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NON-CONTACT COMMUNICATION DEVICE

  • US 20110205133A1
  • Filed: 06/23/2009
  • Published: 08/25/2011
  • Est. Priority Date: 10/17/2008
  • Status: Abandoned Application
First Claim
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1. A non-contact communication device which is driven by a battery and conducts non-contact communication by adjusting a resonance frequency of an antenna circuit using data for resonance frequency adjustment, the non-contact communication device comprising:

  • a memory section that stores the data for resonance frequency adjustment;

    a control section that is reset by a first reset signal issued at the time when a voltage of the battery falls below a first threshold value;

    a register section that temporarily holds data and is reset by a second reset signal issued at the time when the voltage of the battery falls below a second threshold value lower than the first threshold value; and

    the antenna circuit whose resonance frequency is adjusted by the data temporarily held in the register section,wherein the control section downloads the data for resonance frequency adjustment from the memory section to the register section as the data before the control section is reset by the first reset signal, and the resonance frequency of the antenna circuit is adjusted using the data for resonance frequency adjustment previously downloaded to the register section in a state that the control section is reset by the first reset signal.

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