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MC68EC040RC33B Datasheet(PDF) 8 Page - Motorola, Inc

Part # MC68EC040RC33B
Description  M68000-compatible, high-performance, 32-bit microprocessors
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Manufacturer  MOTOROLA [Motorola, Inc]
Direct Link  http://www.freescale.com
Logo MOTOROLA - Motorola, Inc

MC68EC040RC33B Datasheet(HTML) 8 Page - Motorola, Inc

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M68040 USER’S MANUAL
MOTOROLA
TABLE OF CONTENTS (Continued)
Paragraph
Page
Number
Title
Number
6.2.2
HIGHZ ............................................................................................... 6-4
6.2.3
SAMPLE/PRELOAD.......................................................................... 6-4
6.2.4
DRVCTL.T ......................................................................................... 6-4
6.2.5
SHUTDOWN .....................................................................................6-5
6.2.6
PRIVATE ........................................................................................... 6-5
6.2.7
DRVCTL.S......................................................................................... 6-5
6.2.8
BYPASS ............................................................................................ 6-6
6.3
Boundary Scan Register ....................................................................... 6-6
6.4
Restrictions ...........................................................................................6-12
6.5
Disabling The IEEE Standard 1149.1A Operation ................................ 6-13
6.6
Motorola M68040 BSDL Description (Version 2.2) ............................... 6-15
6.7
MC68040, MC68LC040, MC68EC040
JTAG Electrical Characteristics ..........................................................6-21
Section 7
Bus Operation
7.1
Bus Characteristics ............................................................................... 7-1
7.2
Data Transfer Mechanism..................................................................... 7-3
7.3
Misaligned Operands ............................................................................ 7-6
7.4
Processor Data Transfers ..................................................................... 7-9
7.4.1
Byte, Word, and Long-Word Read Transfers .................................... 7-10
7.4.2
Line Read Transfer ............................................................................7-12
7.4.3
Byte, Word, and Long-Word Write Transfers .................................... 7-20
7.4.4
Line Write Transfers .......................................................................... 7-22
7.4.5
Read-Modify-Write Transfers (Locked Transfers) ............................. 7-26
7.5
Acknowledge Bus Cycles ......................................................................7-29
7.5.1
Interrupt Acknowledge Bus Cycles ....................................................7-29
7.5.1.1
Interrupt Acknowledge BUS Cycle (Terminated Normally) ............ 7-31
7.5.1.2
Autovector Interrupt Acknowledge bus Cycle ................................ 7-33
7.5.1.3
Spurious Interrupt Acknowledge Bus Cycle................................... 7-34
7.5.2
Breakpoint Interrupt Acknowledge Bus Cycle ....................................... 7-35
7.6
Bus Exception Control Cycles............................................................... 7-36
7.6.1
Bus Errors ......................................................................................... 7-37
7.6.2
Retry Operation ................................................................................. 7-41
7.6.3
Double Bus Fault ............................................................................... 7-43
7.7
Bus Synchronization ............................................................................. 7-43
7.8
Bus Arbitration And Examples .............................................................. 7-44
7.8.1
Bus Arbitration ................................................................................... 7-45
7.8.2
Bus Arbitration Examples .................................................................. 7-52
7.8.2.1
Dual M68040 Fairness Arbitration .................................................7-52
7.8.2.2
Dual M68040 Prioritized Arbitration ............................................... 7-54
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com


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