摘要:
A data processing system includes an error checking and correction (ECC) encoding circuit, an integrated circuit memory and a code rate control circuit. The ECC encoding circuit is configured to selectively apply a plurality of unique ECC code rates to write data received by the data processing system during an operation to convert the write data into encoded data, in response to a code rate selection signal. The integrated circuit memory includes a plurality of storage regions therein. These storage regions are configured to receive respective portions of the encoded data from the ECC encoding circuit. The code rate control circuit is configured to generate the code rate selection signal. This code rate selection signal has a value that specifies the corresponding ECC code rate to be applied to respective portions of the write data.
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:
A storage device includes a non-volatile memory device outputting read data from a source area and a memory controller configured to execute an ECC operation on a plurality of vectors in the read data and to write the error-corrected read data into target area of the non-volatile memory device. The memory controller declares that a vector corresponding to a clean area is decoding pass without using a flag bit among the plurality of vectors during the error correction operation.
摘要:
A method may be provided to detect and correct data errors in a data system where a data message has been encoded with outer parity bits based on the data message using an outer encoding technique to provide an outer codeword and with inner parity bits based on the outer codeword using an inner encoding technique different than the outer encoding technique to provide an inner codeword. The method may include using the inner parity bits and an inner decoding technique corresponding to the inner encoding technique to perform inner decoding of the inner codeword. Responsive to performing inner decoding of the inner codeword without error, the data message may be extracted from a result of inner decoding the inner codeword without using the outer parity bits to decode the result of inner decoding the inner codeword. Related systems are also discussed.
摘要:
Memory systems and related defective block management methods are provided. Methods for managing a defective block in a memory device include allocating a defective block when a memory block satisfies a defective block condition. The allocated defective block is cancelled when the allocated defective block satisfies a defective block cancellation condition.
摘要:
A data processing system includes a memory configured to receive data and an encoder configured to encode data being transferred to the memory. The encoder includes an outer encoder configured to generate an outer codeword by encoding the data being transferred to the memory, and an inner encoder configured to generate a plurality of inner codewords by encoding the outer codeword.
摘要:
A nonvolatile memory device performs interleaving of data to be stored in each wordline (memory page), or of data to be stored in multiple wordlines (memory pages). The NVM includes a memory cell array, a storage circuit of a de-interleaving circuit, and a read/write circuit. The storage circuit of the de-interleaving circuit is configured to store program data to be written interleaved into the memory cell array. The read/write circuit is configured to control the interleaved/deinterleaved data input/output between the memory cell array and the storage circuit. The write operation unit size may be the same or different from the read operation unit size. The storage circuit stores the program data of integer k times of a common divisor of a read operation unit size and a write operation unit size of the read/write circuit, wherein k may equal ‘m’ (the number of bits stored in each memory cell of the NVM).
摘要:
A data processing system includes a memory configured to receive data and an encoder configured to encode data being transferred to the memory. The encoder includes an outer encoder configured to generate an outer codeword by encoding the data being transferred to the memory, and an inner encoder configured to generate a plurality of inner codewords by encoding the outer codeword.
摘要:
Provided is a data processing method in a semiconductor memory device. The data processing method arranges data, which is to be programmed in a row and column of a nonvolatile memory device, in a row or column direction. The data processing method encodes the programmed data into a modulation code in the row or column direction such that adjacent pairs of memory cells of the nonvolatile memory device are prevented from being programmed into first and second states.
摘要:
A memory device includes a plurality of multi-bit memory cells. A plurality of input data bits are encoded according to an error correction code to generate a codeword including a plurality of groups of bits. Respective ones of the plurality of multi-bit memory cells are programmed to represent respective ones of the groups of bits of the codeword. The groups of bits of the codeword may be groups of consecutive bits. In some embodiments, the multi-bit memory cells are each configured to store in bits and a length of the codeword is an integer multiple of m. Data may be read from the multi-bit memory cells in page units or cell units to recover the codeword, and the recovered code word may be decode according to the error correction code to recover the input data bits.