METHOD, ELECTRONIC DEVICE AND CONTROLLER FOR RECOVERING ARRAY OF MEMORY CELLS

摘要

A method, an electronic device and a controller for recovering an array of memory cells are provided. The method comprises the following steps. Whether a recovery control signal is received or not is determined. A retention checking procedure is executed for identifying whether a threshold voltage distribution of at least one bit of the memory cells in high threshold state is shifted or not, if the recovery control signal is received. A retention writing procedure is executed on the memory cells, if the memory cells in high threshold state do not pass the retention checking procedure.

主权项

1. A method for recovering an array of memory cells, comprising:
determining whether a recovery control signal is received; executing a retention checking procedure for identifying whether a threshold voltage distribution of at least one bit of the memory cells in high threshold state is shifted or not, if the recovery control signal is received; and executing a retention writing procedure on the memory cells, if the memory cells in high threshold state do not pass the retention checking procedure.