Dual mapping between program states and data patterns

摘要

The present disclosure includes methods and apparatuses for dual mapping between program states and data patterns. One apparatus includes a memory and a controller configured to control a dual mapping method comprising: performing a base conversion on a received data pattern and mapping a resulting base converted data pattern to one of a first number of program state combinations corresponding to a first group of memory cells; and determining a number of error data units corresponding to the base converted data pattern and mapping the number of error data units to one of a number of second program state combinations corresponding to a second group of memory cells. The number of error data units are mapped to the one of the second number of program state combinations corresponding to the second group of memory cells without being base converted.

主权项

1. An apparatus, comprising:
a first mapping component configured to:
perform a base conversion process on a data pattern received thereby; andmap the base converted data pattern to one of a first number of program state combinations corresponding to a first group of memory cells to which the base converted data pattern is to be stored; an error code component configured to generate error data based on the base converted data pattern; and a second mapping component configured to map the error data generated by the error code component to one of a second number of program state combinations corresponding to a second group of memory cells to which the error data is to be stored; wherein the first group of memory cells is configured to store a first number of data units per cell and the second group of memory cells is configured to store a second number of data units per cell, the first number of data units per cell being different than the second number of data units per cell.