Abstract: A counting circuit includes first to fifth flip-flops (FFs) and a logic operation unit. Each of the first to fourth FFs has an initial value based on a preset control signal input through a 4-bit set terminal and outputs a signal according to a clock signal. The fifth FF is coupled to the output terminal of the fourth FF and is configured to output the output signal of the fourth FF synchronously with the clock signal. The logic operation unit logically combines the output signals of the second to fourth FFs and outputs first and second counting signals.

Abstract: A counting circuit includes first to fifth flip-flops (FFs) and a logic operation unit. Each of the first to fourth FFs has an initial value based on a preset control signal input through a 4-bit set terminal and outputs a signal according to a clock signal. The fifth FF is coupled to the output terminal of the fourth FF and is configured to output the output signal of the fourth FF synchronously with the clock signal. The logic operation unit logically combines the output signals of the second to fourth FFs and outputs first and second counting signals.

Abstract: A method of programming a nonvolatile memory device includes an inputting step for inputting program data to a first latch of each of page buffers, and inputting redundancy data to a second latch of each of the page buffers, a verification result storage step for performing a program operation on selected memory cells using the program data stored in the first latch, performing a verification operation for the program operation, and storing a result of the verification operation in the first latch of each of the page buffers coupled with the selected memory cells, a verification result change step for changing the result stored in the first latch using the redundancy data stored in the second latch, and a verification check step for determining whether all data stored in the second latches, after the verification result change step, are program pass data.

Abstract: A counting circuit includes first to fifth flip-flops (FFs) and a logic operation unit. Each of the first to fourth FFs has an initial value based on a preset control signal input through a 4-bit set terminal and outputs a signal according to a clock signal. The fifth FF is coupled to the output terminal of the fourth FF and is configured to output the output signal of the fourth FF synchronously with the clock signal. The logic operation unit logically combines the output signals of the second to fourth FFs and outputs first and second counting signals.

Abstract: A method of operating a nonvolatile memory device comprises reading erase number information which is updated and stored whenever erasure is performed, setting program start voltages and step voltages based on the erase number information, and performing a program operation based on the program start voltages and the step voltages.

Abstract: A counting circuit includes first to fifth flip-flops (FFs) and a logic operation unit. Each of the first to fourth FFs has an initial value based on a preset control signal input through a 4-bit set terminal and outputs a signal according to a clock signal. The fifth FF is coupled to the output terminal of the fourth FF and is configured to output the output signal of the fourth FF synchronously with the clock signal. The logic operation unit logically combines the output signals of the second to fourth FFs and outputs first and second counting signals.