摘要 |
<p>PROBLEM TO BE SOLVED: To prevent the disappearance of important data stored in a volatile memory by effectively using less storage capacity for backup. SOLUTION: In this portable information equipment in which the content of RAM 3 is kept with power supplied from a battery, conditions for backing up information stored in RAM 3 in a flash memory 4 (the presence or absence of the execution of backup at the time of consuming the battery and the designation of information being a backup object) are set and information stored in RAM 3 is backed up in the flash memory 4 in accordance with the conditions for executing backup when a power monitoring part 13 detects that the condition becomes a prescribed one or when the execution of backup is instructed at arbitrary timing.</p> |