Patent ID: 7376801
Filing Date: 2008-05-20
Classification: G11C

Abstract:
1. A data storage circuit comprising: a comparison section for reading out existing data stored in a storage element to compare said existing data and new data with each other prior to writing of said new data to said storage element, wherein: a control signal generating section for generating a readout control signal and a write control signal from a write signal input to said control signal generating section, said readout control signal for performing readout control of the existing data and said write control signal for performing write control of the new data, wherein the existing data and the new data are compared with each other in the comparison section in accordance with the write control signal from the control signal generating section; wherein said control signal generating section includes an AND logic gate for generating said readout control signal, and a NOR logic gate for generating said write control signal; and wherein the pulse of the readout control signal and write control signal are shorter than the pulse of the write signal input to said control signal generating section.