摘要:
Programming a semiconductor memory device includes: performing a program loop using a blind program operation until the selected cell threshold voltages reach a first verification level; upon detecting a cell having the threshold voltage reaching the first verification level, verifying whether a cell having the threshold voltage reached a second verification level higher than the first verification level; upon verifying a cell having the threshold voltage reaching the second verification level, continuously performing program loops on cells having the first verification level as a target level and on cells having the second verification level as a target level; and upon verifying no cell having the threshold voltage reaching the second verification level, performing a program loop on memory cells having a target level higher than the first verification level, after programming the memory cells having the first verification level as the target level.
摘要:
According to an aspect of a program method of a nonvolatile memory device, a first program operation for programming a first data stored in a first latch may be performed and a cache program signal may be input for inputting a second data to be programmed subsequently. When the cache program signal is input, a determination is made as to whether a first program verify operation is being performed, and if so, the verify operation is stopped, the second data is input, and the first program verify operation is restarted.
摘要:
A voltage generation circuit comprises a voltage generation control unit configured to output one of a first voltage level determination signal having a fixed data value and a second voltage level determination signal having a varying data value in response to a selection signal, and a voltage generation unit configured to generate a voltage having a single pulse form or a voltage having a pulse form whose rising edge portion rises in incremental voltage steps in response to the voltage level determination signal outputted from the voltage generation control unit.
摘要:
In a method of determining a flag state of a non-volatile memory device, an arithmetic logic unit of a microcontroller is employed without an additional circuit. The method includes providing n flag state information about n flag cells, resetting an entire flag state information value, sequentially reading first to n flag state information, increasing the entire flag state information value depending on a read result of the first to n flag state information, and determining a flag state by comparing the entire flag state information value and a critical value.
摘要:
A semiconductor memory device is operated by, inter alia, sequentially inputting program data to page buffers coupled to selected pages of at least four planes in order to program selected memory cells included in the selected pages; performing a program operation on each of the four planes; performing a program verify operation on each of the four planes; and inputting new program data for next pages to the page buffers coupled to the next pages, after determining the selected pages of at least two of the four planes have passed the program verify operation, while performing the program operations and the program verify operations on the two remaining planes.
摘要:
A method of operating a nonvolatile memory device includes performing a reset operation for setting a level of a program voltage to a first level, performing a program operation and a verification operation on memory cells included in a first page of a first memory block while raising the program voltage from the first level, storing a level of the program voltage, supplied to the first page when memory cells programmed to have threshold voltages with at least a verification voltage are detected during the verification operation, as a second level, while raising the program voltage from the second level, performing the program operation and the verification operation on each of second to last pages of the first memory block, and after completing the program operation for the first memory block, performing the reset operation for setting the level of the program voltage to the first level.
摘要:
A method of operating a nonvolatile memory device includes performing a reset operation for setting a level of a program voltage to a first level, performing a program operation and a verification operation on memory cells included in a first page of a first memory block while raising the program voltage from the first level, storing a level of the program voltage, supplied to the first page when memory cells programmed to have threshold voltages with at least a verification voltage are detected during the verification operation, as a second level, while raising the program voltage from the second level, performing the program operation and the verification operation on each of second to last pages of the first memory block, and after completing the program operation for the first memory block, performing the reset operation for setting the level of the program voltage to the first level.
摘要:
According to an aspect of a program method of a nonvolatile memory device, a first program operation for programming a first data stored in a first latch may be performed and a cache program signal may be input for inputting a second data to be programmed subsequently. When the cache program signal is input, a determination is made as to whether a first program verify operation is being performed, and if so, the verify operation is stopped, the second data is input, and the first program verify operation is restarted.
摘要:
In a method of determining a flag state of a non-volatile memory device, an arithmetic logic unit of a microcontroller is employed without an additional circuit. The method includes providing n flag state information about n flag cells, resetting an entire flag state information value, sequentially reading first to n flag state information, increasing the entire flag state information value depending on a read result of the first to n flag state information, and determining a flag state by comparing the entire flag state information value and a critical value.
摘要:
A voltage generation circuit comprises a voltage generation control unit configured to output one of a first voltage level determination signal having a fixed data value and a second voltage level determination signal having a varying data value in response to a selection signal, and a voltage generation unit configured to generate a voltage having a single pulse form or a voltage having a pulse form whose rising edge portion rises in incremental voltage steps in response to the voltage level determination signal outputted from the voltage generation control unit.