Non-contact ic card
OwnerJunichi Hikita, Yoshihiro Ikefuji +2inventors
InventorsJUNICHI HIKITA, YOSHIHIRO IKEFUJI, SHIGEMI CHIMURA, HARUO TAGUCHI
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Abstract
A memory (1) in a non contact type IC card (100) includes a data protection region (B2) storing data requiring security and an region (B1) storing other data. A main control circuit (2) generates data to be stored and designates a location for data storage in the region (B1) or the data protection region (B2) 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 (B2) designated by the main control circuit (2) according to a state of a state setting circuit (3).
Claims12
(Canceled)
(Canceled)
(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 (B2) storing said data requiring security;
- second storing means (B1) storing data other than said data to be stored in said first storing means (B2);
- 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 (B2) and said second storing means (B1) 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 (B2) 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 (B2) 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 (B2) designated by said control means (2).
(Canceled)
(Amended) A non contact type IC card responsive to externally applied data for performing data communication, comprising:
- first storing means (B2) storing said data requiring security;
- second storing means (B1) storing data other than said data to be stored in said first storing means (B2);
- control means (2) controlling for writing said data into a location in one of said first storing means (B2) and said second storing means (B1) 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 (B2) 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 (B2) 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 (B2).
A non contact type IC card responsive to externally applied data for performing data communication, comprising:
- first storing means (B2) storing said data requiring security;
- second storing means (B1) storing data other than said data to be stored in said first storing means (B2);
- control means (2) controlling for writing said data into a location in one of said first storing means (B2) and said second storing means (B1) 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 (B2) 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 (B2) designated by said control means (2) when said state setting means (10) is in a second state other than the first state.
(Canceled)
(Canceled)
(Canceled)
(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.
(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.
Dependencies are inferred from the claim text.