US 8,898,488 B2Granted

Processing device receiving different power during different states

AssigneeVIA Technologies, Inc.

InventorWoei-Harng Lin

Life of this patent

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Abstract

A processing device coupled to a host device via a connection device and including a connection port, a control unit and a switching unit is disclosed. The connection port connects to the connection device. The control unit controls a switching signal according to the kind of the connection device when the connection port is coupled between the connection port and the host device. The switching unit transmits an external power to the control unit according to the switching signal. When the switching unit transmits the external power to the control unit, the control unit operates according to the external power provided by an external device. When the switching unit does not transmit the external power to the control unit, the control unit operates according to a host power provided by the host device.

Claims21

Dependent claims

A processing device coupled to a host device via a connection device, comprising:

a connection port for connecting to the connection device;
a control unit controlling a switching signal according to the kind of the connection device when the connection is coupled between the connection port and the host device;
and
a switching unit transmitting an external power to the control unit according to the switching signal, wherein when the switching unit transmits the external power to the control unit, the control unit operates according to the external power provided by an external device, and when the switching unit does not transmit the external power to the control unit, the control unit operates according to a host power provided by the host device,
wherein when the connection device transmits the host power to the connection port and the switching unit receives the external power from the external device, the control unit controls the switching signal such that the switching unit stops transmitting the external power to the control unit.

2 more elements

An operation system comprising:

a host device comprising a first connection port and providing a host power;
and
a processing device coupled to the host device via a connection device and comprising:
a control unit controlling a first switching signal according to the kind of the connection device when the connection is coupled between the first connection port and a second connection port of the processing unit;
and
a first switching unit transmitting an external power to the control unit according to the first switching signal, wherein when the first switching unit transmits the external power to the control unit, the control unit operates according to the external power, and when the first switching unit does not transmit the external power to the control unit, the control unit operates according to the host power,
wherein when the connection device transmits the host power to the second connection port and the first switching unit receives the external power from the external device, the control unit controls the switching signal such that the switching unit stops transmitting the external power to the control unit.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/101,528Filed 5 May 2011
Priority: TW 99146830 A30 Dec 2010
Published: US 2012/0173893 A15 Jul 2012
Granted: 25 Nov 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification3 codes

G06F 1/26
Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00: power supply means, e.g. regulation thereof
G06F 1/266
Power supply means, e.g. regulation thereof: arrangements to supply power to external peripherals either directly from the computer or under…
G06F
Computing and data processing