Systems and Methods for Scheduling Post-Write Read in Nonvolatile Memory

摘要

Post-write reading of data stored in a memory is performed only after a threshold amount of time has elapsed from the time the data was programmed. The threshold amount of time is at least the relaxation time of the memory cells, so that memory cells have reached stable states when post-write reading is performed.

主权项

1. A method of operating a memory array comprising:
performing a write operation that writes data to a destination block; subsequently maintaining a time tag that indicates a time equal to or later than a time of completion of the write operation; comparing elapsed time from the time tag with a predetermined minimum elapsed time; and performing a post-write read operation to verify that data in the destination block is acceptable only after the elapsed time meets or exceeds the predetermined minimum elapsed time.