Adapting The Mc68030 To Mc68020 Designs - Motorola MC68030 User Manual

LIST OF ILLUSTRATIONS (Concluded)
Figure
Number
10-38 Operand Format in Memory for Transfer to —(An) . . . . . . . . . . . . . . . . . . 10-54
10-39 Transfer Status Register and ScanPC Primitive Format . . . . . . . . . . . . . . 10-55
10-40 Take Pre-Instruction Exception Primitive Format . . . . . . . . . . . . . . . . . . . . 10-56
10-41 MC68030 Pre-Instruction Stack Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-57
10-42 Take Mid-Instruction Exception Primitive Format. . . . . . . . . . . . . . . . . . . . 10-58
10-43 MC68030 Mid-Instruction Stack Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-59
10-44 Take Post-Instruction Exception Primitive Format . . . . . . . . . . . . . . . . . . . 10-60
10-45 MC68030 Post-Instruction Stack Frame . . . . . . . . . . . . . . . . . . . . . . . . . . 10-60
11-1 Block Diagram – Eight Independent Resources. . . . . . . . . . . . . . . . . . . . . 11-3
11-2 Simultaneous Instruction Execution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-7
11-3 Derivation of Instruction Overlap Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-8
11-4 Processor Activity – Even Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-9
11-5 Processor Activity – Odd Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-10
12-1 Signal Routing for Adapting the MC68030 to MC68020 Designs . . . . . . . 12-2
12-2 32-Bit Data Bus Coprocessor Connection . . . . . . . . . . . . . . . . . . . . . . . . . 12-6
12-3 Chip-Select Generation PAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-8
12-4 PAL Equations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-8
12-5 Bus Cycle Timing Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-9
12-6 Example MC68030 Byte Select PAL System Configuration . . . . . . . . . . . 12-12
12-7 MC68030 Byte Select PAL Equations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-13
12-8 Access Time Computation Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-15
12-9 Example Two-Clock Read, Three-Clock Write Memory Bank . . . . . . . . . . 12-19
12-10 Example PAL Equations for Two-Clock Memory Bank . . . . . . . . . . . . . . . 12-20
12-11 Additional Memory Enable Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-21
12-12 Example Two-Clock Read and Write Memory Bank . . . . . . . . . . . . . . . . . 12-22
12-13 Example PAL Equation for Two-Clock Read and Write Memory Bank . . . 12-23
12-14 Example 2-1-1-1 Burst Mode Memory Bank at 20 MHz, 256K Bytes . . . . 12-25
12-15 Example 3-1-1-1 Pipelined Burst Mode Memory Bank at
20 MHz, 256K Bytes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-28
12-16 Additional Memory Enable Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-29
12-17 Example MC68030 Hardware Configuration with
External Physical Cache . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-33
12-18 Example Early Termination Control Circuit . . . . . . . . . . . . . . . . . . . . . . . . 12-34
12-19 Normal Instruction Boundaries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-37
12-20 Trace or Interrupt Exception. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-38
12-21 Other Exceptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-38
12-22 Processor Halted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-39
12-23 Trace Interface Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-41
12-24 PAL Pin Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-44
12-25 Logic Equations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-45
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Title
MC68030 USER'S MANUAL
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Number
MOTOROLA