摘要:
A method of operating a memory controller in a memory system including a nonvolatile memory device includes; erasing memory cells of a target memory block of the non-volatile memory device on a block basis, and then searching for a bad memory cell by a performing an erase verifying operation, comparing a threshold voltage of the bad memory cell to a reference voltage to generate comparison results, and designating as a bad area one of the entire target memory block, and a sub-block of the target memory block in response to the comparison results.
摘要:
A nonvolatile memory device includes a memory block, a row decoder, a voltage generator and control logic. The memory block includes memory cells stacked in a direction intersecting a substrate, the memory block being divided into sub-blocks configured to be erased independently. The row decoder is configured to select the memory block by a sub-block unit. The voltage generator is configured to generate an erase word line voltage to be provided to a first word line of a selected sub-block of the sub-blocks and a cut-off voltage, higher than the erase word line voltage, to be provided to a second word line of the selected sub-block during an erase operation. The control logic is configured to control the row decoder and the voltage generator to perform an erase operation on the selected sub-block.
摘要:
A data management method of a nonvolatile memory device which includes a data cell area and a reference cell area includes selecting shared data from write data input to the memory device; generating reference data based on the shared data; and storing the write data in the data cell area and a first reference area of the reference cell area; and storing the reference data in a second reference area of the reference cell area.
摘要:
Methods of operating nonvolatile memory devices including a plurality of cell strings each having at least one ground selection transistor, a plurality of memory cells, and at least one string selection transistor, the operating methods including receiving a command and an address, determining a voltage applying time in response to the input command and address, and applying a specific voltage to memory cells of cell strings corresponding to the input address during the determined voltage applying time.
摘要:
A method of operating a memory controller includes reading data from a first block of a memory device; detecting degraded pages from a plurality of pages of the first block and counting a number of the degraded pages in the first block; and recharging or reclaiming the first block, which includes the degraded pages, based on the counted number of the degraded pages.
摘要:
A solid state drive (SSD) includes non-volatile memory devices and a RAID controller. Each of the non-volatile memory devices includes a memory cell array having a plurality of physical pages. The RAID controller performs a parity operation on 1st through (N−1)th physical page data to generate Nth physical page data, determines a physical page group including 1st through Nth physical pages that are selected from the 1st through Nth non-volatile memory devices, respectively, such that at least two of the 1st through Nth physical pages have different bit error rates from each other, and stores the 1st through Nth physical page data in the 1st through Nth physical pages, respectively.
摘要:
A method of operating a memory system includes receiving information data corresponding to a second program unit that is a part of a first program unit and a write request for the information data from a host; generating a codeword by performing error correction code (ECC) encoding on the received information data such that a partial parity bit corresponding to the information data among all parity bits of the codeword is updated; and providing a memory device with the generated codeword and a write command regarding the codeword.
摘要:
A storage device is provided as follows. A nonvolatile memory device includes blocks, each block having sub-blocks erased independently. A memory controller performs a garbage collection operation on the nonvolatile memory device by selecting a garbage collection victim sub-block among the sub-blocks and erasing the selected garbage collection victim sub-block to generate a free sub-block. The memory controller selects the garbage collection victim sub-block using valid page information of each sub-block and valid page information of memory cells adjacent to each sub-block.
摘要:
An erase method of a nonvolatile memory device includes setting an erase mode, and performing one of a normal erase operation and a quick erase operation according to the set erase mode. The normal erase operation is performed to set a threshold voltage of a memory cell to an erase state which is lower than a first erase verification level. The quick erase operation is performed to set a threshold voltage of a memory cell to a pseudo erase state which is lower than a second erase verification level. The second erase verification level is higher than the first erase verification level.
摘要:
A data write method of a nonvolatile memory device is provided which includes receiving write data to be stored in selected memory cells; reading data stored in the selected memory cells; processing the write data according to a plurality of data modulation manners to generate a plurality of modulated data values; calculating the number of flip bits and the number of switching bits when the write data and the plurality of modulated data values are overwritten on the selected memory cells, each flip bit indicating that a logical value of a selected memory cell is reversed and each switching bit indicating that a logical value of a selected memory cell is switched from a first logical value to a second logical value; and selecting one of the write data and the plurality of modulated data values according to calculating the number of flip bits and the number of switching bits.