Minolta Camera Kabushiki Kaisha

Noguyuki Taniguchi

Hiroshi Ueda

Hiroshi Ootsuka

Shinji Tominaga

Kouji Yamamoto

An electronic appliance having a microcomputer, peripheral devices controlled by the microcomputer, a main battery acting as power source, and a backup battery for outputting signals indicating the presence and absence of the main battery. Checking is made of whether the main battery is loaded in the appliance or not and whether the output voltage of the main battery is above a predetermined voltage or not. When the main battery is not loaded or when its output voltage is below the predetermined voltage, the backup battery is made available for preserving information in the memory inside or outside the microcomputer in good order, with operations of the peripheral devices being restricted at such times. Further, the disclosed electronic appliance provides for limiting malfunctioning of the microcomputer and the peripheral devices when a new main battery has been loaded in the appliance as replacement for an exhausted main battery.

Growing community of inventors

Tondabayashi, Japan

Noguyuki Taniguchi