NONVOLATILE MEMORY SYSTEM AND RELATED METHOD OF PERFORMING ERASE REFRESH OPERATION

摘要

A memory system comprises a flash memory and a memory controller. The flash memory comprises a plurality of memory blocks. The memory controller performs a read retry operation on a memory block containing an uncorrectable read error until an accurate data value is read from the memory block. The memory controller then controls the flash memory to perform an erase refresh operation on the memory block.