MC68040FE25V Freescale Semiconductor, MC68040FE25V Datasheet - Page 15
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MC68040FE25V
Manufacturer Part Number
MC68040FE25V
Description
IC MICROPROCESSOR 32BIT 184-CQFP
Manufacturer
Freescale Semiconductor
Datasheet
1.MC68EC040FE33A.pdf
(442 pages)
Specifications of MC68040FE25V
Processor Type
M680x0 32-Bit
Speed
25MHz
Voltage
5V
Mounting Type
Surface Mount
Package / Case
184-CQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
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MOTOLOLA
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2-1
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2-3
2-4
2-5
3-1
3-2
3-3
3-4
3-5
3-6
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3-8
3-9
3-10
3-11
3-12
3-13
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3-17
3-18
3-19
3-20
3-21
3-22
3-23
4-1
4-2
4-3
4-4
MOTOROLA
Number
Figure
Block Diagram .............................................................................................. 1-4
Programming Model ..................................................................................... 1-7
Integer Unit Pipeline ..................................................................................... 2-2
Write-Back Cycle Block Diagram ................................................................. 2-3
Integer Unit User Programming Model......................................................... 2-4
Integer Unit Supervisor Programming Model ............................................... 2-6
Status Register............................................................................................. 2-7
Memory Management Unit ........................................................................... 3-2
Memory Management Programming Model ................................................. 3-3
URP and SRP Register Formats.................................................................. 3-4
Translation Control Register Format ............................................................ 3-4
Transparent Translation Register Format .................................................... 3-5
MMU Status Register Format....................................................................... 3-6
Translation Table Structure .......................................................................... 3-8
Logical Address Format ............................................................................... 3-9
Detailed Flowchart of Table Search Operation ............................................ 3-10
Detailed Flowchart of Descriptor Fetch Operation ....................................... 3-11
Table Descriptor Formats............................................................................. 3-13
Page Descriptor Formats ............................................................................. 3-13
Example Translation Table .......................................................................... 3-17
Translation Table Using Indirect Descriptors ............................................... 3-18
Translation Table Using Shared Tables ....................................................... 3-19
Translation Table with Nonresident Tables .................................................. 3-20
Translation Table Structure for Two Tasks .................................................. 3-24
Logical Address Map with Shared Supervisor and User Address Spaces... 3-24
Translation Table Using S-Bit and W-Bit To Set Protection ......................... 3-25
ATC Organization......................................................................................... 3-26
ATC Entry and Tag Fields ............................................................................ 3-27
Address Translation Flowchart..................................................................... 3-32
MMU Status Interpretation ........................................................................... 3-35
Overview of Internal Caches ........................................................................ 4-2
Cache Line Formats ..................................................................................... 4-3
Caching Operation ....................................................................................... 4-4
Cache Control Register ................................................................................ 4-5
Freescale Semiconductor, Inc.
LIST OF ILLUSTRATIONS
For More Information On This Product,
Go to: www.freescale.com
M68040 USER’S MANUAL
Title
Number
Page
xvii
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