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SECTION 1: OVERVIEW
UM Rev.1.0
Freescale Semiconductor, Inc.
LIST OF ILLUSTRATIONS (Continued)
Figure
Page
Number
Title
Number
4-5
4-6
4-7
4-8
MC68340 Crystal Oscillator..................................................................................4-10
Clock Block Diagram for External Oscillator Operation...................................4-11
Full Interrupt Request Multiplexer........................................................................4-16
SIM40 Programming Model..................................................................................4-19
5-1
5-2
5-3
5-4
5-5
5-6
5-7
5-8
5-9
CPU32 Block Diagram...........................................................................................5-3
Loop Mode Instruction Sequence.......................................................................5-3
User Programming Model.....................................................................................5-9
Supervisor Programming Model Supplement..................................................5-9
Status Register........................................................................................................5-10
Instruction Word General Format.........................................................................5-12
Table Example 1.....................................................................................................5-30
Table Example 2.....................................................................................................5-31
Table Example 3.....................................................................................................5-33
5-10 Exception Stack Frame..........................................................................................5-42
5-11 Reset Operation Flowchart....................................................................................5-45
5-12 Format $0—Four-Word Stack Frame..................................................................5-60
5-13 Format $2—Six-Word Stack Frame....................................................................5-60
5-14 Internal Transfer Count Register..........................................................................5-61
5-15 Format $C—BERR Stack for Prefetches and Operands..................................5-62
5-16 Format $C—BERR Stack on MOVEM Operand................................................5-62
5-17 Format $C—Four- and Six-Word BERR Stack..................................................5-63
5-18 In-Circuit Emulator Configuration ........................................................................5-64
5-19 Bus State Analyzer Configuration.......................................................................5-64
5-20 BDM Block Diagram...............................................................................................5-65
5-21 BDM Command Execution Flowchart.................................................................5-68
5-22 Debug Serial I/O Block Diagram..........................................................................5-70
5-23 Serial Interface Timing Diagram..........................................................................5-71
5-24 BKPT Timing for Single Bus Cycle......................................................................5-72
5-25 BKPT Timing for Forcing BDM .............................................................................5-72
5-26 BKPT/DSCLK Logic Diagram..............................................................................5-72
5-27 Command-Sequence Diagram............................................................................5-75
5-28 Functional Model of Instruction Pipeline............................................................5-87
5-29 Instruction Pipeline Timing Diagram...................................................................5-88
5-30 Block Diagram of Independent Resources ........................................................5-90
5-31 Simultaneous Instruction Execution....................................................................5-91
5-32 Attributed Instruction Times...................................................................................5-92
5-33 Example 1—Instruction Stream ...........................................................................5-95
5-34 Example 2—Branch Taken...................................................................................5-95
5-35 Example 2—Branch Not Taken............................................................................5-96
5-36 Example 3—Branch Negative Tail......................................................................5-96
xviii
MC68340 USER'S MANUAL
MOTOROLA
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