Non-contact ic card

Abstract

A memory ( 1 ) in a non contact type IC card ( 100 ) includes a data protection region (B 2 ) storing data requiring security and an region (B 1 ) storing other data. A main control circuit ( 2 ) generates data to be stored and designates a location for data storage in the region (B 1 ) or the data protection region (B 2 ) according to a content of the data. An address non selecting circuit ( 4 ) selects whether the generated data is to be written into the location in the data protection region (B 2 ) designated by the main control circuit ( 2 ) according to a state of a state setting circuit ( 3 ).

1 . (Canceled)  
     
     
         2 . (Canceled)  
     
     
         3 . (Amended) A non contact type IC card performing a data communication based on an externally applied radio wave signal, comprising: 
 receiving means ( 20 ) receiving said radio wave signal;    a rectifying circuit ( 21 ) connected to said receiving means ( 20 );    first storing means (B 2 ) storing said data requiring security;    second storing means (B 1 ) storing data other than said data to be stored in said first storing means (B 2 );    control means ( 2 ) generating said data based on the radio wave signal received at said receiving means ( 20 ) and controlling for writing said data into a location in one of said first storing means (B 2 ) and said second storing means (B 1 ) according to a content of said generated data;    detection means ( 7 ) detecting a frequency of the radio wave signal received by said receiving means ( 20 ); and    selection means ( 8 ) selecting whether said data is to be written into said location in said first storing means (B 2 ) designated by said control means ( 2 ) based on a result of the detection by said detection means ( 7 );    wherein when said receiving means ( 20 ) receives said radio wave signal and the frequency of said radio wave signal is detected to be a first frequency by said detection means ( 7 ), said data is written into said location in said first storing means (B 2 ) designated by said control means ( 2 ), whereas when the frequency of said radio wave signal is detected to be a second frequency other than said first frequency by said detection means ( 7 ), said data is not written into said location in said first storing means (B 2 ) designated by said control means ( 2 ).    
     
     
         4 . (Canceled)  
     
     
         5 . (Amended) A non contact type IC card responsive to externally applied data for performing data communication, comprising: 
 first storing means (B 2 ) storing said data requiring security;    second storing means (B 1 ) storing data other than said data to be stored in said first storing means (B 2 );    control means ( 2 ) controlling for writing said data into a location in one of said first storing means (B 2 ) and said second storing means (B 1 ) according to a content of said data; and    data fixing means ( 9 ) receiving said data to be written into said location in said first storing means (B 2 ) designated by said control means ( 2 ) and supplying a particular data;    wherein only said particular data supplied from said data fixing means ( 9 ) is written into said location in said first storing means (B 2 ) designated by said control means ( 2 ), and    wherein a value of said particular data supplied from said data fixing means ( 9 ) is a value determined by an initial state of said first storing means (B 2 ).    
     
     
         6 . A non contact type IC card responsive to externally applied data for performing data communication, comprising: 
 first storing means (B 2 ) storing said data requiring security;    second storing means (B 1 ) storing data other than said data to be stored in said first storing means (B 2 );    control means ( 2 ) controlling for writing said data into a location in one of said first storing means (B 2 ) and said second storing means (B 1 ) according to a content of said data;    selection means ( 11 ) selecting whether said data is to be written into said location in said first storing means (B 2 ) designated by said control means ( 2 ); and    state setting means ( 10 ) controlling the selection by said selection means ( 4 ); wherein 
 said data is written into said location in said first storing means ( 32 ) designated by said control means ( 2 ) when said state setting means ( 10 ) is in a first state, whereas, said data is written into a location other than said location in said first storing means (B 2 ) designated by said control means ( 2 ) when said state setting means ( 10 ) is in a second state other than the first state.  
   
     
     
         7 . (Canceled)  
     
     
         8 . The non contact type IC card according to  claim 6 , wherein said state setting means ( 3 ,  10 ) includes a fuse, said fuse is in an electrically conductive state in said first state and said fuse is in an electrically non conductive state in said second state.  
     
     
         9 . (Canceled)  
     
     
         10 . (Canceled)  
     
     
         11 . (Amended) A non contact type IC card responsive to externally applied data for performing data communication, comprising: 
 first storing means ( 16 ) storing said data requiring security;    second storing means ( 15 ) storing data other than said data to be stored in said first storing means ( 16 );    control means ( 2 ) controlling for writing said data into a location in one of said first storing means ( 16 ) and said second storing means ( 15 ) according to a content of said data;    wherein said first storing means ( 16 ) includes an EPROM, and    wherein said second storing means ( 15 ) includes an EEPROM.    
     
     
         12 . (Amended) A non contact type IC card responsive to externally applied data for performing data communication, comprising: 
 first storing means ( 16 ) storing said data requiring security;    second storing means ( 15 ) storing data other than said data to be stored in said first storing means ( 16 );    control means ( 2 ) controlling for writing said data into a location in one of said first storing means ( 16 ) and said second storing means ( 15 ) according to a content of said data;    wherein said first storing means ( 16 ) includes an EPROM, and    wherein said second storing means ( 15 ) includes a flash memory.