Intel 80386 User Manual

SYSTEM OVERVIEW
82384
CLOCK
GENERATOR
CLK2
l
80386 80387
MICRO-
--
NUMERIC
PROCESSOR COPROCESSOR
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V
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80386 LOCAL BUS
\
,
A
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82385
82380
CACHE
--
CACHE
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CONTROLLER
DMA
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~
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V V'
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SYSTEM BUS
,
A
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MEMORY PERIPHERALS
G30107
Figure 1-1. 80386 System Block Diagram
1-2

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