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. 23, 2004
Filed:
Jan. 17, 2003
Junya Kawamata, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A nonvolatile memory circuit, comprises: memory regions, which contain N (N is a plurality) of the sectors, N not being an exponentiated number of two and the sectors having the same capacity; a sector selection circuit for decoding a sector address and selecting the sector which corresponds to the sector address; and a memory control circuit which, in response to an erase command, executes an erase operation to the selected sector and, upon verifying that the erasure is complete, sequentially changes said sector address to select the next sector. When a sector that does not exist in the memory regions is selected, said memory control circuit selects the next sector without performing an erase operation to the nonexistent sector.