Patent US2531009A successfully refreshed from Google Patents.
Patent US6460094B1 successfully refreshed from Google Patents.
US6460094B1
Expired / Lapsed
US
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Peripheral device configured to detect the type of interface to which it is connected and configuring itself accordingly
Assignee: Microsoft Technology Licensing LLC
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Filing: 1998-07-08
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Granted: 2002-10-01
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Expires: 2018-07-08
Abstract
Abstract A peripheral device is connectable to a computer having one of a first interface and a second interface. The first interface communicates with the peripheral device over a differential data connection having a first data conductor and a second data conductor. The second interface communicates with the peripheral device over a clock conductor and a single ended data connection which includes a data conductor. The peripheral device has first and second communication conductors configured for connection to the first and second data conductors in the differential data connection when the computer includes the first interface and is configured for connection to the first data conductor in the single ended data connection and the clock conductor when the computer is provided with the second interface. The peripheral device includes an interface detection component coupled to the first and second communication conductors and configured to detect which of the first and second interfaces the peripheral device is connected to. The peripheral device also includes a controller component configured to communicate between the peripheral device according to a protocol corresponding to the detected interface.
Inventors
- 👤 Mark T. Hanson
- 👤 Lord Nigel Featherston
- 👤 Nathan C. Sherman
- 👤 Victor P. Drake
- 👤 Keith Mullins
- 👤 David L. Holo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:04
CPC Classifications
G; G06; G06F; G06F13/00; G06F13/38; G06F13/40; G06F13/4063; G06F13/4068; G06F13/4086
Claims Analysis
Total Claims: 65
Claim 1
Independent Claim
209 words
A peripheral device connectable to a computer having one of a first interface and a second interface, the first interface communicating with the peripheral device over a differential data connection including a first data conductor and a second data conductor, and the second interface communicating with the peripheral device over a single ended data connection, including a first data conductor, and a clock conductor, the peripheral device comprising: first and second communication conductors configured for connection to the first and second data conductors in the differential data connection when the computer includes the first interface, and configured for connection to the first data conductor in the single ended data connection and the clock conductor when the computer includes the second interface; an interface detection component, coupled to the first and second communication conductors, configured to monitor the first and second communication conductors to detect which of the first and second interfaces the peripheral device is connected to and to provide a connection output indicative of the detected interface; and a controller component, coupled to the interface detection component, configured to communicate between the peripheral device and the computer over the first and second communication conductors according to a protocol corresponding to the detected interface based on the connection output.
Claim 2
Dependent Claim
209 words
A peripheral device connectable to a computer having one of a first interface and a second interface, the first interface communicating with the peripheral device over a differential data connection including a first data conductor and a second data conductor, and the second interface communicating with the peripheral device over a single ended data connection, including a first data conductor, and a clock conductor, the peripheral device comprising: first and second communication conductors configured for connection to the first and second data conductors in the differential data connection when the computer includes the first interface, and configured for connection to the first data conductor in the single ended data connection and the clock conductor when the computer includes the second interface; an interface detection component, coupled to the first and second communication conductors, configured to monitor the first and second communication conductors to detect which of the first and second interfaces the peripheral device is connected to and to provide a connection output indicative of the detected interface; and a controller component, coupled to the interface detection component, configured to communicate between the peripheral device and the computer over the first and second communication conductors according to a protocol corresponding to the detected interface based on the connection output.
Claim 3
Dependent Claim
123 words
The peripheral device of claim 1 wherein, when the computer includes the first interface, the first and second data conductors in the differential data connection in the computer are coupled to a first voltage potential with first and second resistive elements, respectively, and when the computer includes the second interface, the first data conductor in the single ended data connection and the clock conductor in the computer are pulled to a second voltage potential by third and fourth resistive elements, respectively, and wherein the interface detection component comprises: a signal detector coupled to the first and second communication conductors and configured to detect signal levels on the first and second communication conductors and provide the connection output based on the signal levels detected.
Claim 4
Dependent Claim
63 words
The peripheral device of claim 2 wherein the interface detection component comprises: a fifth resistive element; a sixth resistive element; a first selectable connection element selectively connecting the first communication conductor to a third voltage potential through the fifth resistive element; and a second selectable connection element selectively connecting the second communication conductor to the third voltage potential through the sixth resistive element.
Claim 5
Dependent Claim
20 words
The peripheral device of claim 3 wherein the second and third voltage potentials are associated with a first logic level.
Claim 6
Dependent Claim
41 words
The peripheral device of claim 4 wherein the interface connection component is configured to deselect the first and second selectable connection elements to disconnect the first and second communication conductors from the third voltage potential upon power-up of the peripheral device.
Claim 7
Dependent Claim
50 words
The peripheral device of claim 5 wherein the signal detector is configured to detect signal levels on the first and second communication conductors upon power-up of the peripheral device, when the first and second selectable connection elements are deselected and to provide the connection output based on the signal levels.
Claim 8
Dependent Claim
46 words
The peripheral device of claim 6 wherein the signal detector is configured to provide the connection output indicative of connection to the second interface when the signal level corresponding to at least one of the first and second communication conductors is at the first logic level.
Claim 9
Dependent Claim
67 words
The peripheral device of claim 7 wherein the interface detection component is configured to select the first selectable connection element and deselect the second connection element and wherein the signal detector is configured to provide the connection output indicative of connection to the second interface when the signal level corresponding to the first communication conductor is at a second logic level corresponding to the first voltage potential.
Claim 10
Dependent Claim
40 words
The peripheral device of claim 8 wherein the signal detector is configured to provide the connection output indicative of connection to the first interface when the signal level corresponding to the first communication conductor is at the first logic level.
Claim 11
Dependent Claim
96 words
The peripheral device of claim 8 wherein the interface detection component is configured to deselect the first selectable connection element and deselect the second connection element and wherein the signal detector is configured to provide the connection output indicative of connection to the first interface when the signal level corresponding to the first communication conductor is at the second logic level and to provide the connection output indicative of connection to the second interface when the signal level corresponding to at least one of the first and second communication conductors is at the first logic level.
Claim 12
Dependent Claim
27 words
The peripheral device of claim 10 wherein the first logic level corresponds to a logic one and wherein the second logic level corresponds to a logic zero.
Claim 13
Dependent Claim
46 words
The peripheral device of claim 1 wherein the controller component comprises: a first controller configured to control communication according to a first protocol corresponding to the first interface; and a second controller configured to control communication according to a second protocol corresponding to the second interface.
Claim 14
Dependent Claim
33 words
The peripheral device of claim 12 wherein the first controller is coupled to differential data pins providing differential data signals, the differential data pins being coupled to the first and second communication conductors.
Claim 15
Dependent Claim
43 words
The peripheral device of claim 13 wherein the second controller is coupled to first and second input/output (I/O) pins providing a first data signal and a clock signal, the first and second I/O pins being coupled to the first and second communication conductors.
Claim 16
Dependent Claim
55 words
The peripheral device of claim 14 and further comprising: a first switch coupled between a first of the differential data pins and the first communication conductor, the controller component being configured to selectively close the first switch when the interface detection component provides the connection output indicative of the detected interface being the first interface.
Claim 17
Dependent Claim
35 words
The peripheral device of claim 15 wherein the controller component is configured to open the first switch when the interface detection component provides the connection output indicative of the detected interface being the second interface.
Claim 18
Dependent Claim
55 words
The peripheral device of claim 16 and further comprising: a second switch coupled between a second of the differential data pins and the second communication conductor, the controller component being configured to selectively close the second switch when the interface detection component provides the connection output indicative of the detected interface being the first interface.
Claim 19
Dependent Claim
35 words
The peripheral device of claim 17 wherein the controller component is configured to open the second switch when the interface detection component provides the connection output indicative of the detected interface being the second interface.
Claim 20
Dependent Claim
43 words
The peripheral device of claim 15 wherein the second controller is configured to provide a high impedance signal on the first and second I/O pins when the interface detection component provides the connection output indicative of the detected interface being the first interface.
Claim 21
Dependent Claim
92 words
The peripheral device of claim 19 and further comprising: first and second resistive elements coupled between the first and second communication conductors and third and fourth I/O pins, respectively, wherein the controller component is configured to provide a signal on the third and fourth I/O pins at a high impedance state when the interface detection component provides the connection output indicative of the detected interface being the first interface and at a voltage level when the interface detection component provides the connection output indicative of the detected interface being the second interface.
Claim 22
Dependent Claim
199 words
A computer readable medium for use in a peripheral device connectable to a computer, the computer having one of a first interface and a second interface, the first interface communicating with the peripheral device over a differential data connection including a first data conductor and a second data conductor, and the second interface communicating with the peripheral device over a single ended data connection, including a first data conductor, and a clock conductor, the peripheral device including first and second communication conductors configured for connection to the first and second data conductors in the differential data connection when the computer includes the first interface, and configured for connection to the first data conductor in the single ended data connection and the clock conductor when the computer includes the second interface, the computer readable medium including instructions stored thereon which when executed by the peripheral device causes the peripheral device to execute the steps of: detecting which of the first and second interfaces the peripheral device is connected to by signal levels on the first and second communication conductors; and communicating with the computer over the first and second communication conductors according to a protocol corresponding to the detected interface.
Claim 23
Dependent Claim
199 words
A computer readable medium for use in a peripheral device connectable to a computer, the computer having one of a first interface and a second interface, the first interface communicating with the peripheral device over a differential data connection including a first data conductor and a second data conductor, and the second interface communicating with the peripheral device over a single ended data connection, including a first data conductor, and a clock conductor, the peripheral device including first and second communication conductors configured for connection to the first and second data conductors in the differential data connection when the computer includes the first interface, and configured for connection to the first data conductor in the single ended data connection and the clock conductor when the computer includes the second interface, the computer readable medium including instructions stored thereon which when executed by the peripheral device causes the peripheral device to execute the steps of: detecting which of the first and second interfaces the peripheral device is connected to by signal levels on the first and second communication conductors; and communicating with the computer over the first and second communication conductors according to a protocol corresponding to the detected interface.
Claim 24
Dependent Claim
58 words
The computer readable medium of claim 21 wherein detecting comprises: disconnecting the first and second communication conductors from a predetermined voltage potential; determining whether either of the first and second communication conductors is at a first logic level associated with the first voltage potential; and if so, determining that the peripheral device is connected to the second interface.
Claim 25
Dependent Claim
73 words
The computer readable medium of claim 22 wherein detecting further comprises: if neither of the first and second communication conductors is at the first logic level, connecting the first communication conductor to the first voltage potential through a first resistive element; determining whether the first communication conductor is at a second logic level associated with a second voltage potential; and if so, determining that the peripheral device is connected to the second interface.
Claim 26
Dependent Claim
34 words
The computer readable medium of claim 23 wherein detecting further comprises: if the first communication conductor is not at the second logic level, determining that the peripheral device is connected to the first interface.
Claim 27
Dependent Claim
50 words
The computer readable medium of claim 23 wherein detecting further comprises: if the first communication conductor is not at the second logic level, disconnecting the first communication conductor from the first voltage potential; and determining whether either of the first and second communication conductors are at the first voltage potential.
Claim 28
Dependent Claim
50 words
The computer readable medium of claim 25 wherein detecting further comprises: if either of the first and second communication conductors are at the first logic level, determining that the peripheral device is connected to the second interface; and otherwise, determining that the peripheral device is connected to the first interface.
Claim 29
Independent Claim
197 words
A method implemented by a peripheral device for detecting whether the peripheral device is connected to a first interface or a second interface in a computer, the first interface communicating with the peripheral device over a differential data connection including a first data conductor and a second data conductor, and the second interface communicating with the peripheral device over a single ended data connection, including a first data conductor, and a clock conductor, the peripheral device including first and second communication conductors configured for connection to the first and second data conductors in the differential data connection when the computer includes the first interface, and configured for connection to the first data conductor in the single ended data connection and the clock conductor when the computer includes the second interface, the method comprising: detecting which of the first and second interfaces the peripheral device is connected to by attempting to impart a signal level on at least one of the first and second communication conductors and detecting the signal level on at least one communication conductor; and communicating with the computer over the first and second communication conductors according to a protocol corresponding to the detected interface.
Claim 30
Independent Claim
197 words
A method implemented by a peripheral device for detecting whether the peripheral device is connected to a first interface or a second interface in a computer, the first interface communicating with the peripheral device over a differential data connection including a first data conductor and a second data conductor, and the second interface communicating with the peripheral device over a single ended data connection, including a first data conductor, and a clock conductor, the peripheral device including first and second communication conductors configured for connection to the first and second data conductors in the differential data connection when the computer includes the first interface, and configured for connection to the first data conductor in the single ended data connection and the clock conductor when the computer includes the second interface, the method comprising: detecting which of the first and second interfaces the peripheral device is connected to by attempting to impart a signal level on at least one of the first and second communication conductors and detecting the signal level on at least one communication conductor; and communicating with the computer over the first and second communication conductors according to a protocol corresponding to the detected interface.
Claim 31
Dependent Claim
56 words
The method of claim 27 wherein detecting comprises: disconnecting the first and second communication conductors from a predetermined voltage potential; determining whether either of the first and second communication conductors is at a first logic level associated with a first voltage potential; and if so, determining that the peripheral device is connected to the second interface.
Claim 32
Dependent Claim
71 words
The method of claim 28 wherein detecting further comprises: if neither of the first and second communication conductors is at the first logic level, connecting the first communication conductor to the first voltage potential through a first resistive element; determining whether the first communication conductor is at a second logic level associated with a second voltage potential; and if so, determining that the peripheral device is connected to the second interface.
Claim 33
Dependent Claim
32 words
The method of claim 29 wherein detecting further comprises: if the first communication conductor is not at the second logic level, determining that the peripheral device is connected to the first interface.
Claim 34
Dependent Claim
48 words
The method of claim 29 wherein detecting further comprises: if the first communication conductor is not at the second logic level, disconnecting the first communication conductor from the first voltage potential; and determining whether either of the first and second communication conductors are at the first voltage potential.
Claim 35
Dependent Claim
48 words
The method of claim 31 wherein detecting further comprises: if either of the first and second communication conductors are at the first logic level, determining that the peripheral device is connected to the second interface; and otherwise, determining that the peripheral device is connected to the first interface.
Claim 36
Dependent Claim
214 words
A peripheral device connectable to a computer having one of a first interface and a second interface, the first interface communicating with the peripheral device over a differential data connection including a first data conductor and a second data conductor, and the second interface communicating with the peripheral device over a single ended data connection, including a first data conductor, and a clock conductor, the peripheral device comprising: first and second communication conductors configured for connection to the first and second data conductors in the differential data connection when the computer includes the first interface, and configured for connection to the clock conductor and the first data conductor in the single ended data connection when the computer includes the second interface; an interface detection component, coupled to the first and second communication conductors, configured to detect which of the first and second interfaces the peripheral device is connected to by detecting a signal level on at least one of the communication conductors and to provide a connection output indicative of the detected interface; and a controller component, coupled to the interface detection component, configured to communicate between the peripheral device and the computer over the first and second communication conductors according to a protocol corresponding to the detected interface based on the connection output.
Claim 37
Dependent Claim
214 words
A peripheral device connectable to a computer having one of a first interface and a second interface, the first interface communicating with the peripheral device over a differential data connection including a first data conductor and a second data conductor, and the second interface communicating with the peripheral device over a single ended data connection, including a first data conductor, and a clock conductor, the peripheral device comprising: first and second communication conductors configured for connection to the first and second data conductors in the differential data connection when the computer includes the first interface, and configured for connection to the clock conductor and the first data conductor in the single ended data connection when the computer includes the second interface; an interface detection component, coupled to the first and second communication conductors, configured to detect which of the first and second interfaces the peripheral device is connected to by detecting a signal level on at least one of the communication conductors and to provide a connection output indicative of the detected interface; and a controller component, coupled to the interface detection component, configured to communicate between the peripheral device and the computer over the first and second communication conductors according to a protocol corresponding to the detected interface based on the connection output.
Claim 38
Dependent Claim
123 words
The peripheral device of claim 33 wherein, when the computer includes the first interface, the first and second data conductors in the differential data connection in the computer are coupled to a first voltage potential with first and second resistive elements, respectively, and when the computer includes the second interface, the first data conductor in the single ended data connection and the clock conductor in the computer are pulled to a second voltage potential by third and fourth resistive elements, respectively, and wherein the interface detection component comprises: a signal detector coupled to the first and second communication conductors and configured to detect signal levels on the first and second communication conductors and provide the connection output based on the signal levels detected.
Claim 39
Dependent Claim
63 words
The peripheral device of claim 34 wherein the interface detection component comprises: a fifth resistive element; a sixth resistive element; a first selectable connection element selectively connecting the first communication conductor to a third voltage potential through the fifth resistive element; and a second selectable connection element selectively connecting the second communication conductor to the third voltage potential through the sixth resistive element.
Claim 40
Dependent Claim
20 words
The peripheral device of claim 35 wherein the second and third voltage potentials are associated with a first logic level.
Claim 41
Dependent Claim
41 words
The peripheral device of claim 36 wherein the interface connection component is configured to deselect the first and second selectable connection elements to disconnect the first and second communication conductors from the third voltage potential upon power-up of the peripheral device.
Claim 42
Dependent Claim
50 words
The peripheral device of claim 37 wherein the signal detector is configured to detect signal levels on the first and second communication conductors upon power-up of the peripheral device, when the first and second selectable connection elements are deselected and to provide the connection output based on the signal levels.
Claim 43
Dependent Claim
46 words
The peripheral device of claim 38 wherein the signal detector is configured to provide the connection output indicative of connection to the second interface when the signal level corresponding to at least one of the first and second communication conductors is at the first logic level.
Claim 44
Dependent Claim
67 words
The peripheral device of claim 39 wherein the interface detection component is configured to select the first selectable connection element and deselect the second connection element and wherein the signal detector is configured to provide the connection output indicative of connection to the second interface when the signal level corresponding to the first communication conductor is at a second logic level corresponding to the first voltage potential.
Claim 45
Dependent Claim
40 words
The peripheral device of claim 40 wherein the signal detector is configured to provide the connection output indicative of connection to the first interface when the signal level corresponding to the first communication conductor is at the first logic level.
Claim 46
Dependent Claim
96 words
The peripheral device of claim 40 wherein the interface detection component is configured to deselect the first selectable connection element and deselect the second connection element and wherein the signal detector is configured to provide the connection output indicative of connection to the first interface when the signal level corresponding to the first communication conductor is at the second logic level and to provide the connection output indicative of connection to the second interface when the signal level corresponding to at least one of the first and second communication conductors is at the first logic level.
Claim 47
Dependent Claim
27 words
The peripheral device of claim 42 wherein the first logic level corresponds to a logic one and wherein the second logic level corresponds to a logic zero.
Claim 48
Dependent Claim
46 words
The peripheral device of claim 33 wherein the controller component comprises: a first controller configured to control communication according to a first protocol corresponding to the first interface; and a second controller configured to control communication according to a second protocol corresponding to the second interface.
Claim 49
Dependent Claim
33 words
The peripheral device of claim 44 wherein the first controller is coupled to differential data pins providing differential data signals, the differential data pins being coupled to the first and second communication conductors.
Claim 50
Dependent Claim
43 words
The peripheral device of claim 45 wherein the second controller is coupled to first and second input/output (I/O) pins providing a clock signal and a first data signal, the first and second I/O pins being coupled to the first and second communication conductors.
Claim 51
Dependent Claim
55 words
The peripheral device of claim 46 and further comprising: a first switch coupled between a first of the differential data pins and the first communication conductor, the controller component being configured to selectively close the first switch when the interface detection component provides the connection output indicative of the detected interface being the first interface.
Claim 52
Dependent Claim
35 words
The peripheral device of claim 47 wherein the controller component is configured to open the first switch when the interface detection component provides the connection output indicative of the detected interface being the second interface.
Claim 53
Dependent Claim
55 words
The peripheral device of claim 48 and further comprising: a second switch coupled between a second of the differential data pins and the second communication conductor, the controller component being configured to selectively close the second switch when the interface detection component provides the connection output indicative of the detected interface being the first interface.
Claim 54
Dependent Claim
35 words
The peripheral device of claim 49 wherein the controller component is configured to open the second switch when the interface detection component provides the connection output indicative of the detected interface being the second interface.
Claim 55
Dependent Claim
43 words
The peripheral device of claim 47 wherein the second controller is configured to provide a high impedance signal on the first and second I/O pins when the interface detection component provides the connection output indicative of the detected interface being the first interface.
Claim 56
Dependent Claim
92 words
The peripheral device of claim 51 and further comprising: first and second resistive elements coupled between the first and second communication conductors and third and fourth I/O pins, respectively, wherein the controller component is configured to provide a signal on the third and fourth I/O pins at a high impedance state when the interface detection component provides the connection output indicative of the detected interface being the first interface and at a voltage level when the interface detection component provides the connection output indicative of the detected interface being the second interface.
Claim 57
Dependent Claim
200 words
A computer readable medium for use in a peripheral device connectable to a computer, the computer having one of a first interface and a second interface, the first interface communicating with the peripheral device over a differential data connection including a first data conductor and a second data conductor, and the second interface communicating with the peripheral device over a single ended data connection, including a first data conductor, and a clock conductor, the peripheral device including first and second communication conductors configured for connection to the first and second data conductors in the differential data connection when the computer includes the first interface, and configured for connection to the clock conductor and the first data conductor in the single ended data connection when the computer includes the second interface, the computer readable medium including instructions stored thereon which when executed by the peripheral device causes the peripheral device to execute the steps of: detecting which of the first and second interfaces the peripheral device is connected to by monitoring a state of the first and second communication conductors; and communicating with the computer over the first and second communication conductors according to a protocol corresponding to the detected interface.
Claim 58
Dependent Claim
200 words
A computer readable medium for use in a peripheral device connectable to a computer, the computer having one of a first interface and a second interface, the first interface communicating with the peripheral device over a differential data connection including a first data conductor and a second data conductor, and the second interface communicating with the peripheral device over a single ended data connection, including a first data conductor, and a clock conductor, the peripheral device including first and second communication conductors configured for connection to the first and second data conductors in the differential data connection when the computer includes the first interface, and configured for connection to the clock conductor and the first data conductor in the single ended data connection when the computer includes the second interface, the computer readable medium including instructions stored thereon which when executed by the peripheral device causes the peripheral device to execute the steps of: detecting which of the first and second interfaces the peripheral device is connected to by monitoring a state of the first and second communication conductors; and communicating with the computer over the first and second communication conductors according to a protocol corresponding to the detected interface.
Claim 59
Dependent Claim
58 words
The computer readable medium of claim 53 wherein detecting comprises: disconnecting the first and second communication conductors from a predetermined voltage potential; determining whether either of the first and second communication conductors is at a first logic level associated with the first voltage potential; and if so, determining that the peripheral device is connected to the second interface.
Claim 60
Dependent Claim
73 words
The computer readable medium of claim 54 wherein detecting further comprises: if neither of the first and second communication conductors is at the first logic level, connecting the first communication conductor to the first voltage potential through a first resistive element; determining whether the first communication conductor is at a second logic level associated with a second voltage potential; and if so, determining that the peripheral device is connected to the second interface.
Claim 61
Dependent Claim
34 words
The computer readable medium of claim 55 wherein detecting further comprises: if the first communication conductor is not at the second logic level, determining that the peripheral device is connected to the first interface.
Claim 62
Dependent Claim
50 words
The computer readable medium of claim 55 wherein detecting further comprises: if the first communication conductor is not at the second logic level, disconnecting the first communication conductor from the first voltage potential; and determining whether either of the first and second communication conductors are at the first voltage potential.
Claim 63
Dependent Claim
50 words
The computer readable medium of claim 57 wherein detecting further comprises: if either of the first and second communication conductors are at the first logic level, determining that the peripheral device is connected to the second interface; and otherwise, determining that the peripheral device is connected to the first interface.
Claim 64
Independent Claim
184 words
A method implemented by a peripheral device for detecting whether the peripheral device is connected to a first interface or a second interface in a computer, the first interface communicating with the peripheral device over a differential data connection including a first data conductor and a second data conductor, and the second interface communicating with the peripheral device over a single ended data connection, including a first data conductor, and a clock conductor, the peripheral device including first and second communication conductors configured for connection to the first and second data conductors in the differential data connection when the computer includes the first interface, and configured for connection to the clock conductor and the first data conductor in the single ended data connection when the computer includes the second interface, the method comprising: detecting which of the first and second interfaces the peripheral device is connected to by detecting a signal level on at least one of the first and second communication conductors; and communicating with the computer over the first and second communication conductors according to a protocol corresponding to the detected interface.
Claim 65
Independent Claim
184 words
A method implemented by a peripheral device for detecting whether the peripheral device is connected to a first interface or a second interface in a computer, the first interface communicating with the peripheral device over a differential data connection including a first data conductor and a second data conductor, and the second interface communicating with the peripheral device over a single ended data connection, including a first data conductor, and a clock conductor, the peripheral device including first and second communication conductors configured for connection to the first and second data conductors in the differential data connection when the computer includes the first interface, and configured for connection to the clock conductor and the first data conductor in the single ended data connection when the computer includes the second interface, the method comprising: detecting which of the first and second interfaces the peripheral device is connected to by detecting a signal level on at least one of the first and second communication conductors; and communicating with the computer over the first and second communication conductors according to a protocol corresponding to the detected interface.
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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) | 2005-09-30 | 2006-04-01 | 2006-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-09-30 | 2010-04-01 | 2010-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-09-30 | 2014-04-01 | 2014-10-01 | $7700.00 | Window Closed / Lapsed |