Method and apparatus for controlling power to a first and second circuit based on an operational mode and connecting state of an information processing apparatus
First Claim
1. An information processing apparatus connectable to a bus, the bus being connected to a further apparatus, said information processing apparatus comprising:
- a detecting circuit operable to detect whether the bus is connected to said information processing apparatus;
a control circuit;
a first circuit; and
a second circuit;
said control circuit being operable to control a power supply circuit such that (i) when said information processing apparatus is in a standby mode and said detecting circuit detects that the bus is connected to said information processing apparatus, the power supply circuit provides power to said first circuit and does not provide power to said second circuit, (ii) when said information processing apparatus is in the standby mode and said detecting circuit detects that the bus is not connected to said information processing apparatus, the power supply circuit does not provide power to said first circuit and does not provide power to said second circuit, (iii) when said information processing apparatus is in a power-on mode and said detecting circuit detects that the bus is connected to said information processing apparatus, the power supply circuit provides power to said first circuit and to said second circuit, and (iv) when said information processing apparatus is in the power-on mode and said detecting circuit detects that the bus is not connected to said information processing apparatus, said information processing apparatus returns to the standby mode and the power supply circuit does not provide power to said first circuit and does not provide power to said second circuit.
1 Assignment
0 Petitions
Accused Products
Abstract
An information processing apparatus is connectable to a bus that is connected to a further apparatus. A detecting circuit detects whether the bus is connected to the information processing apparatus. When the detecting circuit detects that the bus is connected to the information processing apparatus, a control circuit controls a power supply circuit such that the power supply circuit provides power to a further circuit. When the detecting circuit detects that the bus is not connected to the information processing apparatus, the control circuit controls the power supply circuit such that the power supply circuit does not provide the power to the further circuit.
-
Citations
23 Claims
-
1. An information processing apparatus connectable to a bus, the bus being connected to a further apparatus, said information processing apparatus comprising:
-
a detecting circuit operable to detect whether the bus is connected to said information processing apparatus; a control circuit; a first circuit; and a second circuit; said control circuit being operable to control a power supply circuit such that (i) when said information processing apparatus is in a standby mode and said detecting circuit detects that the bus is connected to said information processing apparatus, the power supply circuit provides power to said first circuit and does not provide power to said second circuit, (ii) when said information processing apparatus is in the standby mode and said detecting circuit detects that the bus is not connected to said information processing apparatus, the power supply circuit does not provide power to said first circuit and does not provide power to said second circuit, (iii) when said information processing apparatus is in a power-on mode and said detecting circuit detects that the bus is connected to said information processing apparatus, the power supply circuit provides power to said first circuit and to said second circuit, and (iv) when said information processing apparatus is in the power-on mode and said detecting circuit detects that the bus is not connected to said information processing apparatus, said information processing apparatus returns to the standby mode and the power supply circuit does not provide power to said first circuit and does not provide power to said second circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A method of controlling power within an information processing apparatus that is connectable to a bus, the bus being connected to a further apparatus, said method comprising:
-
detecting whether the bus is connected to the information processing apparatus; and controlling a power supply circuit such that (i) when the information processing apparatus is in a standby mode and the bus is detected as being connected to the information processing apparatus, the power supply circuit provides power to a first circuit located within the information processing apparatus and does not provide power to a second circuit located within the information processing apparatus, (ii) when the information processing apparatus is in the standby mode and the bus is detected as not being connected to the information processing apparatus, the power supply circuit does not provide the power to the first circuit and does not provide power to the second circuit, (iii) when the information processing apparatus is in a power-on mode and the bus is detected as being connected to the information processing apparatus, the power supply circuit provides power to the first circuit and to the second circuit, and (iv) when the information processing apparatus is in the power-on mode and the bus is detected as not being connected to the information processing apparatus, the information processing apparatus returns to the standby mode and the power supply circuit does not provide power to said first circuit and does not provide power to said second circuit. - View Dependent Claims (11, 12, 13, 14, 15, 16)
-
-
17. A recording medium recorded with a program for carrying out a method of controlling power within an information processing apparatus that is connectable to a bus, the bus being connected to a further apparatus, said method comprising:
-
detecting whether the bus is connected to the information processing apparatus; and controlling a power supply circuit such that (i) when the information processing apparatus is in a standby mode and the bus is detected as being connected to the information processing apparatus, the power supply circuit provides power to a first circuit located within the information processing apparatus and does not provide power to a second circuit located within the information processing apparatus, (ii) when the information processing apparatus is in the standby mode and the bus is detected as not being connected to the information processing apparatus, the power supply circuit does not provide the power to the first circuit and does not provide power to the second circuit, (iii) when the information processing apparatus is in a power-on mode and the bus is detected as being connected to the information processing apparatus, the power supply circuit provides power to the first circuit and to the second circuit, and (iv) when the information processing apparatus is in the power-on mode and the bus is detected as not being connected to the information processing apparatus, the information processing apparatus returns to the standby mode and the power supply circuit does not provide power to said first circuit and does not provide power to said second circuit. - View Dependent Claims (18, 19, 20, 21, 22, 23)
-
Specification