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. 15, 2011
Filed:
Nov. 03, 2009
Loren Mclaury, Hillsboro, OR (US);
David Lee Rutledge, Hillsboro, OR (US);
Loren McLaury, Hillsboro, OR (US);
David Lee Rutledge, Hillsboro, OR (US);
Lattice Semiconductor Corporation, Hillsboro, OR (US);
Abstract
In one embodiment, an integrated circuit includes a flash memory array with at least first and second subarrays, or sectors, of memory cells. The subarrays have a set of shared bitlines and separate sets of word lines. A bitline driver circuit is coupled to the set of shared bitlines, a first row driver circuit is coupled to the set of word lines of the first subarray, and a second row driver circuit is coupled to the set of word lines of the second subarray. The first and second row driver circuits are operable to enable the memory cells of the first subarray to be erased independently of the memory cells of the second subarray. The two row driver circuits are further operable to enable the memory cells of the second subarray to be erased independently of the memory cells of the first subarray.