Ic card and portable electronic device
AssigneesKabushiki Kaisha Toshiba, Toshiba Infrastructure Systems & Solutions Corporation
InventorAkinori SHIGA
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Abstract
According to one embodiment, an IC card includes an antenna, a first oscillator, and a first processor. The first oscillator is configured to output a first clock signal of a first frequency, and output a second clock signal of a second frequency that is higher than the first frequency as requested. The first processor is configured to operate based on the first clock signal when not during an execution period of first processing corresponding to a reception command received by the antenna, request the second clock signal for executing the first processing, and execute the first processing based on the second clock signal of the first oscillator that receives the request.
Claims9
A portable electronic device comprising:
- an antenna;
- a first oscillator configured to output a first clock signal of a first frequency, and output a second clock signal of a second frequency that is higher than the first frequency as requested;
- a first processor configured to operate by a current induced electromagnetically in the antenna, operate based on the first clock signal when not during an execution period of first processing corresponding to a reception command received by the antenna, request the second clock signal for executing the first processing, execute the first processing based on the second clock signal of the first oscillator that receives the request, and instruct to execute second processing corresponding to the reception command received by the antenna;
- a second oscillator configured to output a third clock signal of a third frequency, and output a fourth clock signal of a fourth frequency that is higher than the third frequency as requested;
- and
- a second processor configured to operate by a current induced electromagnetically in the antenna, operate based on the third clock signal when not during an execution period of the second processing, request the fourth clock signal for executing the second processing based on an instruction to execute the second processing from the first processor, and execute the second processing based on the fourth clock signal of the second oscillator that receives the request.
An IC card comprising:
- an antenna;
- a first oscillator configured to output a first clock signal of a first frequency, and output a second clock signal of a second frequency that is higher than the first frequency as requested;
- a first processor configured to operate by a current induced electromagnetically in the antenna, operate based on the first clock signal when not during an execution period of first processing corresponding to a reception command received by the antenna, request the second clock signal for executing the first processing, execute the first processing based on the second clock signal of the first oscillator that receives the request, and instruct to execute second processing corresponding to the reception command received by the antenna;
- a second oscillator configured to output a third clock signal of a third frequency, and output a fourth clock signal of a fourth frequency that is higher than the third frequency as requested;
- and
- a second processor configured to operate by a current induced electromagnetically in the antenna, operate based on the third clock signal when not during an execution period of the second processing, request the fourth clock signal for executing the second processing based on an instruction to execute the second processing from the first processor, and execute the second processing based on the fourth clock signal of the second oscillator that receives the request.
Dependencies are inferred from the claim text.