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PDF MC68EC020 Data sheet ( Hoja de datos )
| Número de pieza | MC68EC020 | |
| Descripción | (MC68020 / MC68EC020) MICROPROCESSORS USERS MANUAL | |
| Fabricantes | Motorola Semiconductors | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MC68EC020 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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MC68020
MC68EC020
MICROPROCESSORS
USER’S MANUAL
First Edition
Motorola reserves the right to make changes without further notice to any products herein to improve reliability, function or design. Motorola does not assume any
liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of
others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other
applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal
injury or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold
Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney
fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that
Motorola was negligent regarding the design or manufacture of the part. Motorola and the are registered trademarks of Motorola, Inc. Motorola, Inc. is an
Equal Opportunity/Affirmative Action Employer.
© MOTOROLA INC., 1992
1 page  
9/29/95
SECTION 1: OVERVIEW
UM Rev 1
TABLE OF CONTENTS (Continued)
Paragraph
Number
Title
Page
Number
5.5.2
5.5.3
5.5.4
5.6
5.7
5.7.1
5.7.1.1
5.7.1.2
5.7.1.3
5.7.1.4
5.7.2
5.7.2.1
5.7.2.2
5.7.2.3
5.8
Retry Operation ...................................................................................5-56
Halt Operation......................................................................................5-60
Double Bus Fault .................................................................................5-60
Bus Synchronization................................................................................5-62
Bus Arbitration .........................................................................................5-62
MC68020 Bus Arbitration ....................................................................5-63
Bus Request (MC68020) .................................................................5-66
Bus Grant (MC68020) ......................................................................5-66
Bus Grant Acknowledge (MC68020) ...............................................5-66
Bus Arbitration Control (MC68020) ..................................................5-67
MC68EC020 Bus Arbitration ...............................................................5-70
Bus Request (MC68EC020) ............................................................5-71
Bus Grant (MC68EC020) .................................................................5-71
Bus Arbitration Control (MC68EC020) .............................................5-73
Reset Operation ......................................................................................5-76
6.1
6.1.1
6.1.2
6.1.3
6.1.4
6.1.5
6.1.6
6.1.7
6.1.8
6.1.9
6.1.10
6.1.11
6.1.12
6.2
6.2.1
6.2.2
6.2.3
6.3
6.4
Section 6
Exception Processing
Exception Processing Sequence ............................................................6-1
Reset Exception...................................................................................6-4
Bus Error Exception .............................................................................6-4
Address Error Exception......................................................................6-6
Instruction Trap Exception ...................................................................6-6
Illegal Instruction and Unimplemented Instruction Exceptions ............ 6-7
Privilege Violation Exception ...............................................................6-8
Trace Exception ...................................................................................6-9
Format Error Exception .......................................................................6-10
Interrupt Exceptions .............................................................................6-11
Breakpoint Instruction Exception .........................................................6-17
Multiple Exceptions..............................................................................6-17
Return from Exception .........................................................................6-19
Bus Fault Recovery .................................................................................6-21
Special Status Word (SSW).................................................................6-21
Using Software to Complete the Bus Cycles .......................................6-23
Completing the Bus Cycles with RTE ..................................................6-24
Coprocessor Considerations ...................................................................6-25
Exception Stack Frame Formats .............................................................6-25
MOTOROLA
M68020 USER’S MANUAL
ix
5 Page 
9/29/95
SECTION 1: OVERVIEW
UM Rev 1
LIST OF ILLUSTRATIONS (Continued)
Figure
Number
Title
Page
Number
5-24
5-25
5-26
5-27
5-28
5-29
5-30
5-31
5-32
5-33
5-34
5-35
5-36
5-37
5-38
5-39
5-40
5-41
5-42
5-43
5-44
5-45
5-46
5-47
5-48
5-49
5-50
5-51
5-52
Write Cycle Flowchart ......................................................................................5-33
Read-Write-Read Cycles—32-Bit Port .............................................................5-34
Byte and Word Write Cycles—32-Bit Port ........................................................5-35
Long-Word Operand Write—8-Bit Port ............................................................5-36
Long-Word Operand Write—16-Bit Port...........................................................5-37
Read-Modify-Write Cycle Flowchart .................................................................5-40
Byte Read-Modify-Write Cycle—32-Bit Port (TAS Instruction) ........................ 5-41
MC68020/EC020 CPU Space Address Encoding ............................................5-45
Interrupt Acknowledge Cycle Flowchart ...........................................................5-46
Interrupt Acknowledge Cycle Timing................................................................5-47
Autovector Operation Timing ...........................................................................5-49
Breakpoint Acknowledge Cycle Flowchart .......................................................5-50
Breakpoint Acknowledge Cycle Timing ............................................................5-51
Breakpoint Acknowledge Cycle Timing (Exception Signaled) ..........................5-52
Bus Error without DSACK1/DSACK0 .............................................................5-57
Late Bus Error with DSACK1/DSACK0 ..........................................................5-58
Late Retry.........................................................................................................5-59
Halt Operation Timing ......................................................................................5-61
MC68020 Bus Arbitration Flowchart for Single Request ..................................5-64
MC68020 Bus Arbitration Operation Timing for Single Request ......................5-65
MC68020 Bus Arbitration State Diagram .........................................................5-67
MC68020 Bus Arbitration Operation Timing—Bus Inactive .............................5-69
MC68EC020 Bus Arbitration Flowchart for Single Request ............................. 5-71
MC68EC020 Bus Arbitration Operation Timing for Single Request ................. 5-72
MC68EC020 Bus Arbitration State Diagram ....................................................5-73
MC68EC020 Bus Arbitration Operation Timing—Bus Inactive ........................ 5-75
Interface for Three-Wire to Two-Wire Bus Arbitration ......................................5-76
Initial Reset Operation Timing ..........................................................................5-77
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
MOTOROLA
M68020 USER’S MANUAL
xv
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