Motorola MC68020 User Manual page 11

9/29/95
LIST OF ILLUSTRATIONS (Continued)
Figure
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
Bus Error without DSACK1/DSACK0 ............................................................. 5-57
5-38
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
Assertion of IPEND (MC68020 Only) ............................................................... 6-14
6-4
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
MOTOROLA
SECTION 1: OVERVIEW
Title
M68020 USER'S MANUAL
UM Rev 1
Page
Number
xv