| 摘要 |
PURPOSE:To prevent a sequence program from being interrupted by the replacement of a battery by supplying power from an auxiliary power supply to a controller simultaneously with the opening of a battery cover to store data in a sequentially stored working sequence. CONSTITUTION:A camera driving program is stored in a ROM 18 of a controller 11 and data in respective mechanism parts to be processed by a subroutine are sequentially stored in a RAM 20. If the cover 3 is opened to replace the battery on the way, a switch 9 is turned on and the voltage of a main capacitor 24 is divided by resistors 28, 29 and dropped into voltage value proper to power supply to the RAM 20, so that the data in the RAM 20 are not erased. Since the capacitor 24 is driven as an auxiliary power supply immediately before opening the battery cover, the sequence program interrupted after the replacing the battery can be continuously restarted.
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