MC68LC040RC25A Datasheet, PDF (8/442 Pages) Freescale Semiconductor, Inc – M68040 Users Manual

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