Abstract: A semiconductor device transmits a wireless signal to a power reception device that charges a battery, transmits a charge completion signal when the battery charge is completed, and transmits a response signal in reply to a query signal in the wireless signal. The semiconductor device includes a drive control circuit, a reception circuit, and a controller. The controller can control, when the reception circuit does not receive the response signal or receives the charge completion signal, the drive control circuit to transmit communication capable power that makes it possible to communicate with the power reception device and control, when the reception circuit receives the response signal and does not receive the charge completion signal, the drive control circuit to transmit charging power capable of charging the battery of the power reception device by the wireless signal, the charging power being higher than the communication capable power.

Abstract: A semiconductor device transmits a wireless signal to a power reception device that charges a battery, transmits a charge completion signal when the battery charge is completed, and transmits a response signal in reply to a query signal in the wireless signal. The semiconductor device includes a drive control circuit, a reception circuit, and a controller. The controller can control, when the reception circuit does not receive the response signal or receives the charge completion signal, the drive control circuit to transmit communication capable power that makes it possible to communicate with the power reception device and control, when the reception circuit receives the response signal and does not receive the charge completion signal, the drive control circuit to transmit charging power capable of charging the battery of the power reception device by the wireless signal, the charging power being higher than the communication capable power.

Abstract: An RFID communication system includes a communication parameter setting section configured to modifiably set communication parameters in performing wireless communication; a receiving state determining section configured to, in the case where a signal for causing an RFID provided with a wireless communication function to wirelessly reply has been wirelessly transmitted with respect to the above described RFID by using the previously set communication parameters, determine a state of receiving a reply signal wirelessly replied from the above described RFID; and a control section configured to, if a determination result by the above described receiving state determining section does not satisfy a predetermined condition, control to modify the communication parameters modifiable by the above described communication parameter setting section.

Abstract: A wireless information processing system has a wireless information processing apparatus and a wireless information recording medium. The apparatus has a first signal generator generating a first signal requesting the recording medium to set a command slot, a second signal generator generating a second signal requesting the recording medium to transmit a identification information, a third signal generator generating a third signal requesting the recording medium to set a time slot, and a receiver receiving a response signal from the recording medium. The recording medium has a receiver receiving the first to third signals, a command slot setup unit setting the command slot, an accumulation unit accumulating a number of receiving times of the second signal, a transmitter transmitting the response signal at a response time interval defined by the time slot, and a time slot setup unit setting the time slot.

Abstract: A wireless information processing system has a wireless information processing apparatus and a wireless information recording medium. The apparatus has a first signal generator generating a first signal requesting the recording medium to set a command slot, a second signal generator generating a second signal requesting the recording medium to transmit a identification information, a third signal generator generating a third signal requesting the recording medium to set a time slot, and a receiver receiving a response signal from the recording medium. The recording medium has a receiver receiving the first to third signals, a command slot setup unit setting the command slot, an accumulation unit accumulating a number of receiving times of the second signal, a transmitter transmitting the response signal at a response time interval defined by the time slot, and a time slot setup unit setting the time slot.