| 摘要 |
A problem of the invention is to provide a non-contact communication device capable of conducting non-contact communication even when a control section cannot be operated a drop in a battery voltage or a reset. A memory element (15) for storing resonance frequency adjustment data and communication condition data, and a setting register (2) capable of temporarily holding the resonance frequency adjustment data and the communication condition data from the memory element (15) to the setting register (2) before a reset by a CPU (17). When the CPU (17) is reset by a CPU reset signal, the resonance frequency adjusting data downloaded to the setting register (2) are used to adjust the resonance frequency of an antenna circuit. Thus, non-contact communication can be performed even when the CPU cannot operate because of a drop in the battery voltage or a reset.
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