N386SX 데이터 시트보기 (PDF) - Intel
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N386SX Datasheet PDF : 47 Pages
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Intel387TM SX Math CoProcessor
CONTENTS
PAGE
1 0 PIN ASSIGNMENT
5
1 1 Pin Description Table
6
2 0 FUNCTIONAL DESCRIPTION
7
2 1 Feature List
7
2 2 Math CoProcessor Architecture
7
2 3 Power Management
8
2 3 1 Dynamic Mode
8
2 3 2 Idle Mode
8
2 4 Compatibility
8
2 5 Performance
8
3 0 PROGRAMMING INTERFACE
9
3 1 Instruction Set
9
3 1 1 Data Transfer Instructions
9
3 1 2 Arithmetic Instructions
9
3 1 3 Comparison Instructions
10
3 1 4 Transcendental
Instructions
10
3 1 5 Load Constant Instructions
10
3 1 6 Processor Instructions
11
3 2 Register Set
11
3 2 1 Status Word (SW) Register
12
3 2 2 Control Word (CW)
Register
15
3 2 3 Data Register
16
3 2 4 Tag Word (TW) Register
16
3 2 5 Instruction and Data
Pointers
16
3 3 Data Types
18
3 4 Interrupt Description
18
3 5 Exception Handling
18
3 6 Initialization
21
3 7 Processing Modes
21
3 8 Programming Support
21
CONTENTS
PAGE
4 0 HARDWARE SYSTEM
INTERFACE
21
4 1 Signal Description
22
4 1 1 Intel386 CPU Clock 2
(CPUCLK2)
22
4 1 2 Intel387 Math CoProcessor
Clock 2 (NUMCLK2)
22
4 1 3 Clocking Mode (CKM)
23
4 1 4 System Reset (RESETIN)
23
4 1 5 Processor Request
(PEREQ)
23
4 1 6 Busy Status (BUSY )
23
4 1 7 Error Status (ERROR )
23
4 1 8 Data Pins (D15–D0)
23
4 1 9 Write Read Bus Cycle
(W R )
23
4 1 10 Address Stobe (ADS )
23
4 1 11 Bus Ready Input
(READY )
24
4 1 12 Ready Output
(READYO )
24
4 1 13 Status Enable (STEN)
24
4 1 14 Math CoProcessor Select 1
(NPS1 )
24
4 1 15 Math CoProcessor Select 2
(NPS2)
24
4 1 16 Command (CMD0 )
24
4 1 17 System Power (VCC)
24
4 1 18 System Ground (VSS)
24
4 2 System Configuration
25
4 3 Math CoProcessor Architecture
26
4 3 1 Bus Control Logic
26
4 3 2 Data Interface and Control
Unit
26
4 3 3 Floating Point Unit
26
4 3 4 Power Management Unit
26
2
2
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