| 摘要 |
PROBLEM TO BE SOLVED: To reduce the amount of operation required for time setting through such control as a time data is read out from a memory means when power supply is resumed and a time is set again. SOLUTION: When a user set 13 a time, a system control section 12 stores a set time data in a memory section 14 and counts the time from the set time data. When a battery is removed to interrupt power supply from a main power supply 15 to each part,, the control section 12 sustains the backup and count operation of time data through a backup power supply section 16. When a lithium battery or the like is removed to interrupt power supply from the power supply 16, the control section 12 stops the count operation of time data. When power is fed again to the control section 12 from the power supplies 15, 16, the control section 12 reads cuts a time data being set previously from the memory section 14 and brings about a time set mode using that data. Consequently, the amount of operation required for a user to set a time can be reduced. |
