SHA Devices Used in Small Cash Systems
Abstract:ThispaperdescribessmallcashsystemsandtheuseofiButton®SHAdevices,specifically,theDS1963SandDS1961S,astheelectronicallyreadabletokensinwhichthecashisstored.Twoscenariosarepresented.InscenarioA,boththetokensandthecoprocessorareDS1963SiButtons.InscenarioB,theDS1963SfunctionsascoprocessorinasystemthatusestheDS1961Sastokensorcarriersofelectroniccash.WhitePaper1SHADevicesUsedinSmallCashSystemswww.maxim-ic.comINTRODUCTIONPayingforproductsinthestoreiseasyandconvenient,providedthatthestoreaccepts"plasticmoney"andtheconveniencefeedoesn'tcuttoodeeplyintotheprofitofthemerchant.Naturally,forsmallpurchasesplasticisnotaccepted,whichthrowsthecustomerbackintotheageofpapermoneyandcoins.Traditionalvendingmachinesoperateoncoinsonly.Aspricesforproductsandservicesincreasetheprobabilityofhavingtherightselectionofcoinsonhanddecreases.The
