通信工程专业英语论文.pdf

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TheGeneralSituationofAT89C51

TheAT89C51isalow-power,high-performanceCMOS8-bit

microputerwith4KbytesofFlashProgrammableandErasableReadOnly

Memory(PEROM)and128bytesRAM.Thedeviceismanufacturedusing

Atmel’shighdensitynonvolatilememorytechnologyandispatiblewith

theindustrystandardMCS-51™instructionsetandpinout.Thechipbines

aversatile8-bitCPUwithFlashonamonolithicchip;theAtmelAT89C51

isapowerfulmicroputerwhichprovidesahighlyflexibleandcost

effectivesolutiontomanyembeddedcontrolapplications.

Features:

•patiblewithMCS-51™Products

•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,afive

vectortwo-levelinterruptarchitecture,afullduplexserialport,

on-chiposcillatorandclockcircuitry.Inaddition,theAT89C51isdesigned

withstaticlogicforoperationdowntozerofrequencyandsupportstwo

softwareselectablepowersavingmodes.TheIdleModestopstheCPU

whileallowingtheRAM,timer/counters,serialportandinterruptsystem

.v.

..

tocontinuefunctioning.ThePower

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