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:
Jan. 02, 2001
Filed:
Apr. 14, 1999
Ryoji Tanaka, Kariya, JP;
Hirokazu Komori, Okazaki, JP;
Denso Corporation, Kariya, JP;
Abstract
Flash ROMs store a control program for controlling an internal combustion engine and a boot program for rewriting the flash ROMs in respective storage areas. A user breakable object area is set appropriately to the flash ROMs by a user breakable function of a UBC which a microcomputer has in an ECU. Thus, even when a reading command or a writing command is issued to predetermined addresses in the user breakable object area of the flash ROMs, the processing jumps to a predetermined other address without changing the stored therein. Therefore, a request of writing to the boot program storage area of the flash ROMs, which arises from some abnormality, can be eliminated.