patiblewithMCS-51Products?8KBytesofIn-SystemProgrammable(ISP)FlashMemory–Endurance:10,000Write/EraseCycles??FullyStaticOperation:0Hzto33MHz?Three-levelProgramMemoryLock?256x8-bitInternalRAM?32ProgrammableI/OLines?Three16-bitTimer/Counters?EightInterruptSources?FullDuplexUARTSerialChannel?Low-powerIdleandPower-downModes?InterruptRecoveryfromPower-downMode?WatchdogTimer?DualDataPointer?Power-offFlag?FastProgrammingTime?FlexibleISPProgramming(ByteandPageMode)?Green(Pb/Halide-free)-power,high-performanceCMOS8-bitmicrocontrollerwith8Kbytesofin-’shigh-patiblewiththeindus-try--chipFlashallowstheprogrammemorytobereprogrammedin-systemorbyaconventionalnonvolatilememorypro--bitCPUwithin-hip,theAtmelAT89S52isapowerfulmicrocontrollerwhichprovidesahighly-flexibleandcost-:8KbytesofFlash,256bytesof2RAM,32I/Olines,Watchdogtimer,twodatapointers,three16-bittimer/counters,asix-vectortwo-levelinterruptarchitecture,afullduplexserialport,on-chiposcillator,,,timer/counters,serialport,-downmodesavestheRAMcon-tentsbutfreezestheoscillator,.:::Port0isan8-bitopendrainbidirectionalI/,,thepinscanbeusedashigh--orderaddress/,P0hasinternalpull-
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