Patent US1367401A successfully refreshed from Google Patents.
Patent US6415342B1 successfully refreshed from Google Patents.
US6415342B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Universal serial bus controlled connect and disconnect
Assignee: Hewlett Packard Development Co LP
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Filing: 1999-07-27
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Granted: 2002-07-02
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Expires: 2019-07-27
Abstract
Abstract A device for connection to a Universal Serial Bus (USB) signals connection and disconnection from the bus without physically removing or reinserting the USB cable. The devices system controller controls the signaling so that connection or disconnection may be signaled in a variety of situations to accomplish certain tasks. Connection signaling may be delayed until power-up reset procedures are complete to prevent the device from being polled by the host. A disconnect then a connect may be signaled to help recover from certain error conditions. The same data lines may also be used for interfaces other than the USB bus. A switched connection from a USB data line through a pull-up resistor to a positive supply voltage. The switched connection is controlled by a logic function so that it will not be connected when the power supply on the USB cable is not present. The switched connection is also controlled by a logic signal that may be supplied by the USB device's system controller.
Inventors
- 👤 Mark A Wahl
- 👤 Mark J Jedrzejewski
- 👤 Gregory A Standiford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:32
CPC Classifications
G; G06; G06F; G06F13/00; G06F13/38; G06F13/40; G06F13/4063; G06F13/4068; G06F13/4072
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
98 words
A USB device capable of being connected to a USB having a data line, comprising: a controlled pull-up coupled to said data line when said USB device is connected to said USB, and wherein a voltage on said data line signals a connect and a disconnect to said USB when said USB device is connected said USB; wherein said controlled pull-up can signal both said connect and said disconnect while physically connected to said USB; and wherein said controlled pull-up is deactivated to allow said data line to be used with an interface that is not said USB.
Claim 2
Dependent Claim
98 words
A USB device capable of being connected to a USB having a data line, comprising: a controlled pull-up coupled to said data line when said USB device is connected to said USB, and wherein a voltage on said data line signals a connect and a disconnect to said USB when said USB device is connected said USB; wherein said controlled pull-up can signal both said connect and said disconnect while physically connected to said USB; and wherein said controlled pull-up is deactivated to allow said data line to be used with an interface that is not said USB.
Claim 3
Dependent Claim
36 words
The USB device of claim 1 wherein said controlled pull-up does not signal said connect when first physically connected to said USB bus and wherein said connect is signaled under the control of a system controller.
Claim 4
Dependent Claim
33 words
The USB device of claim 2 wherein said controlled pull-up does not signal said connect until a USB power supply line is energized, said USB power supply line coming from said USB bus.
Claim 5
Dependent Claim
22 words
The USB device of claim 1 wherein said controlled pull-up signals said disconnect and then said connect to recover from an error.
Claim 6
Independent Claim
80 words
A method of signaling a connection and a disconnection from a USB, comprising: controlling a pull-up coupled to a USB data line, wherein a voltage on said data line signals said connection and said disconnection to said USB; wherein both said connection and said disconnection ca be signaled while said data line is physically connected to said USB; and signaling said disconnection by deactivating said controlled pull-up while using said data line with an interface that is not said USB.
Claim 7
Independent Claim
80 words
A method of signaling a connection and a disconnection from a USB, comprising: controlling a pull-up coupled to a USB data line, wherein a voltage on said data line signals said connection and said disconnection to said USB; wherein both said connection and said disconnection ca be signaled while said data line is physically connected to said USB; and signaling said disconnection by deactivating said controlled pull-up while using said data line with an interface that is not said USB.
Claim 8
Dependent Claim
36 words
The method of claim 5 wherein said connection is not signaled when said data line is first physically connected to said USB bus and wherein said connection is signaled under the control of a system controller.
Claim 9
Dependent Claim
28 words
The method claim 6 wherein said connection is not signaled until a USB power supply line is energized, said USB power supply line coming from said USB bus.
Claim 10
Dependent Claim
18 words
The method of claim 5 , comprising: signaling said disconnection then said connection to recover from an error.
Claim 11
Dependent Claim
52 words
A USB device, comprising: an interface, said interface coupled of connection of a USB and said interface having a data line; a controlled pull-up coupled to said data line; and wherein said controlled pull-up is deactivated to allow said data line to be used with an interface that is not said USB.
Claim 12
Dependent Claim
52 words
A USB device, comprising: an interface, said interface coupled of connection of a USB and said interface having a data line; a controlled pull-up coupled to said data line; and wherein said controlled pull-up is deactivated to allow said data line to be used with an interface that is not said USB.
Claim 13
Dependent Claim
18 words
The USB device of claim 9 wherein said controlled pull-up is activated and deactivated by said USB device.
Claim 14
Dependent Claim
29 words
The USB device of claim 10 wherein said interface has a power supply line and said controlled pull-up is not activated when said power supply line is not energized.
Claim 15
Dependent Claim
17 words
The USB device of claim 9 wherein said controlled pull-up is deactivated to recover from an error.
Claim 16
Dependent Claim
29 words
The USB device of claim 9 wherein said controlled pull-up comprises: a switching device; and, a resistor, said resistor connected between said switching device and a positive supply voltage.
Claim 17
Dependent Claim
30 words
The USB device of claim 13 wherein said switching device is controlled by a Boolean logic function of a control signal and a power supply line energized by said interface.
Claim 18
Dependent Claim
22 words
The USB device of claim 13 wherein said Boolean logic function is a NAND gate and said switching device is a transistor.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-07-01 | 2005-12-31 | 2006-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-07-01 | 2009-12-31 | 2010-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-07-01 | 2013-12-31 | 2014-07-02 | $7700.00 | Window Closed / Lapsed |