INTRODUCTION

The Intel386 SX Microprocessor is 100 object code compatible with the Intel386 DX, 286 and 8086 microprocessors. Systems based on the Intel386 SX CPU can access the world’s largest existing microcomputer software base, including the growing 32-bit software base.

■ Full 32-Bit Internal Architecture

— 8-, 16-, 32-Bit Data Types

— 8 General Purpose 32-Bit Registers

■ Runs Intel386TM Software in a Cost Effective 16-Bit Hardware Environment

— Runs Same Applications and O.S.’s as the Intel386TM DX Processor

— Object Code Compatible with 8086, 80186, 80286, and Intel386TM Processors

■ High Performance 16-Bit Data Bus

— 16, 20, 25 and 33 MHz Clock

— Two-Clock Bus Cycles

— Address Pipelining Allows Use of Slower/Cheaper Memories

■ Integrated Memory Management Unit

— Virtual Memory Support

— Optional On-Chip Paging

— 4 Levels of Hardware Enforced Protection

— MMU Fully Compatible with Those of the 80286 and Intel386 DX CPUs

■ Virtual 8086 Mode Allows Execution of 8086 Software in a Protected and Paged System

■ Large Uniform Address Space

— 16 Megabyte Physical

— 64 Terabyte Virtual

— 4 Gigabyte Maximum Segment Size

■ Numerics Support with the Intel387TM SX Math CoProcessor

■ On-Chip Debugging Support Including Breakpoint Registers

■ Complete System Development Support

— Software: C, PL/M, Assembler

— Debuggers: PMON-386 DX, ICETM-386 SX

■ High Speed CHMOS IV Technology

■ Operating Frequency:

— Standard

(Intel386 SX -33, -25, -20, -16) Min/Max Frequency (4/33, 4/25, 4/20, 4/16) MHz

— Low Power

(Intel386 SX -33, -25, -20, -16, -12) Min/Max Frequency (2/33, 2/25, 2/20, 2/16, 2/12) MHz

■ 100-Pin Plastic Quad Flatpack Package