Systems and methods for refreshing non-volatile memory

摘要

The present invention is related to methods and systems for refreshing non-volatile memories. A rewrite operation is performed followed by a refresh operation. The refresh operation is performed within a fixed time beginning at the byte cells associated with the selected bit line and proceeding to sequentially refersh cells associated with other bit lines. Cell currents are measured, and if a cell current meets a first criteria, the corresponding cell is refreshed.