c单片机论文英文文献翻译.pdf
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