MC68331VPV16 View Datasheet(PDF) - Motorola => Freescale
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Description
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MC68331VPV16 Datasheet PDF : 254 Pages
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Paragraph
TABLE OF CONTENTS
(Continued)
Title
Page
4.2.11
Periodic Interrupt Timer .......................................................................... 4-7
4.2.12
Low-Power STOP Operation .................................................................. 4-8
4.2.13
Freeze Operation ................................................................................... 4-9
4.3 System Clock ................................................................................................. 4-9
4.3.1
Clock Sources ...................................................................................... 4-10
4.3.2
Clock Synthesizer Operation ................................................................ 4-10
4.3.3
External Bus Clock ............................................................................... 4-15
4.3.4
Low-Power Operation ........................................................................... 4-15
4.3.5
Loss of Reference Signal ..................................................................... 4-16
4.4 External Bus Interface .................................................................................. 4-17
4.4.1
Bus Signals .......................................................................................... 4-18
4.4.1.1
Address Bus ................................................................................. 4-18
4.4.1.2
Address Strobe ............................................................................ 4-18
4.4.1.3
Data Bus ...................................................................................... 4-18
4.4.1.4
Data Strobe .................................................................................. 4-18
4.4.1.5
Read/Write Signal ........................................................................ 4-18
4.4.1.6
Size Signals ................................................................................. 4-18
4.4.1.7
Function Codes ............................................................................ 4-19
4.4.1.8
Data and Size Acknowledge Signals ........................................... 4-19
4.4.1.9
Bus Error Signal ........................................................................... 4-19
4.4.1.10
Halt Signal .................................................................................... 4-20
4.4.1.11
Autovector Signal ......................................................................... 4-20
4.4.2
Dynamic Bus Sizing ............................................................................. 4-20
4.4.3
Operand Alignment .............................................................................. 4-21
4.4.4
Misaligned Operands ........................................................................... 4-21
4.4.5
Operand Transfer Cases ...................................................................... 4-22
4.5 Bus Operation .............................................................................................. 4-22
4.5.1
Synchronization to CLKOUT ................................................................ 4-23
4.5.2
Regular Bus Cycles .............................................................................. 4-23
4.5.2.1
Read Cycle ................................................................................... 4-24
4.5.2.2
Write Cycle ................................................................................... 4-25
4.5.3
Fast Termination Cycles ....................................................................... 4-25
4.5.4
CPU Space Cycles ............................................................................... 4-26
4.5.4.1
Breakpoint Acknowledge Cycle .................................................... 4-27
4.5.4.2
LPSTOP Broadcast Cycle ............................................................ 4-30
4.5.5
Bus Exception Control Cycles .............................................................. 4-30
4.5.5.1
Bus Errors .................................................................................... 4-32
4.5.5.2
Double Bus Faults ........................................................................ 4-32
4.5.5.3
Retry Operation ............................................................................ 4-33
4.5.5.4
Halt Operation .............................................................................. 4-33
4.5.6
External Bus Arbitration ........................................................................ 4-34
MOTOROLA
iv
MC68331
USER’S MANUAL
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