摘要:
A method of reading a nonvolatile memory device comprises measuring threshold voltage distributions of a plurality of memory cells, combining the measured threshold voltage distributions, and determining local minimum points in the combined threshold voltage distributions to determine read voltages for a predetermined group of memory cells.
摘要:
A distribution analyzing method for a nonvolatile memory device having memory cells exhibiting overlapping first and second threshold voltage distributions includes; detecting a degree of overlap between the first and second threshold voltage distributions by reading data stored in the memory cells and determining read index data from the read data, and estimating a distribution characteristic for at least one of the overlapping threshold voltage distributions using the read index data.
摘要:
Disclosed is a program method of a non-volatile memory device which comprises classifying plural memory cells into aggressor cells and victim cells based on program data to be written in the plural memory cells; and programming the aggressor cells by a program manner different from the victim cells.
摘要:
Disclosed is an access method of a non-volatile memory device which comprises detecting a threshold voltage variation of a first memory cell, the a threshold voltage variation of the first memory cell being capable of physically affecting a second memory cell; and assigning the second memory cell to a selected sub-distribution from among a plurality of sub-distributions according to a distance of the threshold voltage variation of the first memory cell, the plurality of sub-distributions corresponding to a target distribution of the second memory cell.
摘要:
Disclosed is a program method of a non-volatile memory device which comprises classifying plural memory cells into aggressor cells and victim cells based on program data to be written in the plural memory cells; and programming the aggressor cells by a program manner different from the victim cells.
摘要:
Disclosed is an access method of a non-volatile memory device which comprises detecting a threshold voltage variation of a first memory cell, the a threshold voltage variation of the first memory cell being capable of physically affecting a second memory cell; and assigning the second memory cell to a selected sub-distribution from among a plurality of sub-distributions according to a distance of the threshold voltage variation of the first memory cell, the plurality of sub-distributions corresponding to a target distribution of the second memory cell.
摘要:
Nonvolatile memory devices include support memory cell recovery during operations to erase blocks of nonvolatile (e.g., flash) memory cells. A nonvolatile memory system includes a flash memory device and a memory controller electrically coupled to the flash memory device. The memory controller is configured to control memory cell recovery operations within the flash memory device by issuing a first instruction(s) to the flash memory device that causes erased memory cells in the block of memory to become at least partially programmed memory cells and then issuing a second instruction(s) to the flash memory device that causes the at least partially programmed memory cells become fully erased.
摘要:
Nonvolatile memory devices include support memory cell recovery during operations to erase blocks of nonvolatile (e.g., flash) memory cells. A nonvolatile memory system includes a flash memory device and a memory controller electrically coupled to the flash memory device. The memory controller is configured to control memory cell recovery operations within the flash memory device by issuing a first instruction(s) to the flash memory device that causes erased memory cells in the block of memory to become at least partially programmed memory cells and then issuing a second instruction(s) to the flash memory device that causes the at least partially programmed memory cells become fully erased.
摘要:
Example embodiments relate to an apparatus which may determine a length of data to be stored in a memory cell, and may store the data in a memory based on the determined length. A memory data storage apparatus according to example embodiments may, include: a determination unit that may determine a number of bits of data and a number of bits of data detection information to be stored in a memory cell; a data receiving unit that may receive data corresponding to the determined number of bits; an error correction coding unit that may perform an error correction coding with respect to the received data and generate data detection information corresponding to the number of bits of the data detection information; and a data storage unit that may store the received data and generated data detection information in the memory cell.
摘要:
A memory device and a method of reading multi-bit data stored in a multi-bit cell array may be provided. The memory device may include a multi-bit cell array including a least one memory page with each memory page having a plurality of multi-bit cells, and a determination unit to divide the plurality of multi-bit cells into a first group and second group. The first group may include multi-bit cells with a threshold voltage higher than a reference voltage. The second group may include multi-bit cells with a threshold voltage lower than the reference voltage. The determination unit may sequentially update the first group and second group while changing the reference voltage.