NONCONTACT TRANSMISSION DEVICE
PROBLEM TO BE SOLVED: To provide a noncontact transmission device stably operable even if disturbance such as an electromagnetic wave or surge enters. SOLUTION: The noncontact transmission device 100 includes a monitoring clock oscillator 112 for outputting a monitoring clock LF0 having a frequency...
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Zusammenfassung: | PROBLEM TO BE SOLVED: To provide a noncontact transmission device stably operable even if disturbance such as an electromagnetic wave or surge enters. SOLUTION: The noncontact transmission device 100 includes a monitoring clock oscillator 112 for outputting a monitoring clock LF0 having a frequency lower than that of a system clock CK0; a control circuit 108; a memory 114 having information D stored to be used by the control circuit 108; and a reset circuit 116. The control circuit 108 includes an internal storage circuit for storing the information D read out from the memory 114. The control circuit 108 reads out and updates the information D stored in the internal storage circuit from the memory 114 in an update cycle based on the monitoring clock LF0. Further, the control circuit 108 reads out the information D, which is reset in a reset cycle longer than the update cycle based on the monitoring clock LF0 and stored in the internal storage circuit every time the information is reset, from the memory 114 and updates the read information. COPYRIGHT: (C)2008,JPO&INPIT |
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