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c单片机论文英文文献翻译.pdf

发布:2024-07-26约2.44万字共22页下载文档
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英文原文

Description

TheAT89C51isalow-power,high-performanceCMOS8-bit

microcomputerwith4KbytesofFlashProgrammableandErasableRead

OnlyMemory(PEROM)and128bytesRAM.Thedeviceismanufacturedusing

Atm-el’shighdensitynonvolatilememorytechnologyandiscompatible

withtheindustrystandardMCS-51instructionsetandpinout.The

chipcombinesaversatile8-bitCPUwithFlashonamonolithicchip,

theAtm-elAT89C51isapowerfulmicrocomputerwhichprovidesahighly

flexibleandcosteffectivesolutiontomanyembeddedcontrol

applications.

Features:

CompatiblewithMCS-51Products

4KBytesofIn-SystemReprogrammableFlashMemory

Endurance:1,000Write/EraseCycles

FullyStaticOperation:0Hzto24MHz

Three-LevelProgramMemoryLock

128x8-BitInternalRAM

32ProgrammableI/OLines

Two16-BitTimer/Counters

SixInterruptSources

ProgrammableSerialChannel

LowPowerIdleandPowerDownModes

TheAT89C51providesthefollowingstandardfeatures:4Kbytesof

Flash,128bytesofRAM,32I/Olines,two16-bittimer/counters,a

fivevectortwo-levelinterruptarchitecture,afullduplexserialport,

on-chiposcillatorandclockcircuitry.Inaddition,theAT89C51is

designedwithstaticlogicforoperationdowntozerofrequencyand

supportstwosoftwareselectablepowersavingmodes.TheIdleMode

stopstheCPUwhileallowingtheRAM,timer/counters,serialportand

interruptsystemtocontinuefunctioning.ThePowerDownModesaves

theRAMcontentsbutfreezestheoscillatordisablingallotherchip

functionsuntilthenexthardwarereset.

BlockDiagram

PinDescription:

VCCSupplyvoltage.

GNDGround.

Port0

Port0isan8-bitopendrainbidirectionalI/Oport.Asanoutput

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