N386SX データシートの表示（PDF） - Intel

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N386SX

Intel387™ SX MATH COPROCESSOR

Intel 

CONTENTS

PAGE

4 4 Bus Cycles

26

4 4 1 Intel387 SX Math

CoProcessor Addressing

27

4 4 2 CPU Math CoProcessor

Synchronization

27

4 4 3 Synchronous Asynchronous

Modes

27

4 4 4 Automatic Bus Cycle

Termination

27

5 0 BUS OPERATION

27

5 1 Non-pipelined Bus Cycles

28

5 1 1 Write Cycle

28

5 1 2 Read Cycle

29

5 2 Pipelined Bus Cycles

29

5 3 Mixed Bus Cycles

30

5 4 BUSY and PEREQ Timing

Relationship

32

6 0 PACKAGE SPECIFICATIONS

33

6 1 Mechanical Specifications

33

6 2 Thermal Specifications

33

CONTENTS

PAGE

7 0 ELECTRICAL

CHARACTERISTICS

33

7 1 Absolute Maximum Ratings

33

7 2 D C Characteristics

34

7 3 A C Characteristics

35

8 0 Intel387 SX MATH COPROCESSOR

INSTRUCTION SET

41

APPENDIX A Intel387 SX MATH

COPROCESSOR COMPATIBILITY A-1

A 1 8087 80287 Compatibility

A-1

A 1 1 General Differences

A-1

A 1 2 Exceptions

A-2

APPENDIX B COMPATIBILITY

BETWEEN THE 80287 AND 8087

MATH COPROCESSOR

B-1

3

3

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