| 摘要 |
PROBLEM TO BE SOLVED: To guarantee data recording to a flash ROM inside a portable information processing system whose power source is a battery capable of suspension and resuming processings even when a battery voltage is lowered. SOLUTION: When it is detected that the voltage of the battery 4 is turned lower than a prescribed value by a battery voltage checking means 111, a data recording control part 11 sets the fact that data can not be recorded to the flash ROM 3 to a non-recording flag 14 for receiving the support of a backup battery 5 and tentatively records the data 2 in an operation area 15. The data recording control part 11 at the time of resumption is activated at the time of the resumption of the next time, checks the non-recording flag 14, and in the case that non-recorded data are present, checks whether or not the battery 4 is restored to a voltage state capable of writing the data in the flash ROM by the battery voltage checking means 121 and copies the data which could not be written in a previous time from the operation area to the flash ROM when the battery voltage is a normal value. |
