PROGRAMMING METHOD OF NONVOLATILE MEMORY DEVICE

摘要

PURPOSE: A programming method of a nonvolatile memory device is provided to improve the margins of logic status by programming program data on corresponding memory cells based on variable margins. CONSTITUTION: Program data is received(S110). Logic status corresponding to the received program data are detected(S120). The margins of the logic status are changed according to the detected result(S130). The program data is programmed on the corresponding memory cells based on the variable margins(S140). The memory cells store at least three bits.