| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a data holding device capable of properly protecting data in memory for an intermittent power outage. <P>SOLUTION: The data holding device having a RAM 25 for holding predetermined data detects the source voltage of the power source 30 of the RAM 25 and detects the fluctuation rate of the source voltage; if the fluctuation rate of the source voltage of the power source 30 equal to or greater than a predetermined rate is detected and if the source voltage of the power source 30 is not higher than a predetermined voltage, a power supply path between the power source 30 and a predetermined electric load 70 supplied with power from the power source 30 is shut off by a transistor Tr2. <P>COPYRIGHT: (C)2008,JPO&INPIT |
