Electronic apparatus having backup power source

Details Electronic apparatus having backup power source Electronic apparatus having backup power source

1991-03-04

1994-08-30

Mullins, James B.

Static information storage and retrieval

Powering

Data preservation

365229, G11C 1400

Patent

active

053434366

ABSTRACT:
An electronic apparatus of the invention uses memory information in each of the first memory area to store the end time of the power supply which was executed from the apparatus main body side to a memory card and the second memory area to store information regarding a residue time of a backup power supply element in the memory card which are provided in a memory element in the memory card and the present time information, thereby actually updating the residue information of the backup power supply element in the memory card. The residue information of the backup power supply element every memory card can be individually accurately managed.

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