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MG80386-25/B

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产品介绍

a73 Static Intel386™ CPU Core

—Low Power Consumption

—Operating Power Supply

EXTB: 2.7 V to 3.6 V

EXTC: 4.5 V to 5.5 V

—Operating Frequency

20 MHz EXTB at 2.7 V to 3.6 V

25 MHz EXTB at 3.0 V to 3.6 V;

25/33 MHz EXTC at 4.5 V to 5.5 V

a73 Transparent Power-management System 

Architecture

—Intel System Management Mode 

Architecture Extension for Truly 

Compatible Systems

—Power Management Transparent to 

Operating Systems and Application 

Programs

—Programmable Power-management 

Modes

a73 Powerdown Mode

—Clock Stopping at Any Time

—Only 10–20 µA Typical CPU Sink 

Current

a73 Full 32-bit Internal Architecture

—8-, 16-, 32-bit Data Types

—8 General Purpose 32-bit Registers

a73 Runs Intel386 Architecture Software in a 

Cost-effective 16-bit Hardware 

Environment

—Runs Same Applications and Operating 

Systems as the Intel386 SX and Intel386 

DX Processors

—Object Code Compatible with 8086, 

80186, 80286, and Intel386 Processors

a73 High-performance 16-bit Data Bus

—Two-clock Bus Cycles

—Address Pipelining Allows Use of 

Slower, Inexpensive Memories

a73 Extended Temperature Range

a73 Integrated Memory Management Unit

—Virtual Memory Support

—Optional On-chip Paging

—4 Levels of Hardware-enforced 

Protection

—MMU Fully Compatible with MMUs of 

the 80286 and Intel386 DX Processors

a73 Virtual 8086 Mode Allows Execution of 

8086 Software in a Protected and Paged 

System

a73 Large Uniform Address Space

—64 Megabyte Physical

—64 Terabyte Virtual

—4 Gigabyte Maximum Segment Size

a73 On-chip Debugging Support Including 

Breakpoint Registers

a73 Complete System Development Support

a73 High  CHMOS Technology 

a73 Two Package Types

—132-pin Plastic Quad Flatpack

—144-pin Thin Quad Flatpack

a73 Integrated Peripheral Functions

—Clock and Power Management Unit

—Chip-select Unit

—Interrupt Control Unit

—Timer/Counter Unit

—Watchdog Timer Unit

—Asynchronous Serial I/O Unit

—Synchronous Serial I/O Unit

—Parallel I/O Unit

—DMA and Bus Arbiter Unit

—Refresh Control Unit

—JTAG-compliant Test-logic Unit

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