Disclosed herein is a semiconductor storage device operable in a plurality of operation modes each having a separate maximum current consumption. The device includes: a data communication section configured to be capable of performing data communication in a plurality of communication modes; an attribute information storage section configured to store attribute information indicating the operation and communication modes; and a mode setting section configured to set the device to one of the operation modes and one of the communication modes. The data communication section transmits, to an electronic apparatus to which the device is attached, the information and receives from the apparatus a mode setting command for directing that the device be set to a combination of an operation mode and a communication mode selected from among the information. In accordance therewith, the mode setting section sets the device to the selected combination of modes.