DATA STORAGE CIRCUIT, DATA WRITE METHOD IN THE DATA STORAGE CIRCUIT, AND DATA STORAGE DEVICE

摘要

A data storage circuit for storing data and saving power. A data write method in the data storage circuit and a data storage device are also disclosed. Before writing new data in a storage element (M), existing data stored in the storage element (M) is read in and the existing data is compared to the new data. The data storage circuit is configured as follows. When the existing data coincides with the new data, no write is performed to the storage element (M). When the existing data does not coincide with the new data, the new data is written into the storage element (M). The data storage circuit is formed on a semiconductor substrate, so as to serve as a data storage device.