Abstract:
A method of operating a semiconductor memory device can include receiving data, from a memory controller, at an Error Correction Code (ECC) engine included in the semiconductor memory device, the data including at least one predetermined error. Predetermined parity can be received at the ECC engine, where the predetermined parity is configured to correspond to the data without the at least one predetermined error. A determination can be made whether a number of errors in the data is correctable by the ECC engine using the data including the at least one predetermined error and the predetermined parity.
Abstract:
A semiconductor memory device includes a memory cell array in which a plurality of memory cells are arranged. The semiconductor memory device includes an error correcting code (ECC) circuit configured to generate parity data based on main data, write a codeword including the main data and the parity data in the memory cell array, read the codeword from a selected memory cell row to generate syndromes, and correct errors in the read codeword on a per symbol basis based on the syndromes. The main data includes first data of a first memory cell of the selected memory cell row and second data of a second memory cell of the selected memory cell row. The first data and the second data are assigned to one symbol of a plurality of symbols, and the first memory cell and the second memory cell are adjacent to each other in the memory cell array.
Abstract:
A semiconductor memory device includes a memory cell array, an error correction circuit and a control logic circuit. The error correction circuit performs an error correction code (ECC) encoding on write data to be stored in the memory cell array, and performs an ECC decoding on read data from the memory cell array. The control logic circuit controls access to the memory cell array and generates an engine configuration selection signal based on a command. The error correction circuit reconfigures a number of units for which ECC including the ECC encoding and the ECC decoding is performed, in response to the engine configuration selection signal.
Abstract:
A semiconductor memory device is provided. The semiconductor memory device includes a memory cell array, an input/output (I/O) gating circuit and an error correction circuit. The memory cell array includes a plurality of memory cells. The I/O gating circuit, before performing a normal memory operation on the memory cell array by a first unit, performs a cell data initializing operation by writing initializing bits in the memory cell array by a second unit different from the first unit. The error correction circuit performs an error correction code (ECC) encoding and an ECC decoding on a target page of the memory cell array by the second unit, based on the initializing bits. Therefore, power consumption in performing write operation may be reduced.
Abstract:
A semiconductor memory device includes a memory cell array and a test circuit. The test circuit reads data stream from the memory cell array, configured to, on comparing bits of each first unit in the data stream, compares corresponding bits in the first units as each second unit and outputs a fail information signal including pass/fail information on the data stream and additional information on the data stream, in a test mode of the semiconductor memory device.
Abstract:
A nonvolatile memory device includes a memory array having multiple nonvolatile memory cells, a first read circuit and a second read circuit. The first read circuit is configured to read first data from the memory array during a first read operation and to provide one or more protection signals indicating a victim period during the first read operation. The second read circuit is configured to read second data from the memory array during a second read operation and to provide one or more check signals indicating an aggressor period during the second read operation.
Abstract:
A semiconductor memory device includes a memory cell array, an error correction circuit, an error log register and a control logic circuit. The memory cell array includes a plurality of memory bank arrays and each of the memory bank arrays includes a plurality of pages. The control logic circuit is configured to control the error correction circuit to perform an ECC decoding sequentially on some of the pages designated at least one access address for detecting at least one bit error, in response to a first command received from a memory controller. The control logic circuit performs an error logging operation to write page error information into the error log register and the page error information includes a number of error occurrence on each of the some pages determined from the detecting.
Abstract:
A semiconductor memory device includes a memory cell array and a main controller. The memory cell array includes a plurality of memory bank arrays, and each of the memory bank arrays includes a plurality of pages. The main controller counts a number of accesses to a first memory region of the memory cell array, generates at least one victim address of at least one neighbor memory region that is adjacent to the first memory region and performs a scrubbing operation sub-pages of the pages corresponding to the at least one victim address when the counted number of accesses reaches a first reference value during a reference interval.
Abstract:
A semiconductor memory device includes a memory cell array, a control logic circuit, an error correction circuit and a first path selection circuit. The memory cell array includes a plurality of bank arrays. The control logic circuit controls access to the memory cell array and generates a density mode signal based on a command. The first path selection circuit selectively provides write data to the error correction circuit.
Abstract:
A semiconductor memory device includes a memory cell array, a data inversion/mask interface and a write circuit. The data inversion/mask interface receives a data block including a plurality of unit data, each of the plurality of unit data having a first data size, and the data inversion/mask interface selectively enables each data mask signal associated with each of the plurality of unit data based on a number of first data bits in a second data size of each unit data. The second data size is smaller than a first data size of the unit data. The write circuit receives the data block and performs a masked write operation that selectively writes each of the plurality of unit data in the memory cell array in response to the data mask signal.