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:
Jul. 01, 2008
Filed:
Dec. 27, 2006
Chi-sung OH, Gyeonggi-do, KR;
Ho-cheol Lee, Gyeonggi-do, KR;
Nam-jong Kim, Gyeonggi-do, KR;
Samsung Electronics Co., Ltd., Suwon-si, Gyeonggi-do, KR;
Abstract
A semiconductor memory device and a method therefor for changing an access right to access a shared memory area according to an external command and a refresh mode is provided. In one embodiment, the semiconductor memory device includes a plurality of input/output ports for inputting command signals for first or second mode refresh operation, a memory array divided into a plurality of different memory areas including a shared memory area that is accessible via at least two of the plurality of input/output ports, and a grant control block for assigning an access right to access the shared memory area in response to an external command signal. The grant control block may also generate grant control signals for preferentially assigning the access right to access the shared memory area to the input/output port for inputting the command signals for the first mode refresh operation.