Data storage apparatus and control method thereof
First Claim
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; 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, the plurality of buffer units to switch output states to predetermined output states to reduce an amount of electric current flowing in the bus through the reference voltage supply unit.
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Abstract
The present invention provides a data storage apparatus capable of reducing an amount of electric current flowing in a bus. The data storage apparatus includes 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, a control unit adapted to control, in a case where the determination unit determines that a state of the bus is changed from an operating state to a nonoperating state, the plurality of buffer units to switch output states to predetermined output states to reduce an amount of electric current flowing in the bus through the reference voltage supply unit.
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Citations
20 Claims
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1. A data storage apparatus comprising:
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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; 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, the plurality of buffer units to switch output states to predetermined output states to reduce an amount of electric current flowing in the bus through the reference voltage supply unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of controlling a data storage apparatus, comprising the steps of:
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determining whether a bus having a plurality of signal lines is in an operating state in which the bus performs transmission and reception of data to and from a data storage unit; and
controlling, in a case where a state of the bus is determined in the determining step to be changed from the operating state to a nonoperating state, a plurality of buffer units respectively provided on the plurality of signal lines to switch output states to predetermined output states so as to reduce an amount of electric current flowing in the bus through a reference voltage supply unit adapted to supply a predetermined reference voltage to the bus. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification