University of Pittsburgh

Sangyeun Cho

Rami G Melhem

Systems and methods are disclosed that facilitate storage and retrieval of data to/from memory with permanent faults. Permanent 'stuck at' faults, associated with individual bits, interfere with Write operations. A memory bit with the SA-0 fault does not store the value '1' while a memory bit with the SA-1 fault does not store the value &#x201c;0&#x201d;. Hence, when later retrieved by a Read operation, stored data located on one or more bits having a permanent fault may be different from the data that was originally written. Techniques are disclosed that facilitate correct retrieval of data in the presence of &#x201c;stuck at&#x201d; faults by keeping track of the positions of the bits that are stuck at a value different from the ones that are written and then, at Read time, inverting the values read from those positions.

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Pittsburgh, PA, United States of America

Sangyeun Cho