timing Diagram.......................................... 3-6
Figure 3-8. Read-Modify-Write Cycle Flowchart ....................................................... 3-8
Figure 3-9. Read-Modify-Write Cycle Timing Diagram ............................................. 3-9
Figure 3-10. Interrupt Acknowledge Cycle ............................................................... 3-11
Figure 3-11. Interrupt Acknowledge Cycle Timing Diagram ..................................... 3-12
Figure 3-12. Three-Wire Bus Arbitration Cycle Flowchart ........................................ 3-13
Figure 3-13. Two-Wire Bus Arbitration Cycle Flowchart ........................................... 3-14
Figure 3-14. Three-Wire Bus Arbitration Timing Diagram ........................................ 3-15
Figure 3-15. Two-Wire Bus Arbitration Timing Diagram ........................................... 3-15
Figure 3-16. External Asynchronous Signal Synchronization ................................... 3-17
Figure 3-17. Bus Arbitration Unit State Diagrams..................................................... 3-19
Figure 3-19. Three-Wire Bus Arbitration Timing Diagram-Bus Inactive ................. 3-21
Figure 3-20. Three-Wire Bus Arbitration Timing Diagram-Special Case ............... 3-22
Figure 3-21. Two-Wire Bus Arbitration Timing Diagram-Processor Active ............ 3-23
Figure 3-22. Two-Wire Bus Arbitration Timing Diagram-Bus Inactive .................... 3-24
Figure 3-23. Two-Wire Bus Arbitration Timing Diagram-Special Case .................. 3-25
Figure 3-24. Bus Error Timing Diagram .................................................................... 3-26
Figure 3-25. Retry Bus Cycle Timing Diagram ......................................................... 3-27
Figure 3-26. Halt Operation Timing Diagram............................................................ 3-28
Figure 3-27. Reset Operation Timing Diagram......................................................... 3-29
Figure 3-28 Fully Asynchronous Read Cycle ........................................................... 3-32
Figure 3-29. Fully Asynchronous Write Cycle........................................................... 3-32
Figure 3-30. Pseudo-Asynchronous Read Cycle ..................................................... 3-33
Figure 3-31. Pseudo-Asynchronous Write Cycle...................................................... 3-34
Figure 3-32. Synchronous Read Cycle..................................................................... 3-36
Figure 3-33. Synchronous Write Cycle ..................................................................... 3-37
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MC68306 USER'S MANUAL
MOTOROLA
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