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MC68LC040FE25B Datasheet(PDF) 8 Page - Freescale Semiconductor, Inc |
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MC68LC040FE25B Datasheet(HTML) 8 Page - Freescale Semiconductor, Inc |
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8 / 442 page  x 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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