Semiconductor device for IC tag, IC tag and control method for IC tag for detecting and executing command from radio wave
First Claim
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1. A semiconductor device for an IC tag, comprising:
- a receive unit for demodulating receive data from a received RF signal; and
a signal processing unit for detecting a command comprising data signals from the receive data demodulated by the receive unit and executing processing based on the command, wherein the signal processing unit has a command acceptance mode and a command execution mode, the command execution mode for executing the command when the command has previously been detected from receive data in the command acceptance mode, and cancelling the command when the command is detected from the receive data in the command execution mode, wherein the signal processing unit generates an error signal when the command detected in the command execution mode is canceled.
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Abstract
A semiconductor device for an IC tag comprises a receive unit for demodulating receive data from a received RF signal and a signal processing unit for detecting a command comprising data signals from the receive data demodulated by the receive unit and executing processing based on the command, wherein the signal processing unit has a command acceptance mode for detecting the command from the receive data and a command execution mode for executing the command, and cancels the data signal when the data signal is detected from the receive data in the command execution mode.
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Citations
14 Claims
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1. A semiconductor device for an IC tag, comprising:
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a receive unit for demodulating receive data from a received RF signal; and a signal processing unit for detecting a command comprising data signals from the receive data demodulated by the receive unit and executing processing based on the command, wherein the signal processing unit has a command acceptance mode and a command execution mode, the command execution mode for executing the command when the command has previously been detected from receive data in the command acceptance mode, and cancelling the command when the command is detected from the receive data in the command execution mode, wherein the signal processing unit generates an error signal when the command detected in the command execution mode is canceled. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An IC tag, comprising:
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a semiconductor device comprising; a receive unit for demodulating receive data from a received RF signal; and a signal processing unit for detecting a command comprising data signals from the receive data demodulated by the receive unit and executing processing based on the command, wherein the signal processing unit has a command acceptance mode and a command execution mode, the command execution mode for executing the command when the command has previously been detected from receive data in the command acceptance mode, and cancelling the command when the command is detected from the receive data in the command execution mode; and an antenna for transmitting/receiving radio waves to/from a reader/writer, the semiconductor device being connected to the antenna, wherein the signal processing unit generates an error signal when the command detected in the command execution mode is canceled.
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10. A control method for an IC tag for receiving RF signals transmitted from a reader/writer and executing processing based on receive data acquired by demodulating the RF signals, the method comprising:
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detecting by the IC tag whether a command comprising data signals is included in the receive data, executing the detected command in a command execution mode when the command has previously been detected from receive data in a command acceptance mode, canceling the command when the command is detected from the receive data in the command execution mode, and generating an error signal when the command detected in the command execution mode is canceled. - View Dependent Claims (11, 12, 13, 14)
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Specification