| 摘要 |
<p>PURPOSE:To previously prevent the runaway of a system owing to the destruction of internal data by incorporating information showing the history of the voltage drop of a battery in a memory which is battery-backed up, and checking the hysteresis of the voltage drop in the battery at the time of starting. CONSTITUTION:A battery voltage drop history storage part 4 leaving the history of the voltage drop in the battery is provided in the memory 2. Namely, the voltage drop in the battery in any case can be recognized such as whether the voltage is previously dropped when main power source is used or whether the voltage of power source is dropped at the time of backing up the battery by reading information in the battery voltage drop history storage part 4 when the operation of an information processor starts in main power source. Thus, the runaway of the system owing to the destruction of internal data can previously be prevented.</p> |
