Binning of blocks for dynamic linking

摘要

A multi-plane non-volatile memory die includes circuits that receive and apply different parameters to different planes while accessing planes in parallel so that different erase blocks are accessed using individualized parameters. Programming parameters, and read parameters can be modified on a block-by-block basis with modification based on the number of write-erase cycles or other factors.

主权项

1. A method of operating erase blocks of a memory array in parallel comprising:
maintaining individual write-erase cycle counts for erase blocks of a block-erasable flash memory array; categorizing the erase blocks into a plurality of categories according to their write-erase cycle counts, erase blocks in a category having write-erase cycle counts within a predetermined cycle court range that does not overlap a cycle count range of any other category of the plurality of categories; dynamically selecting individual erase blocks in different planes for parallel operation in metablocks such that each erase block in an individual metablock is selected from a common category such that each erase block in the individual metablock has a cycle count within a cycle count range associated with the common category that is distinct from other categories of the plurality of categories; and operating the individual metablock using a common set of parameters that is applied to all erase blocks of the metablock, the common set of parameters determined by the common category according to the associated cycle count range, with each category of the plurality of categories having a different set of parameters.