Abstract: An IC card of an embodiment performs contactless communication with an external device having a first battery and a first carrier wave output device to output carrier wave using electric power of the first battery. The IC card is provided with a second battery, a second carrier wave output device, a battery remaining capacity reading processor and a comparing processor. The second carrier wave output device outputs carrier wave using electric power of the second battery, to supply electric power to the external device. The battery remaining capacity reading processor acquires information indicating a remaining capacity of the first battery. The comparing processor compares the remaining capacity of the first battery with of a remaining capacity of the second battery.

Abstract: An IC card of an embodiment performs contactless communication with an external device having a first battery and a first carrier wave output device to output carrier wave using electric power of the first battery. The IC card is provided with a second battery, a second carrier wave output device, a battery remaining capacity reading processor and a comparing processor. The second carrier wave output device outputs carrier wave using electric power of the second battery, to supply electric power to the external device. The battery remaining capacity reading processor acquires information indicating a remaining capacity of the first battery. The comparing processor compares the remaining capacity of the first battery with of a remaining capacity of the second battery.

Abstract: A portable electronic apparatus has a first storage section configured to store information to be communicated to the processing apparatus and formats for a frame to be transmitted to the processing apparatus, in association with one another. The processing apparatus has a second storage section configured to store information communicated by the portable electronic apparatus and the format of the frame transmitted by the portable electronic apparatus, in association with each other. The portable electronic apparatus select one of the formats stored in the first storage section based on the data to be transmitted to the processing apparatus. The processing apparatus recognize information communicated by the portable electronic apparatus based on the format of the frame received from the portable electronic apparatus.

Abstract: An information storage medium according to one embodiment of the invention includes a card main body embedded with a module, in which the module includes a communication control unit for interpreting received data, and selectively executing normal processing for returning response data to a transmission source of the received data based on a determination result indicating that the received data is correct data complying with a predetermined communication protocol, and error processing for returning an error to the transmission source of the received data based on a determination result indicating that the received data is error data.

Abstract: A processing apparatus of portable electronic devices, a portable electronic device, and a processing system of portable electronic devices are provided, each of which can process data at high speed. The processing apparatus has a transmitting/receiving unit configured to transmit and receive data to and from the portable electronic device. In the processing, the transmitting/receiving unit generates a first command and adds a second command to the first command.

Abstract: A portable electronic apparatus has a first storage section configured to store information to be communicated to the processing apparatus and formats for a frame to be transmitted to the processing apparatus, in association with one another. The processing apparatus has a second storage section configured to store information communicated by the portable electronic apparatus and the format of the frame transmitted by the portable electronic apparatus, in association with each other. The portable electronic apparatus select one of the formats stored in the first storage section based on the data to be transmitted to the processing apparatus. The processing apparatus recognize information communicated by the portable electronic apparatus based on the format of the frame received from the portable electronic apparatus.

Abstract: A processing apparatus of portable electronic devices, a portable electronic device, and a processing system of portable electronic devices are provided, each of which can process data at high speed. The processing apparatus has a transmitting/receiving unit configured to transmit and receive data to and from the portable electronic device. In the processing, the transmitting/receiving unit generates a first command and adds a second command to the first command.

Abstract: An information storage medium according to one embodiment of the invention includes a card main body embedded with a module, in which the module includes a communication control unit for interpreting received data, and selectively executing normal processing for returning response data to a transmission source of the received data based on a determination result indicating that the received data is correct data complying with a predetermined communication protocol, and error processing for returning an error to the transmission source of the received data based on a determination result indicating that the received data is error data.

Abstract: A no-battery information storage medium has a radio communication function of receiving power while receiving an externally transmitted radio wave as modulated data, and transmitting data outside the medium. One transmission/reception antenna coil performs transmission/reception. A first full-wave rectifying circuit is constituted by four rectifying elements connected to each other by bridging connection and connected to the two terminals of the transmission/reception antenna coil. A second full-wave rectifying circuit is constituted by four rectifying elements, including two shared rectifying elements of the four rectifying elements constituting the first full-wave rectifying circuit, connected to each other by bridging connection and connected to the two terminals of the transmission/reception antenna coil. A power generating section is connected to the output of the first full-wave rectifying circuit to generate power to be used inside the information storage medium.

Abstract: A reader/writer transmits power and modulated data to a no-battery information storage medium having a communication function in a noncontact state, and receives modulated data from the no-battery information storage medium. The reader/writer has a driver, a loop antenna, and a current detection unit. The driver transmits the power and the modulated data. The loop antenna is connected to the output line of the driver. The current detection unit is arranged between the loop antenna and the output line of the driver. While the reader/writer supplies a transmission carrier current from the driver to the loop antenna, if it receives the modulated data from the no-battery information storage medium, it uses the current detection unit to extract, as a reception signal, a change in transmission carrier current of the loop antenna caused by the modulated data signal received by the loop antenna.