Patent ID: 7594129
Filing Date: 2009-09-22
Classification: G06F,Y02D

Abstract:
1. A data storage apparatus comprising: a data storage unit adapted to store data; a plurality of buffer units, adapted to output data to the data storage unit through a bus, wherein the bus includes a plurality of signal lines, and wherein the plurality of buffer units are provided on the plurality of signal lines; a determination unit adapted to determine whether the bus is in an operating state in which transmission and reception of data to and from the data storage unit are performed; a reference voltage supply unit adapted to supply a predetermined reference voltage to the plurality of signal lines, wherein a voltage level of the predetermined reference voltage is lower than that of a first signal level and higher than that of a second signal level; and a control unit adapted to control, in a case where the determination unit determines that a state of the bus is changed from the operating state to a nonoperating state, an output state of the plurality of buffer units to shift to a predetermined output state so as to reduce an amount of electric current flowing in the bus through the reference voltage supply unit, the predetermined output state being a state in which a part of the plurality of buffers outputs at the first signal level and the other part of the plurality of buffers outputs at the second signal level.