Using a PC with a DS3900 to Communicate with DS1267s, DS1867s, and DS1868s

Abstract:ThisapplicationnotedescribeshowtousetheDS3900PCserialportto3-wireinterfacetocommunicatewiththethreedigitalpots,theDS1267,DS1867,andDS1868,whichusethisshiftregisterinterfaceforprogramming.TheDS3900isamodulethathasaMAX3223RS-232transceiverandamicroprocessorwhichactsasaninterfacebetweenthePC'sserialportthe3-wiredevicebeingcontrolled.Thetransceiverallowsthemodule’smicroprocessortocommunicatewithaPCandthemicroprocessorimplementsacommandstructure,viaitsparallelport,toallowaPCtoreadorwritethethreedigitalpotentiometers.TheapplicationnotedescribestheDS3900andhowtointerfaceittothedevicesundertest.ThesourcecodedescribedinthearticleisavailableonDallasSemiconductor’sFTPsite.Maxim>AppNotes>A/DandD/ACONVERSION/SAMPLINGCIRCUITSDIGITALPOTENTIOMETERSGENERALENGINEERINGTOPICSKeywords:DS1267,DS1867,DS1868,DS3900,3-wire,digitalpots,3wire,digitalpotentiometersAug27,2002APPLICATIONNOTE213UsingaPCwithaDS3900toCommunicatewithDS1267s,DS1867s,andDS1868sAbstract:ThisapplicationnotedescribeshowtousetheDS3900PCserialportto3-wireinterfacetocommunicatewiththethreedigitalpots,theDS1267,DS1867,andDS1868,whichusethisshiftregisterinterfaceforprogramming.TheDS3900isamodulethathasaMAX3223RS-232transceiverandamicroprocessorwhichactsasaninterfacebetweenthePC'sserialportthe3-wiredevicebeingcontrolled.Thetransceiverallowsthemodule’smicroproces