Patent ID: 6234902
Filing Date: 2001-05-22
Classification: A63F

Abstract:
A data carrier comprising:an antenna for receiving a radio wave;an information communicating means for receiving radio wave information from the outside through said antenna and transmitting information through electromagnetic induction;a generating means for generating operational electric power by electro-magnetic induction using the radio wave transmitted from an outside reading machine and received through a coil;a notifying means for notifying said reading machine of detecting that said generating means generates a predetermined quantity of electric power;a judging means for making, when a transmission of the radio wave from the reading machine is interrupted and thereafter resumes after said notifying means has given a notification, a judgment about a top surface and an underside of a card body on the basis of a direction of an electric current induced in said coil;a first function means operating when said judging means judges that the top surface of the card body is set in at appropriate direction;a second function means operating when said judging means judges that the underside of the card body is set in the appropriate direction;a multi-value memory having a multi-value memory cell which has a control gate and a charge storage layer for taking at least three storage statuses and which stores one of the at least three storage statuses; anda control unit for executing a process with respect to the outside on the basis of the information received by said information communicating means and a storage content of said multi-value memory, wherein the transmitting unit transmits a result of the process.