PIC单片机的KEELOQ XTEA应答接收系统

Anumberofremoteaccessapplicationsrelyonthe

userverifyingiftheaccesspoint(gate,door,vehicle,

etc.)hasbeenproperlyclosedoropened.This

applicationnotedescribesasystembywhichthe

accesspoint(receiver)respondsbacktotheremote

transmitterwithastatusmessage.AN1323PICMCUKEELOQ/XTEAReceiverSystemwithAcknowledgeAuthor:CristianTomaTRANSMITTERLEARNINGMicrochipTechnologyInc.Thereceiverwillrespondonlytoknowntransmitters.Thismeansthat,beforeatransmittercanbeusedwithareceiver,itmustbelearned.Bylearning,wedefineINTRODUCTIONtheprocessbywhichthereceivergathersandstoresinformationaboutatrans