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US 2006/0138653 A1Published application
RFIC chip, and position recognition system and security system using the same
AssigneeInternational Business Machines Corporation
InventorsYohichi Miwa, Aya Minami
Life of this patent
Estimating the term…
Abstract
Included are: a circuit unit having a non-volatile memory; a circuit unit having a volatile memory; a read-write circuit for reading data from, writing data into, the non-volatile memory, and for reading data from, writing data into, the volatile memory; an antenna and an RF amplifier which are first power supply means for receiving a first radio wave, and for supplying power to the circuit unit; and an antenna and an RF amplifier which are second power supply means for receiving a second radio wave whose frequency is different from that of the first radio wave, and for supplying power to the circuit unit.
Claims14
An RFIC chip comprising:
- a first circuit unit including a non-volatile memory;
- a second circuit unit including a volatile memory;
- read-write means for reading data from, and writing data into, the non-volatile memory, and for reading data from, and writing data into, the volatile memory;
- first power supply means for receiving a first radio wave, and for supplying power to the first circuit unit;
- and
- second power supply means for receiving a second radio wave whose frequency is different from that of the first radio wave, and for supplying power to the second circuit unit.
3 more elements
An RFIC chip comprising:
- power supply means for receiving a radio wave and supplying power to circuits in the chip;
- a first circuit unit operating by receiving power supplied from the power supply means when the power supply means receives a first radio wave;
- and
- a second circuit unit operating by receiving power supplied from the power supply means when the power supply means receives a second radio wave whose frequency is different from that of the first radio wave, the second circuit unit holding predetermined data in a memory while the power supply means is receiving the second radio wave.
1 more element
A position recognition system comprising:
- an RFIC chip;
- a reader for making communications with the RFIC chip by use of a first radio wave which enables the communications with the RFIC chip in an entire first area;
- and
- a writer for making communications with the RFIC chip by use of a second radio wave which enables the communications with the RFIC chip only in a second area set within the first area,
- wherein the RFIC chip comprises:
- power supply means for receiving any one of the first and the second radio waves, and for supplying power to a circuit in the chip;
- a first circuit unit operating by receiving power supplied from the power supply means when the power supply means receives the first radio wave;
- and
- a second circuit unit operating by receiving power supplied from the power supply means when the power supply means receives the second radio wave, the second circuit unit holding data in a memory while power supply means is receiving the second radio wave,
- wherein when the RFIC chip is located in the first area, the reader makes communications with the RFIC chip, causes the first circuit unit to operate, and reads out data stored in the memory, and
- wherein when the RFIC chip is located in the second area, the writer makes communications with the RFIC chip, causes the second circuit unit to operate, and writes predetermined data into the memory.
8 more elements
A security system comprising:
- an RFIC chip;
- a reader for making communications with the RFIC chip by use of a first radio wave which enables the communications with the RFIC chip in an entire first area;
- and
- a writer for making communications with the RFIC chip by use of a second radio wave which enables the communications with the RFIC chip only in a second area set within the first area,
- wherein the RFIC chip comprises:
- power supply means for receiving any one of the first and the second radio waves, and for supplying power to a circuit in the chip;
- a first circuit unit operating by receiving power supplied from the power supply means when the power supply means receives the first radio wave;
- and
- a second circuit unit operating by receiving power supplied from the power supply means when the power supply means receives the second radio wave,
- wherein any one of the first and the second circuit units comprises:
- a volatile memory;
- and
- write means for writing data into the volatile memory,
- herein the other one of the first and the second circuit units comprises:
- a non-volatile memory;
- and
- read means for reading out data stored in the non-volatile memory on condition that particular data be held in the volatile memory,
- wherein the reader makes communications with the RFIC chip, causes any one of the second circuit unit and the first circuit unit to operate, and reads out data stored in the non-volatile memory, when the RFIC chip is located in the first area, and
- wherein the writer makes communications with the RFIC chip, causes any one of the first circuit unit and the second circuit unit to operate, and writes the particular data into the volatile memory, when the RFIC chip is located in the second area.
16 more elements
A security system comprising:
- an RFIC chip;
- a reader for making communications with the radio frequency IC chip by use of a first radio wave which enables the communications with the radio frequency IC chip in an entire first area;
- and
- a writer for making communications with the RFIC chip by use of a second radio wave which enables the communications with the RFIC chip only in a second area set within the first area,
- wherein the RFIC chip comprises:
- power supply means for receiving any one of the first and the second radio waves, and for supplying power to circuits in the chip;
- a first circuit unit operating by receiving power supplied from the power supply means when the power supply means receives the first radio wave;
- and
- a second circuit unit operating by receiving power supplied from the power supply means when the power supply means receives the second radio wave,
- wherein any one of the first and the second circuit units comprises:
- a volatile memory;
- and
- write means for writing data into the volatile memory,
- wherein the other one of the first and second circuit units comprises:
- a non-volatile memory;
- read-write means for reading data from, and writing data into, the non-volatile memory;
- and
- a cryptographic circuit executing cryptographic processing of data read from or to be written into the non-volatile memory using data held in the volatile memory as a cryptographic key,
- wherein when the RFIC chip is located in the first area, the reader makes communications with the radio frequency IC chip, and causes any one of the first and the second circuit units to operate, read data from, or write data into, the non-volatile memory, and execute cryptographic processing of the data using the cryptographic key, and
- wherein when the RFIC chip is located in the second area, the writer makes communications with the RF IC chip, causes any one of the first and the second circuit units to operate, and writes the data serving as the cryptographic key into the volatile memory.
17 more elements
Dependencies are inferred from the claim text.