Intel 80386 User Manual

TABLE OF CONTENTS
Figure Title Page
A-3 PAL-1 Equations ..................................................................................... A-14
A-4 PAL-2 Equations ..................................................................................... A-15
B-1 80387 Emulator PAL Equations ............................................................. B-1
C-1 PAL Sampling Edges .............................................................................. C-1
C-2 3-CLK DRAM State PAL Equations ........................................................ C-3
C-3 2-CLK DRAM State PAL Equations ........................................................ C-8
C-4
3-CLK DRAM Control PAL Equations .................................................... C-15
C-5 2-CLK DRAM Control PAL Equations .................................................... C-17
C-6 Refresh Interval Counter PAL Equations .............................. ........ .......... C-20
C-7 Refresh Address Counter PAL Equations .............................................. C-23
C-8 DRAM Circuit Timing Diagram ............................. ,.................................. C-26
Tables
Table Title Page
1-1 80386 System Components ................................................................... 1-1
3-1 Summary of 80386 Signal Pins .............................................................. 3-3
3-2 Bus
Cycle Definitions .............................................................................. 3-4
3-3
Possible Data Transfers on 32-Bit Bus ................................................... 3-10
3-4 Misaligned Data Transfers on 32-Bit Bus ............................................... 3-13
3-5 Generation of BHE#, BLE#,
and A1 from Byte Enables ....................... 3-23
3-6 Byte
Enables during BS16 Cycles ...... ............................... ................. .... 3-23
3-7
Output Pin States during RESET ...................................... .......... ........... 3-39
4-1 80386 Performance with Wait States and Pipelining .............................. 4-1
4-2 Performance versus Wait States and Operating Frequency ................... 4-3
6-1 Bus Cycles Generated by Bus Controller ............................................... 6-6
6-2 DRAM Memory Performance .................................................................. 6-16
6-3 Designs for
Six DRAM Types ................................................................. 6-28
7-1 Cache Hit Rates ..................................................................................... 7-13
8-1 Data Lines for 8-Bit I/O Addresses ......................................................... 8-2
8-2 Timings for Peripherals using Basic
I/O Interface ................................... 8-13
8-3
AO, A1, and BHE# Truth Table .............................................................. 8-20
9-1 MUL TIBUS® I Timing Parameters .......................................................... 9-10
C-1 DRAM State PAL Pin Description ............................. ,............................. C-2
C-2 DRAM Control PAL Pin Description ............ ............................................ C-14
C-3 Refresh Interval Counter PAL Pin Description ........................................ C-19
C-4 Refresh Address Counter PAL Pin Description ....................................... C-22
C-5 DRAM Circuit Timing Parameters ........................................................... C-27
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Intel 80386 Specifications

General

Clock Speed	12 MHz to 40 MHz
Transistor Count	275, 000
Addressable Memory	4 GB
Data Bus Width	32-bit
Instruction Set	x86
Introduction Date	October 17, 1985
Virtual Memory	Yes
Operating Modes	Real mode, Protected mode, Virtual 8086 mode
Manufacturer	Intel
Model	80386
Address Bus Width	32-bit
Voltage	5V
Manufacturing Process	1.5 µm
Cache	No on-chip cache
FPU	Optional (80387)
Bus Interface	32-bit
Process Technology	CHMOS III
Package	PGA