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:
Jun. 04, 2002
Filed:
Nov. 16, 2001
Kiyoshi Matsubara, Higashimurayama, JP;
Naoki Yashiki, Kodaira, JP;
Shiro Baba, Kokubunji, JP;
Takashi Ito, Kokubunji, JP;
Hirofumi Mukai, Musashino, JP;
Masanao Sato, Tokyo, JP;
Masaaki Terasawa, Akishima, JP;
Kenichi Kuroda, Tachikawa, JP;
Kazuyoshi Shiba, Kodaira, JP;
Other;
Abstract
A semiconductor device having and electrically erasable and programmable nonvolatile memory, for example, a rewritable nonvolatile memory including memory cells arranged in rows and columns and disposed to facilitate both flash erasure as well as selective erasure of individual units of plural memory cells. The semiconductor device which functions as a microcomputer chip also has a processing unit and includes an input terminal for receiving an operation mode signal for switching the microcomputer between a first operation mode in which the flash memory is rewritten under control of a processing unit and a second operation mode in which the flash memory is rewritten under control of separate writing circuit externally connectable to the microcomputer.