An electronic device includes an operation control circuit and an input data generation circuit. The operation control circuit generates a detection signal and an internal masking signal based on a masking signal and data during a write operation. The input data generation circuit converts input data based on the internal masking signal to generate converted data. In addition, the input data generation circuit selects and outputs either the converted data or drive data as the input data, which are input to a data storage circuit, based on the detection signal.