Motorola MC68020 - Page 11

9/29/95 SECTION 1: OVERVIEW UM Rev 1
MOTOROLA M68020 USER’S MANUAL xv
LIST OF ILLUSTRATIONS (Continued)
Figure Page
Number Title Number
5-24 Write Cycle Flowchart ...................................................................................... 5-33
5-25 Read-Write-Read Cycles—32-Bit Port............................................................. 5-34
5-26 Byte and Word Write Cycles—32-Bit Port........................................................ 5-35
5-27 Long-Word Operand Write—8-Bit Port ............................................................ 5-36
5-28 Long-Word Operand Write—16-Bit Port........................................................... 5-37
5-29 Read-Modify-Write Cycle Flowchart................................................................. 5-40
5-30 Byte Read-Modify-Write Cycle—32-Bit Port (TAS Instruction) ........................ 5-41
5-31 MC68020/EC020 CPU Space Address Encoding............................................ 5-45
5-32 Interrupt Acknowledge Cycle Flowchart........................................................... 5-46
5-33 Interrupt Acknowledge Cycle Timing................................................................ 5-47
5-34 Autovector Operation Timing ........................................................................... 5-49
5-35 Breakpoint Acknowledge Cycle Flowchart ....................................................... 5-50
5-36 Breakpoint Acknowledge Cycle Timing............................................................ 5-51
5-37 Breakpoint Acknowledge Cycle Timing (Exception Signaled).......................... 5-52
5-38 Bus Error without
DSACK1/DSACK0 ............................................................. 5-57
5-39 Late Bus Error with
DSACK1/DSACK0 .......................................................... 5-58
5-40 Late Retry......................................................................................................... 5-59
5-41 Halt Operation Timing ...................................................................................... 5-61
5-42 MC68020 Bus Arbitration Flowchart for Single Request.................................. 5-64
5-43 MC68020 Bus Arbitration Operation Timing for Single Request...................... 5-65
5-44 MC68020 Bus Arbitration State Diagram......................................................... 5-67
5-45 MC68020 Bus Arbitration Operation Timing—Bus Inactive ............................. 5-69
5-46 MC68EC020 Bus Arbitration Flowchart for Single Request............................. 5-71
5-47 MC68EC020 Bus Arbitration Operation Timing for Single Request................. 5-72
5-48 MC68EC020 Bus Arbitration State Diagram .................................................... 5-73
5-49 MC68EC020 Bus Arbitration Operation Timing—Bus Inactive ........................ 5-75
5-50 Interface for Three-Wire to Two-Wire Bus Arbitration ...................................... 5-76
5-51 Initial Reset Operation Timing.......................................................................... 5-77
5-52 RESET Instruction Timing................................................................................ 5-78
6-1 Reset Operation Flowchart .............................................................................. 6-5
6-2 Interrupt Pending Procedure ............................................................................ 6-12
6-3 Interrupt Recognition Examples ....................................................................... 6-13
6-4 Assertion of
IPEND (MC68020 Only)............................................................... 6-14
6-5 Interrupt Exception Processing Flowchart........................................................ 6-15
6-6 Breakpoint Instruction Flowchart...................................................................... 6-18
6-7 RTE Instruction for Throwaway Four-Word Frame .......................................... 6-20
6-8 Special Status Word Format ............................................................................ 6-22
7-1 F-Line Coprocessor Instruction Operation Word.............................................. 7-3
7-2 Asynchronous Non-DMA M68000 Coprocessor Interface Signal Usage......... 7-5
7-3 MC68020/EC020 CPU Space Address Encodings.......................................... 7-6