Patent ID: 6940742

Claim:
A method of storing data in a ferroelectric memory device which includes a plurality of wordlines, a plurality of bitlines which intersect the plurality of wordlines, and a plurality of memory cells, each of the memory cells being provided at an intersecting point of one of the wordlines and one of the bitlines and including a ferroelectric capacitor to which voltage between one of the wordlines and one of the bitlines that intersect each other is directly applied, the method comprising: performing a program cycle or a read cycle for a plurality of selected memory cells selected from among the plurality of memory cells, each of the program cycle and the read cycle including a first period for writing first data into the selected memory cells and a second period for writing second data into the selected memory cells, and the second period being set after the first period; and writing the second data into the selected memory cells according to program data designated by the program request, when a program request occurs in the first period in the read cycle.