In a storage apparatus: a write-address counter outputs a write address; an input-data inverter inverts input data to be inputted into a storage unit; an input-data selector selects one of the input data and the inverted input data on the basis of one or more first bits constituting the write address, and writes the one of the input data and the inverted input data in the storage unit on the basis of one or more second bits constituting the write address; a read-address counter outputs the read address; an output-data inverter inverts output data outputted from the storage unit on the basis of one or more third bits constituting the read address; and an output-data selector selects and outputs one of the output data and the inverted output data on the basis of one or more fourth bits constituting the read address.