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:
Aug. 27, 2013
Filed:
Dec. 22, 2010
Zheng Chen, Upper Macungie, PA (US);
Rohith Sood, Portland, OR (US);
Loren Mclaury, Hillsboro, OR (US);
Zheng Chen, Upper Macungie, PA (US);
Rohith Sood, Portland, OR (US);
Loren McLaury, Hillsboro, OR (US);
Lattice Semiconductor Corporation, Hillsboro, OR (US);
Abstract
A programmable logic device (PLD) is provided that includes: a configuration memory including a plurality of memory cells arranged according to rows and columns, wherein a subset of the rows are RAM rows, and wherein a subset of the columns in each RAM row are RAM columns and at least one column in each RAM row is a flag bit column, the memory cells corresponding to the flag bit column and RAM rows operable to store flag bit signals; a soft error detection (SED) circuit operable to read the configuration memory to derive a checksum; a logic circuit to determine if a RAM row is being read by the SED circuit that includes an asserted flag bit; and a blocking circuit that provides a known logical value to the SED circuit responsive to the logic circuit to block readback of the memory cells corresponding to the RAM rows and RAM columns.