| 摘要 |
<p>Provided is a non-contact communication device which can perform non-contact communication even when the control means cannot be operated because of a drop in the battery voltage or a reset, wherein the device has a memory element (15) which stores the resonance frequency adjusting data and the communication condition data, and a setting register (2) which can temporarily hold the resonance frequency adjusting data and the communication condition data. A CPU (17) downloads the resonance frequency adjusting data and the communication condition data from the memory element (15) to the setting register (2) before a reset by the CPU reset signal. When the CPU (17) is reset by the CPU reset signal, the resonance frequency adjusting data downloaded to the setting register (2) are used to adjust the resonance frequency of the 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.</p> |
