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:
Nov. 07, 2006
Filed:
Jul. 09, 2004
Yoji Serizawa, Shizuoka, JP;
Yoji Serizawa, Shizuoka, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A control program is previously stored in a flash ROM, and when update of the control program stored in the flash ROM is requested, control is changed to that based on a program stored in a mask ROM, and a control program as the subject of update is received and written into the flash ROM under the control of the program stored in the mask ROM. When writing of the new control program into the flash ROM has ended and the update of the control program in the flash ROM has been completed, the control is changed to that based on the updated control program. Further, information indicating whether or not the update of the control program has been normally completed is stored in an EEPROM, and control processing is performed based on the control program stored in the flash ROM or the control program stored in the mask ROM in accordance with the information.