| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To remove users' unnatural operation feeling for a momentary stop of an electric source without a complex circuit composition and occurrence of a running out micro computer for the momentary stop of the electric source caused by a shock or vibration. <P>SOLUTION: A camera device provides a 1st voltage value detection means which guarantees that the micro computer operates at a 1st operation frequency, and a 2nd voltage value detection means which guarantees that the micro computer operates at a 2nd operation frequency higher than the 1st operation frequency. When an electric source voltage becomes less than the 2nd voltage value, operation frequency of the micro computer is switched to the 1st operation frequency from the 2nd operation frequency by interrupt processing (#002), and control operation possible at the 1st operation frequency is executed. If the processing operation impossible to continue at the 1st operation frequency when the operation frequency is switched to the 1st operation frequency, this operation processing is cancelled. <P>COPYRIGHT: (C)2003,JPO</p> |
