SYSTEMS FOR AND METHODS OF EXTENDING LIFETIME OF NON-VOLATILE MEMORY

摘要

Systems and Methods are provided for increasing the number of writes to a page of non-volatile memory before the page must be erased. According to an embodiment, instead of writing a dataword directly to memory, a codeword is written to the memory location. The codeword is selected to minimize overwrite (e.g., bit-flipping) and to maximize the spread of wear across memory cells. In accordance with various embodiments of the invention, coset coding is integrated with error correction encoding; and once the previous state of a page is determined, a coset representative is selected on the basis of maximizing the number of writes to the page before erasing.

主权项

1. A method of managing memory, the method comprising:
receiving a write address and write data to be written to a memory location corresponding to the write address; reading a current memory state of the memory location corresponding to the write address; and selecting a codeword for the write data to write to memory according to a metric minimizing overwrite to the memory location corresponding to the write address and maximizing spread of wear across memory cells of the memory location.