The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 05, 1998
Filed:
Mar. 04, 1997
Seiichi Yasukawa, Yotsukaido, JP;
Nikon Corporation, Tokyo, JP;
Abstract
An option setting device for use with a camera includes a power supply unit supplying power to the option setting device, a microcomputer controlling the operations of the camera. A RAM stores option settings set by the microcomputer, while a non-volatile memory unit also stores the option settings set by the microcomputer. A normal reset generation unit generates a normal reset signal to reset the microcomputer after the introduction of power by the power supply unit, and an emergency reset generation unit generates an emergency reset signal to reset the microcomputer after an interruption of power from the power supply unit. A reset type discrimination unit determines after a reset has occurred whether the reset was caused by the normal reset generation unit or by the emergency reset generation unit and in the case that the reset type discrimination unit determines that the reset was caused by normal reset generation unit the contents of the non-volatile memory unit are transmitted to the RAM, and in the case that the reset type discrimination unit determines that the reset was by the emergency reset generation unit the microcomputer preserves the contents of the RAM without transmitting the contents of the non-volatile memory unit to the RAM. A method of operating the option setting device is also described.