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MC68040RC25 Datasheet(PDF) 9 Page - Freescale Semiconductor, Inc |
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MC68040RC25 Datasheet(HTML) 9 Page - Freescale Semiconductor, Inc |
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9 / 442 page  MOTOROLA M68040 USER’S MANUAL xi TABLE OF CONTENTS (Continued) Paragraph Page Number Title Number 7.8.2.3 M68040 Synchronous DMA Arbitration ..........................................7-55 7.8.2.4 M68040 Asynchronous DMA Arbitration ........................................7-57 7.9 Bus Snooping Operation .......................................................................7-59 7.9.1 Snoop-Inhibited Cycle........................................................................7-60 7.9.2 Snoop-Enabled Cycle (No Intervention Required) ............................ 7-61 7.9.3 Snoop Read Cycle (Intervention Required) .......................................7-63 7.9.4 Snoop Write Cycle (Intervention Required) .......................................7-63 7.10 Reset Operation ....................................................................................7-65 7.11 Special Modes of Operation ..................................................................7-68 7.11.1 Output Buffer Impedance Selection ...................................................7-68 7.11.2 Multiplexed Bus Mode ....................................................................... 7-68 7.11.3 Data Latch Enable Mode ................................................................... 7-69 Section 8 Exception Processing 8.1 Exception Processing Overview ............................................................8-1 8.2 Integer Unit Exceptions ......................................................................... 8-5 8.2.1 Access Fault Exception ..................................................................... 8-6 8.2.2 Address Error Exception.................................................................... 8-8 8.2.3 Instruction Trap Exception .................................................................8-8 8.2.4 Illegal Instruction and Unimplemented Instruction Exceptions .......... 8-9 8.2.5 Privilege Violation Exception ............................................................. 8-9 8.2.6 Trace Exception .................................................................................8-10 8.2.7 Format Error Exception .....................................................................8-11 8.2.8 Breakpoint Instruction Exception ....................................................... 8-12 8.2.9 Interrupt Exception ............................................................................8-12 8.2.10 Reset Exception.................................................................................8-17 8.3 Exception Priorities ...............................................................................8-19 8.4 Return From Exceptions........................................................................8-20 8.4.1 Four-Word Stack Frame (Format $0) ................................................8-21 8.4.2 Four-Word Throwaway Stack Frame (Format $1) ............................. 8-21 8.4.3 Six-Word Stack Frame (Format $2) ...................................................8-22 8.4.4 Floating-Point Post-Instruction Stack Frame (Format $3) ................. 8-23 8.4.5 Eight-Word Stack Frame (Format $4)................................................8-23 8.4.6 Access Error Stack Frame (Format $7) .............................................8-24 8.4.6.1 Effective Address ...........................................................................8-24 8.4.6.2 Special Status Word (SSW) ...........................................................8-24 8.4.6.3 Write-Back Status .......................................................................... 8-26 8.4.6.4 Fault Address .................................................................................8-26 Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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