CPC G11C 16/349 (2013.01) [G11C 16/12 (2013.01); G11C 2211/5641 (2013.01)] | 19 Claims |
1. A method, comprising:
tracking single level cell (SLC) mode cycles and extra level cell (XLC) mode cycles of mixed mode blocks of memory cells; and
determining a mixed mode cycle count according to a relationship
wherein “S” is a determined quantity of SLC mode cycles, “X” is a determined quantity of XLC mode cycles, and “WR” is a wear ratio of SLC operation wear to XLC operation wear by:
adjusting a counter by a first amount for each SLC mode cycle to maintain a count of physical cycles to the mixed mode blocks in SLC mode; and
adjusting the counter by a second amount for each XLC mode cycle to maintain a count of physical cycles to the mixed mode blocks in XLC mode.
|