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MC68020RP25 Datasheet(PDF) 5 Page - Motorola, Inc |
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MC68020RP25 Datasheet(HTML) 5 Page - Motorola, Inc |
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5 / 306 page  9/29/95 SECTION 1: OVERVIEW UM Rev 1 MOTOROLA M68020 USER’S MANUAL ix TABLE OF CONTENTS (Continued) Paragraph Page Number Title Number 5.5.2 Retry Operation ...................................................................................5-56 5.5.3 Halt Operation......................................................................................5-60 5.5.4 Double Bus Fault .................................................................................5-60 5.6 Bus Synchronization................................................................................5-62 5.7 Bus Arbitration .........................................................................................5-62 5.7.1 MC68020 Bus Arbitration ....................................................................5-63 5.7.1.1 Bus Request (MC68020) .................................................................5-66 5.7.1.2 Bus Grant (MC68020) ......................................................................5-66 5.7.1.3 Bus Grant Acknowledge (MC68020) ...............................................5-66 5.7.1.4 Bus Arbitration Control (MC68020) ..................................................5-67 5.7.2 MC68EC020 Bus Arbitration ...............................................................5-70 5.7.2.1 Bus Request (MC68EC020) ............................................................5-71 5.7.2.2 Bus Grant (MC68EC020) .................................................................5-71 5.7.2.3 Bus Arbitration Control (MC68EC020) .............................................5-73 5.8 Reset Operation ......................................................................................5-76 Section 6 Exception Processing 6.1 Exception Processing Sequence ............................................................6-1 6.1.1 Reset Exception...................................................................................6-4 6.1.2 Bus Error Exception .............................................................................6-4 6.1.3 Address Error Exception......................................................................6-6 6.1.4 Instruction Trap Exception ...................................................................6-6 6.1.5 Illegal Instruction and Unimplemented Instruction Exceptions ............ 6-7 6.1.6 Privilege Violation Exception ...............................................................6-8 6.1.7 Trace Exception ...................................................................................6-9 6.1.8 Format Error Exception .......................................................................6-10 6.1.9 Interrupt Exceptions .............................................................................6-11 6.1.10 Breakpoint Instruction Exception .........................................................6-17 6.1.11 Multiple Exceptions..............................................................................6-17 6.1.12 Return from Exception .........................................................................6-19 6.2 Bus Fault Recovery .................................................................................6-21 6.2.1 Special Status Word (SSW).................................................................6-21 6.2.2 Using Software to Complete the Bus Cycles .......................................6-23 6.2.3 Completing the Bus Cycles with RTE ..................................................6-24 6.3 Coprocessor Considerations ...................................................................6-25 6.4 Exception Stack Frame Formats .............................................................6-25 |
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