原文Title:AT89S52MCUAPPLICATIONSFunctionCharacteristicDescriptionTheAT89S52isalow-power,high-performanceCMOS8-bitmicrocontrollerwith8Kbytesofin-’shigh-patiblewiththeindus-try--chipFlashallowstheprogrammemorytobereprogrammedin-systemorbyaconventionalnonvolatilememorypro--bitCPUwithin-hip,theAtmelAT89S52isapowerfulmicrocontrollerwhichprovidesahighly-flexibleandcost-:8KbytesofFlash,256bytesofRAM,32I/Olines,Watchdogtimer,twodatapointers,three16-bittimer/counters,asix-vectortwo-levelinterruptarchitecture,afullduplexserialport,on-chiposcillator,,,timer/counters,serialport,-downmodesavestheRAMcon-tentsbutfreezestheoscillator,-bitcounterandtheWatchdogTimerReset(WDTRST),ausermustwrite01EHand0E1Hi
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