Methods and apparatus for storing data in a multi-level cell flash memory device with cross-page sectors, multi-page coding and per-page coding

摘要

Methods and apparatus are provided for storing data in a multi-level cell flash memory device with cross-page sectors, multi-page coding and per-page coding. A single sector can be stored across a plurality of pages in the flash memory device. Per-page control is provided of the number of sectors in each page, as well as the code and/or code rate used for encoding and decoding a given page, and the decoder or decoding algorithm used for decoding a given page. Multi-page and wordline level access schemes are also provided.

主权项

1. A method for storing data in a multi-level cell flash memory device having a plurality of cells, wherein each cell of said multi-level cell flash memory device is capable of storing a plurality of bits, wherein each of said plurality of bits is from a different page, said method comprising:
determining a page type of a current page to be written in said multi-level cell flash memory device; determining a number-of-sectors per page associated with said determined page type; accumulating said determined number-of-sectors; encoding said accumulated sectors; and storing said accumulated sectors in said multi-level cell flash memory device, wherein said number-of-sectors per page is a non-integer number and at least one sector spans a plurality of pages.