In an embodiment, provided is a control device that operates: in a second mode where electric power to each of a processing unit and a second storage unit is stopped and is supplied to a first storage unit; and in a first mode where first control information controlling a state of the processing unit is stored in the second storage unit and electric power to each of the processing unit, and the first and second storage unit is stopped. When shifted from the first to second mode, the power supply control unit starts supply of electric power to each of the processing unit and the first storage unit. If the processing unit has been made to be in an operable first state, the processing unit creates and stores second control information in the first storage unit. Then, the power supply control unit stops electric power to the processing unit.