AbstractSerial-EthernetConverterDesignandItsRelatedCommunicationPowerMonitoringSystemThistextdesignsaserial-Ethernetconverter,serial-EthernetconverteristheequipmentthatcanrealizeserialinterfacetoconnectwithRJ-45interfaceeachother.ThatiswhentheserialequipmentsendsdatatoEthernetfirstthroughlevelwhenafterconversionthenpressEthernettransferprotocol(TCP/IP)ofserialdataencapsulationmakeitbecomeEthernetframeformatpacket,thensendtoEthernet;Instead,willreceiveEthernetframeformatpacketparsedandpackaging,throughthelevelafterconvertingintoserialinterface,thuscompletingtheserialdataandEthernetframeformatdataconversion,furtherrealizedwillnothavenetworkinterfaceofcommunicationequipmentthroughthedeviceitselfofserialaccessEthernetfunction.Theconvertermainlyconsistsoffourmodules:levelconversionmodule,thecontrollermodule,networkinterfacemoduleandmemorymodule.SerialconversionmoduleismainlybytheDB9serialinterfaceandMAX232levelneedleoftransitionchip.OneforallkindsofelectricalequipmentDB9namelyintheextensiveuseofRS-232serialinterface,itiswholeconverterandserialequipmentofphysicalinterface.BecausedigitalcomponentslevelsinglechipforTTLlevelandserialinterfaceforRS-232standardlevels,inordertomakeequipmentandSCMcanbereliablybetweenonserialcommunication,designusingspecialchipMAX232forlevelconversion.ConverterusingAT89C52asmicrocontroller,inthenetworkinterfaceterminal,throughtothenetworkinterfacechipmicro-controllerisRTL8019AScontroltoachievedataframeformatconversion;BasedonRS-232end,useMAX232realizeTTLlevelconversion.Inconverterwork,butwillallsortsoftransmissionandconversionofdatastoredin62256,by93C46andlatches74HC573constitutememoryunitmodule.InsystemworkhavelargeamountofdatatoeachinterfacechipprocessorandRAM,useexternaltodealwiththepurposeofwhichistoimprovetheMCUdatatransmissionspeedandforcomplexTCP/IPIIIprotocolprocessingability.BecausethepacketmaximumEthernetcanreachmorethan1,500bytes,thoughtheAT89C52singleinteriorhas8KbytesofFlashmemory,buttheSCMorc