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:
Feb. 21, 2006
Filed:
Jun. 12, 2002
Hirofumi Shinohara, Tokyo, JP;
Yoshiki Tsujihashi, Tokyo, JP;
Takeshi Hashizume, Tokyo, JP;
Renesas Technology Corp., Tokyo, JP;
Abstract
A semiconductor memory includes a redundant RAM disposed independently of at least one regular RAM, the redundant RAM having redundant memory elements by which defective memory elements of the regular RAM can be replaced, and a control block for selecting either at least the regular RAM or the redundant RAM according to an address applied thereto, and for reading data from a memory cell of the selected RAM specified by the address. A plurality of regular RAMs can be disposed and the redundant RAM includes redundant memory elements by which defective memory elements of an arbitrary one of the plurality of regular RAMs can be replaced. The control block selects either one of the plurality of regular RAMs or the redundant RAM according to an address applied thereto, and reads data from a memory cell of the selected RAM specified by the address.