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PDF M68040 Data sheet ( Hoja de datos )
| Número de pieza | M68040 | |
| Descripción | 32-bit microprocessors | |
| Fabricantes | Motorola Semiconductors | |
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Freescale Semiconductor, Inc.
µ MOTOROLA
M68040 User’s Manual
Including the
MC68040,
MC68040V,
MC68LC040,
MC68EC040,
and
MC68EC040V
©MOTOROLA INC., 1990
Revised 1992, 1993
For More Information On This Product,
Go to: www.freescale.com
1 page  
Freescale Semiconductor, Inc.
Paragraph
Number
TABLE OF CONTENTS (Continued)
Title
Page
Number
3.1
3.1.1
3.1.2
3.1.3
3.1.4
3.2
3.2.1
3.2.2
3.2.2.1
3.2.2.2
3.2.2.3
3.2.3
3.2.4
3.2.4.1
3.2.4.2
3.2.4.3
3.2.4.4
3.2.5
3.2.6
3.2.6.1
3.2.6.2
3.2.6.3
3.3
3.4
3.5
3.6
3.6.1
3.6.2
3.7
3.7.1
3.7.2
3.7.3
3.7.4
Section 3
Memory Management Unit
(Except MC68EC040 and MC68EC040V)
Memory Management Programming Model ..........................................3-3
User and Supervisor Root Pointer Registers..................................... 3-3
Translation Control Register ..............................................................3-4
Transparent Translation Registers .................................................... 3-5
MMU Status Register ........................................................................3-6
Logical Address Translation ..................................................................3-7
Translation Tables .............................................................................3-7
Descriptors ........................................................................................3-12
Table Descriptors ...........................................................................3-12
Page Descriptors ...........................................................................3-13
Descriptor Field Definitions ............................................................3-13
Translation Table Example ................................................................3-16
Variations in Translation Table Structure ..........................................3-16
Indirect Action ................................................................................3-16
Table Sharing Between Tasks ....................................................... 3-18
Table Paging ..................................................................................3-19
Dynamically Allocated Tables ........................................................3-21
Table Search Accesses .....................................................................3-21
Address Translation Protection .........................................................3-23
Supervisor and User Translation Tables........................................ 3-23
Supervisor Only..............................................................................3-23
Write Protect ..................................................................................3-24
Address Translation Caches .................................................................3-26
Transparent Translation ........................................................................3-29
Address Translation Summary ..............................................................3-30
MMU Effect on RSTI and MDIS ............................................................. 3-31
Effect of RSTI on the MMUs ..............................................................3-31
Effect of MDIS on Address Translation .............................................. 3-31
MMU Instructions ..................................................................................3-33
MOVEC .............................................................................................3-33
PFLUSH ................................ .............................................................3-33
PTEST ...............................................................................................3-33
Register Programming Considerations.............................................. 3-34
MOTOROLA
M68040 USER’S MANUAL
For More Information On This Product,
Go to: www.freescale.com
vii
5 Page 
Freescale Semiconductor, Inc.
TABLE OF CONTENTS (Continued)
Paragraph
Number
Title
Page
Number
9.7.5
9.7.5.1
9.7.5.2
9.7.6
9.7.7
9.8
Underflow ..........................................................................................9-33
Maskable Exception Conditions .....................................................9-34
Nonmaskable Exception Conditions .............................................. 9-34
Divide by Zero....................................................................................9-36
Inexact Result ....................................................................................9-36
Floating-Point State Frames..................................................................9-39
10.1
10.2
10.3
10.4
10.5
10.6
10.7
10.7.1
10.7.2
10.7.3
Section 10
Instruction Timings
Overview ...............................................................................................10-3
Instruction Timing Examples ................................................................. 10-5
CINV and CPUSH Instruction Timing.................................................... 10-8
MOVE Instruction Timing ...................................................................... 10-9
Miscellaneous Integer Unit Instruction Timings..................................... 10-11
Integer Unit Instruction Timings ............................................................10-13
Floating-Point Unit Instruction Timings .................................................10-29
Miscellaneous Integer Unit Support Timings ..................................... 10-29
Integer Unit Support Timings .............................................................10-30
Timings in the Floating-Point Unit ......................................................10-35
11.1
11.2
11.3
11.4
11.5
11.6
11.7
11.8
11.8.1
11.8.2
11.9
11.9.1
11.9.2
11.9.3
11.9.4
Section 11
MC68040 Electrical and Thermal Characteristics
Maximum Ratings .................................................................................11-1
Thermal Characteristics ........................................................................ 11-1
DC Electrical Specifications ..................................................................11-2
Power Dissipation .................................................................................11-2
Clock AC Timing Specifications ............................................................11-3
Output AC Timing Specifications ..........................................................11-4
Input AC Timing Specifications ............................................................. 11-5
MC68040 Thermal Device Characteristics............................................ 11-12
MC68040 Die and Package ...............................................................11-12
MC68040 Power Considerations .......................................................11-12
MC68040 Thermal Management Techniques .......................................11-14
Still Air................................................................................................11-17
Forced Air ..........................................................................................11-18
With Heat Sink ...................................................................................11-19
With Heat Sink and Forced Air ..........................................................11-22
MOTOROLA
M68040 USER’S MANUAL
For More Information On This Product,
Go to: www.freescale.com
xiii
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet M68040.PDF ] | |
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