摘要:
A semiconductor memory device includes a memory cell array, a mode setting circuit, a parity data generation unit, and a data error detection and correction unit. The memory cell array has a plurality of first memory banks for storing normal data, and a predetermined number of second memory banks less than the number of the first memory banks for storing parity data according to control of a first flag signal. The mode setting circuit sets the first flag signal and a second flag signal controlling based on whether a separate memory bank is used to store the parity data in the second memory banks. The parity data generation unit receives normal write data during a write operation, generates parity data with respect to the normal write data in response to the second flag signal, and outputs the normal data and the parity data. The data error detection and correction unit receives normal read data and parity read data read from the memory cell array during a read operation, detects errors of the normal read data in response to the second flag signal, corrects the normal read data when the errors are detected, and outputs the corrected read data.
摘要:
In various methods of performing program operations in phase change memory devices, selected memory cells are repeatedly programmed to obtain resistance distributions having desired characteristics such as adequate sensing margins.
摘要:
A package map data outputting circuit of a semiconductor memory device embedded with a test circuit and a method for the same are provided. To improve the reliability of package map data and easily output a greater amount of the package map data, the package map data is stored to package map data registers at the wafer level and then output through the test circuit at the package level.
摘要:
A method for cleaning a filtering membrane, contaminated by contaminants including inorganic and organic materials during a fluid-filtering process, is disclosed, the method comprises cleaning the filtering membrane by using a first cleaning solution of pH 6˜9 so as to remove the organic material from the filtering membrane; and cleaning the filtering membrane by using a second acid cleaning solution so as to remove the inorganic material from the filtering membrane, wherein the cleaning method of the present invention uses the first cleaning solution having pH 6˜9 instead of a strong-alkaline cleaning solution so as to prevent the filtering membrane from being damaged, and also uses the cleaning solution maintained at a relatively low temperature instead of hot water so as to improve economical efficiency by reduction of energy consumption.
摘要:
Phase-change and resistance-change random access memory devices are provided which include a phase-change or resistance-change memory cell array and a sense amplifier that is configured to amplify data read from the phase-change memory cell array. These random access memory devices are configured to read data from a first word line of the phase-change or resistance-change memory cell array and to insert a dummy burst in which no data is read when a first boundary crossing occurs during a burst mode operation. Related methods of operating phase-change and/or resistance-change random access memory devices in burst mode are also provided.
摘要:
A semiconductor memory device includes a memory cell array, a mode setting circuit, a parity data generation unit, and a data error detection and correction unit. The memory cell array has a plurality of first memory banks for storing normal data, and a predetermined number of second memory banks less than the number of the first memory banks for storing parity data according to control of a first flag signal. The mode setting circuit sets the first flag signal and a second flag signal controlling based on whether a separate memory bank is used to store the parity data in the second memory banks. The parity data generation unit receives normal write data during a write operation, generates parity data with respect to the normal write data in response to the second flag signal, and outputs the normal data and the parity data. The data error detection and correction unit receives normal read data and parity read data read from the memory cell array during a read operation, detects errors of the normal read data in response to the second flag signal, corrects the normal read data when the errors are detected, and outputs the corrected read data.
摘要:
Provided are a nonvolatile memory and related method of programming same. The nonvolatile memory includes a memory cell array with a plurality of nonvolatile memory cells and a write circuit. The write circuit is configured to write first logic state data to a first group of memory cells during a first program operation using an internally generated step-up voltage, and second logic state data to a second group of memory cells during a second program operation using an externally supplied step-up voltage.
摘要:
A semiconductor memory device includes a memory cell array, a mode setting circuit, a parity data generation unit, and a data error detection and correction unit. The memory cell array has a plurality of first memory banks for storing normal data, and a predetermined number of second memory banks less than the number of the first memory banks for storing parity data according to control of a first flag signal. The mode setting circuit sets the first flag signal and a second flag signal controlling based on whether a separate memory bank is used to store the parity data in the second memory banks. The parity data generation unit receives normal write data during a write operation, generates parity data with respect to the normal write data in response to the second flag signal, and outputs the normal data and the parity data. The data error detection and correction unit receives normal read data and parity read data read from the memory cell array during a read operation, detects errors of the normal read data in response to the second flag signal, corrects the normal read data when the errors are detected, and outputs the corrected read data.
摘要:
Phase-change and resistance-change random access memory devices are provided which include a phase-change or resistance-change memory cell array and a sense amplifier that is configured to amplify data read from the phase-change memory cell array. These random access memory devices are configured to read data from a first word line of the phase-change or resistance-change memory cell array and to insert a dummy burst in which no data is read when a first boundary crossing occurs during a burst mode operation. Related methods of operating phase-change and/or resistance-change random access memory devices in burst mode are also provided.
摘要:
A number of read cycles applied to a selected memory location of a memory device, such as a variable-resistance memory device, is monitored. Write data to be written to the selected memory location is received. Selective pre-write verifying and writing of the received write data to the selected memory location occurs based on the monitored number of read cycles. Selectively pre-write verifying and writing of the received write data may include, for example, writing received write data to the selected memory cell region without pre-write verification responsive to the monitored number of read cycles being greater than a predetermined number of read cycles