US 7,093,766 B2 · IC card having memory contents transfer control unit and method of storing data in IC card

Abstract

For addressing a problem of a long connecting time of an IC card with an information processing apparatus and a long external power supply time due to storage of data in a non-volatile memory area even after the IC card has completed processing, the present invention provides techniques for notifying the information processing apparatus connected to the IC card of the completion of the processing at the time the IC card has completed the processing, stopping power externally supplied to the IC card, and switching to an internal power supply unit of the IC card. Subsequently, the internal power supply unit is used to transfer data, the contents of which must be ensured from a volatile memory to a non-volatile memory to thereby solve the problem mentioned above.

Claims8

Dependent claims

An IC card for connection with an information processing apparatus to perform an operation therewith, said IC card comprising:

a processing execution unit to execute processing based on a request from said information processing apparatus and to notify said information processing apparatus of completion of said processing when said operation is completed;
a volatile memory to temporarily store data for executing said processing in said processing execution unit;
a non-volatile memory to store data, said contents of which must be preserved;
and
a memory contents transfer control unit to transfer data, which must be preserved, from said volatile memory to said non-volatile memory during an inoperative state of said processing execution unit.

2 more elements

Dependencies are inferred from the claim text.

IC card having memory contents transfer control unit and method of storing data in IC card

Life of this patent

IC card having memory contents transfer control unit and method of storing data in IC card

Life of this patent

Abstract

Claims8