电气工程及其自动化专业_外文文献_英文文献_外文翻译_plc方面.pdf

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1、外文原文

A:FundamentalsofSingle-chipMicrocomputer

Thesingle-chipmicrocomputeristheculminationofboth

thedevelopmentofthedigitalcomputerandtheintegrated

circuitarguablythetowmostsignificantinventionsofthe20th

century[1].

Thesetowtypesofarchitecturearefoundinsingle-chip

microcomputer.Someemploythesplitprogram/datamemoryofthe

Harvardarchitecture,showninFig.3-5A-1,othersfollowthe

philosophy,widelyadaptedforgeneral-purposecomputersand

microprocessors,ofmakingnologicaldistinctionbetween

programanddatamemoryasinthePrincetonarchitecture,shown

inFig.3-5A-2.

Ingeneraltermsasingle-chipmicrocomputeris

characterizedbytheincorporationofalltheunitsofacomputer

intoasingledevice,asshowninFig3-5A-3.

Program

memoryInput

Output

CPU

unit

Data