US20100225176A1 - Systems and methods for providing protection circuitry to selectively handle multiple cable-types through the same port - Google Patents

Systems and methods for providing protection circuitry to selectively handle multiple cable-types through the same port Download PDF

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Publication number
US20100225176A1
US20100225176A1 US12/477,547 US47754709A US2010225176A1 US 20100225176 A1 US20100225176 A1 US 20100225176A1 US 47754709 A US47754709 A US 47754709A US 2010225176 A1 US2010225176 A1 US 2010225176A1
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US
United States
Prior art keywords
power
headset
cable
port
electronic device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
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US12/477,547
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English (en)
Inventor
Rishabh Bhargava
Doug Farrar
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Apple Inc
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Apple Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Apple Inc filed Critical Apple Inc
Priority to US12/477,547 priority Critical patent/US20100225176A1/en
Assigned to APPLE INC. reassignment APPLE INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FARRAR, DOUG, BHARGAVA, RISHABH
Priority to CN200980157852.9A priority patent/CN102341971B/zh
Priority to PCT/US2009/069043 priority patent/WO2010104541A1/en
Priority to GB201115001A priority patent/GB2480043B/en
Priority to GB201310740A priority patent/GB2499952B8/en
Priority to DE112009004659.2T priority patent/DE112009004659B4/de
Publication of US20100225176A1 publication Critical patent/US20100225176A1/en
Priority to HK12107431.8A priority patent/HK1166886A1/zh
Priority to US13/797,850 priority patent/US8648501B2/en
Abandoned legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J4/00—Circuit arrangements for mains or distribution networks not specified as ac or dc
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/724—User interfaces specially adapted for cordless or mobile telephones
    • H04M1/72403—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality
    • H04M1/72409—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality by interfacing with external accessories
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
    • H04M1/6041—Portable telephones adapted for handsfree use
    • H04M1/6058—Portable telephones adapted for handsfree use involving the use of a headset accessory device connected to the portable telephone

Definitions

  • This relates to systems and methods for providing protection circuitry to selectively handle multiple cable-types through the same port of an electronic device.
  • this relates to systems and methods for providing protection circuitry to selectively handle power-providing cables and non-power providing cables through the same port of an electronic device.
  • electronic devices such as laptops, digital media players (e.g., an iPodTM made available by Apple Inc. of Cupertino, Calif.), cellular telephones, personal data assistants (“PDA's”), handheld gaming devices, and personal e-mail devices (e.g., a BlackberryTM made available by Research in Motion of Waterloo, Ontario) are getting smaller in size. This is often the case even though the internal circuitry and capabilities of these smaller electronic devices may be more advanced than their larger and older counterparts. As electronic devices become smaller in size, it can become necessary to conserve space on the electronic device. As one example of a way to conserve space, the number of ports available for coupling the electronic device to various cables can be reduced.
  • Systems and methods for providing protection circuitry to selectively handle multiple cable-types through the same port of an electronic device are provided.
  • systems and methods for providing protection circuitry to selectively handle power-providing cables and non-power providing cables that can couple to the same port of an electronic device are provided.
  • a power-providing cable e.g., a USB cable, or any other suitable power-providing cable
  • a non-power providing cable e.g., headphones, microphones, a user control interface, such as a remote controller that can include at least one user input, speakers, headset, or any other suitable non-power providing cable
  • the power-providing cable can include a Power Cable Transmit Chip (“Power Tx”) that can communicate with a Power Cable Receive Chip (“Power Rx”) of the electronic device.
  • the non-power providing cable can include a Headset Cable Transmit Chip (“Headset Tx”) that can communicate with a Headset Cable Receive Chip (“Headset Rx”) of the electronic device.
  • the Power Rx can communicate with the Power Tx to authenticate the power-providing cable and the Headset Rx can communicate with the Headset Tx to authenticate the non-power providing cable.
  • the same contact of the port can be used to receive a power signal (“PWR”) when a power-providing cable is coupled to the electronic device and to receive user input signals (“INPUT”) when a non-power providing cable is coupled to the electronic device.
  • PWR power signal
  • INPUT user input signals
  • the Power Rx and the Headset Rx of the electronic device can also be coupled to this contact.
  • the Power Rx can prevent the Headset Rx from operating correctly or can be damaging to the Headset Rx.
  • the input capacitance of the Power Rx can prevent the Headset Rx from properly authenticating the Headset Tx, or leakage current from the Power Rx can damage user input signals received from the non-power providing cable.
  • the PWR signal can cause electrical shorts or damage the Headset Rx if the Headset Rx does not have proper protection to handle a power signal.
  • the type of cable that is coupled to the electronic device can be determined by attempting to authenticate a particular type of cable. For example, the Power Rx chip can be disconnected and the Headset Rx chip can attempt to authenticate a Headset Tx chip. If a Headset Tx chip is successfully authenticated, the current settings can be maintained and the Power Rx chip can remain disconnected. If a Headset Tx chip is not successfully authenticated, the Power Rx chip can be reconnected and the Headset Rx chip can be disconnected. The Power Rx chip can then attempt to authenticate a Power Tx chip. If a Power Tx chip is authenticated, the current settings can be maintained and the Headset Rx chip can remain disconnected. If a Power Tx chip is not authenticated, the system can alternate between attempting to authenticate a Headset Tx chip and a Power Tx chip until one of them is successfully authenticated.
  • the type of cable that is coupled to the electronic device can be determined by identifying whether a PWR signal is received. If a PWR signal is received, this can indicate that a power-providing cable is coupled to the electronic device. Accordingly, the Headset Rx chip can be disconnected. If a PWR signal is not received, however, this can indicate that a non-power providing cable is coupled to the electronic device. In this scenario, the Power Rx chip can be disconnected.
  • FIGS. 1 and 2 show illustrative systems including power-providing cables in accordance with some embodiments of the invention
  • FIGS. 3 and 4 show illustrative systems including non-power providing cables in accordance with some embodiments of invention
  • FIG. 5 shows an illustrative power-providing cable and non-power providing cable that can couple to the same communication port in accordance with some embodiments of the invention
  • FIG. 6 shows a schematic view of a system for coupling multiple cable-types to the same communication port in accordance with some embodiments of the invention
  • FIG. 7 shows a schematic view of a system including protection circuitry for coupling multiple cable-types to the same communication port in accordance with some embodiments of the invention.
  • FIGS. 8 and 9 show illustrative processes for selectively handling multiple cable-types through the same communication port in accordance with some embodiments of the invention.
  • Electronic devices can couple to various types of cables through various types of ports.
  • electronic devices can couple to data and power-providing cables such as universal serial bus (“USB”) cables or any other suitable power-providing cables.
  • electronic devices can couple to non-power providing cables such as headphones, microphones, user control interfaces (e.g., remote controllers that can include at least one user input), speakers, or any other suitable non-power providing cables.
  • data and power-providing cables such as universal serial bus (“USB”) cables or any other suitable power-providing cables.
  • non-power providing cables such as headphones, microphones, user control interfaces (e.g., remote controllers that can include at least one user input), speakers, or any other suitable non-power providing cables.
  • the cables can couple to the electronic device through any suitable port such as, for example, a multi-contact connector port (e.g., a 30-pin connector port), a Firewire port, a USB port (e.g., a Type A port, a Type B port, Mini-A port, or a Mini-B port), a PS/2 port, an audio jack (e.g., a 3.5 millimeter or 2.5 millimeter jack), an Ethernet port, a telephone modem port, or any other suitable port.
  • a multi-contact connector port e.g., a 30-pin connector port
  • a Firewire port e.g., a 30-pin connector port
  • a USB port e.g., a Type A port, a Type B port, Mini-A port, or a Mini-B port
  • a PS/2 port e.g., a PS/2 port
  • an audio jack e.g., a 3.5 millimeter or 2.5 millimeter jack
  • Ethernet port e.
  • FIG. 1 shows an illustrative system 100 that can include power-providing cable 102 .
  • Power-providing cable 102 can couple to electronic device 104 through, for example, port 106 of electronic device 104 .
  • power-providing cable 102 in addition to providing power, can additionally communicate data to electronic device 104 .
  • power-providing cable 102 can include a USB cable that is capable of providing both data and power to electronic device 104 .
  • Electronic device 104 can include any suitable device that can couple to power-providing cable 102 such as, for example, a laptop computer, a desktop computer, a digital media player (e.g., an iPodTM), a cellular telephone, a PDA, a handheld gaming device, a personal e-mail device (e.g., a BlackberryTM), or any other suitable electronic device.
  • Port 106 can include any port suitable to receive power-providing cable 102 such as, for example a USB Type-A port, a USB Type-B port, a USB Mini-A port, a USB Mini-B port, or any other suitable port.
  • power-providing cable 102 can communicate four signals as inputs, outputs, or both to electronic device 104 .
  • power-providing cable 102 can communicate signals such as ground (e.g., GND), power (e.g., PWR), and two data lines (e.g., D+ and D ⁇ ).
  • Power-providing cable 102 may, for example, include four contacts, where each of the four signals can be provided to electronic device 104 through a separate contact.
  • the power signals, the data signals, or both can be supplied to electronic device 104 by a friendly device that is coupled to a plug on the other end of power-providing cable 102 .
  • FIG. 2 shows system 200 that can include power-providing cable 202 .
  • Plug 208 of power-providing cable 202 can be coupled to electronic device 204 at port 206 and plug 210 of power-providing cable 202 can be coupled to friendly device 212 .
  • power-providing cable 202 is illustrated in FIG.
  • friendly device 212 can be any suitable device for supplying power, data, or both to electronic device 204 such as, for example, a desktop computer, a laptop computer, or any other suitable friendly device.
  • power can be provided to electronic device 204 by coupling plug 210 to a power supply such as, for example, a wall socket or a battery.
  • power-providing cable 202 and electronic device 204 can each include one or more integrated circuits to allow them to communicate with one other.
  • power-providing cable 202 can include power-providing cable transmit chip (“Power Tx”) 230 and electronic device 204 can include power-providing cable receive chip (“Power Rx”) 232 .
  • Power Tx 230 is illustrated as being located in the middle of power-providing cable 202 , one skilled in the art can appreciate that Power Tx 230 may alternatively be located at either end (e.g., within plug 208 or plug 210 ) or anywhere along the length of power-providing cable 202 .
  • Power Tx 230 and Power Rx 232 can communicate in order to identify or authenticate one another.
  • Power Rx 232 can communicate with Power Tx 230 to determine the characteristics or identity of power-providing cable 202 , of a friendly device that is coupled to power-providing cable 202 (e.g., friendly device 212 ), of a power supply that is coupled to power-providing cable 202 , or any combination of the above.
  • Power Rx 232 can determine the characteristics of the power being supplied, the characteristics of the data being supplied, the operating environment of the friendly device, the type of friendly device, or any other suitable characteristics.
  • Power Tx 230 can fail to authenticate if, for example, it is determined that the cable, friendly device, or power supply is not appropriate for use with electronic device 204 .
  • the friendly device or power supply may be attempting to provide too much power, an improperly regulated power supply signal, or an otherwise potentially harmful power signal to electronic device 204 .
  • the friendly device may be identified as a device that is not approved for use with electronic device 204 (e.g., the friendly device may be manufactured by a non-approved third party vendor).
  • Power Rx 232 can prevent power, data, or both from being transmitted and/or received by electronic device 204 through power-providing cable 202 .
  • Power Rx 232 may, for example, allow power, data, or both to be transmitted and/or received from power-providing cable 202 . As another example, Power Rx 232 may instruct Power Tx 230 to regulate the power by providing it in a certain manner (e.g., by providing the power at a certain intensity, voltage, or current).
  • Power Tx 230 and Power Rx 232 can authenticate one another through the PWR signal.
  • Power Tx 230 may provide a series of pulses through the PWR signal to Power Rx 232 . If an appropriate series of pulses are received by Power Rx 232 (e.g., if a PWR signal of the appropriate frequency, amplitude, portraying the appropriate current spikes, or any combination of the above is received), Power Rx 232 may then authenticate Power Tx 230 .
  • an electronic device can be coupled to a non-power providing cable such as, for example, a cable associated with headphones, a microphone, a user control interface (e.g., a remote controller that can include at least one user input), speakers, a headset, or any other suitable non-power providing cable.
  • a non-power providing cable such as, for example, a cable associated with headphones, a microphone, a user control interface (e.g., a remote controller that can include at least one user input), speakers, a headset, or any other suitable non-power providing cable.
  • FIG. 3 shows non-power providing cable or headset cable 302 that can couple to electronic device 304 through port 306 of electronic device 304 .
  • the terms “headset” and “headset cable” are used throughout the disclosure for simplicity and clarity, but one skilled in the art can appreciate that any suitable non-power providing cable may alternatively be used without departing from the scope of the invention.
  • electronic device 304 can include any suitable electronic device that can couple to headset cable 302 such as, for example, a laptop computer, a desktop computer, a digital media player (e.g., an iPodTM), a cellular telephone, a PDA, a handheld gaming device, a personal e-mail device (e.g., a BlackberryTM), or any other suitable electronic device.
  • Port 306 can include any port suitable to receive headset cable 302 (e.g., a communications port).
  • headset cable 302 can include and couple electronic device 304 to, for example, headphones, speakers, a microphone, a user control interface (e.g., a remote controller that can include at least one user input), or any other suitable non-power providing friendly device or item.
  • FIG. 4 shows headset cable 402 that can couple to electronic device 404 and one or more of left headphone 418 , right headphone 420 , and user control interface 422 .
  • headset cable 402 with left headphone 418 , right headphone 420 , and user control interface 422
  • headset cable 402 may include any suitable combination of speakers, headphones, microphones, user inputs, or any other suitable non-power providing devices without departing from the scope of the invention.
  • User control interface 422 can include, for example, one or more buttons, touch screens, click wheels, switches, microphones, or any other suitable user input.
  • user control interface 422 may function as a remote controller that can allow a user to manipulate the playback of digital media files stored in electronic device 404 by, for example, pausing, stopping, playing, skipping, adjusting the volume, or otherwise suitably manipulating the playback of the files.
  • user control interface 422 can allow a user to control electronic device 404 by, for example, navigating menus or adjusting settings (e.g., power, volume, screen brightness, or any other suitable setting) of electronic device 404 .
  • user control interface 422 can function as a microphone that can receive the user's voice as an input.
  • headset cable 402 can communicate four signals as inputs, outputs, or both to electronic device 404 .
  • headset cable 402 can communicate signals such as ground (e.g., GND), left headphone output (e.g., LEFT), right headphone output (e.g., RIGHT), and INPUT.
  • LEFT and RIGHT can alternatively function as any other suitable input, output, or bi-directional data signal.
  • INPUT can include, for example, signals derived from user inputs received through user control interface 422 .
  • plug 408 of headset cable 402 can include four contacts for communicating each of these four signals to port 406 of electronic device 404 .
  • headset cable 402 and electronic device 404 can each include one or more integrated circuits to allow them to communicate with one other.
  • headset cable 402 can include a headset cable transmit chip (“Headset Tx”) 440 and electronic device 404 can include a headset cable receive chip (“Headset Rx”) 4442 .
  • Headset Tx 440 is illustrated as located in the middle of headset cable 402 in FIG. 4 , one skilled in the art can appreciate that Headset Tx 440 may alternatively be located in plug 408 , left headphone 418 , right headphone 420 , user control interface 422 , or anywhere along the length of headset cable 402 without departing from the scope of the invention.
  • Headset Tx 440 and Headset Rx 442 can communicate in order to identify or authenticate one another.
  • Headset Tx 440 can communicate a series of sine waves or any other suitable signals to Headset Rx 442 . If an appropriate series of sine waves are received by Headset Rx 442 (e.g., if the sine waves are of the appropriate frequency, amplitude, or both), Headset Rx 442 may then authenticate Headset Tx 440 .
  • an electronic device can couple to various types of power-providing cables and non-power providing cables. These cables can be very different in nature.
  • the cables may provide different types of functionality for the electronic device (e.g., transferring data, providing power, outputting audio, accepting user inputs, or any combination of the above), communicate different types of signals to the electronic device (e.g., GND, PWR, D+, D ⁇ , LEFT, RIGHT, or INPUT), and can require different types of ports to couple to the electronic device.
  • GND, PWR, D+, D ⁇ , LEFT, RIGHT, or INPUT can require different types of ports to couple to the electronic device.
  • an electronic device may need to include a plurality of different ports in order to allow it to couple to these different cables. These multiple ports can require a substantial amount of space, thus potentially preventing the electronic device from achieving a small and compact design.
  • a port that can couple to a variety of different cables can be provided. This can allow for an electronic device that can couple to a wide range of cables while requiring a fewer number of ports. In some embodiments, the electronic device may only require one port. This, in turn, may reduce the required size of the electronic device, thus allowing a smaller and more compact electronic device to be designed.
  • FIG. 5 shows system 500 that can include power-providing cable 502 and headset cable 504 .
  • power-providing cable 502 can include Power Tx 530 and headset cable 504 can include Headset Tx 540 .
  • Power-providing cable 502 and headset cable 504 can be designed such that they can each couple to the same port 506 of an electronic device 554 . Accordingly, electronic device 554 may only require a single port to allow it to couple to both power-providing cable 502 and headset cable 504 .
  • power-providing cable 502 , headset cable 504 , their associated plugs, and port 506 are illustrated in FIG. 5 as having a particular shape and design (e.g., they are illustrated as similar to a 3.5 millimeter plug and cable), the cables may alternatively include any suitable design, shape, or type of plug that can allow each cable to couple to the same port.
  • the cables can alternatively include a plug that is round in shape (e.g., PS/2), rectangular in shape (e.g., FireWire or USB Type-A), square in shape (e.g., USB Type-B, Ethernet plug, or telephone modem), trapezoidal in shape (e.g., D-Sub), or any other suitable shape or design.
  • a plug that is round in shape (e.g., PS/2), rectangular in shape (e.g., FireWire or USB Type-A), square in shape (e.g., USB Type-B, Ethernet plug, or telephone modem), trapezoidal in shape (e.g., D-Sub), or any other suitable shape or design.
  • a power-providing cable and a headset cable may each include four contacts that can communicate four signals, although each cable may alternatively include any other suitable number of contacts or signals.
  • power-providing cable 502 can include plug 505 with a D ⁇ contact 508 , D+ contact 510 , GND contact 512 , and PWR contact 514 . Each of these contacts of power-providing cable 502 can be separated by an insulating ring 516 .
  • headset cable 504 can include a plug 515 with a LEFT contact 518 , RIGHT contact 520 , GND contact 522 , and INPUT contact 524 . Each of these contacts of headset cable 504 can be separated by an insulating ring 526 .
  • Port 506 may similarly contain four contacts (e.g., contacts 558 , 560 , 562 , and 564 ) such that, when either plug 505 of power-providing cable 502 or plug 515 of headset cable 504 is inserted into port 506 , the contacts of port 506 and the contacts of the inserted cable may electrically couple to one another. The electrical coupling of the contacts can then allow the appropriate signals to be communicated from the cable, through port 506 , and to other portions of electronic device 554 .
  • contacts 558 , 560 , 562 , and 564 e.g., contacts 558 , 560 , 562 , and 564
  • contact 558 of port 506 can receive the D ⁇ signal or the LEFT signal
  • contact 560 of port 506 can receive the D+ signal or the RIGHT signal
  • contact 562 of port 506 can receive the GND signal
  • contact 564 of port 506 can receive the PWR signal or the INPUT signal.
  • FIG. 6 shows a schematic view of system 600 of an electronic device 654 including a port 606 that can couple multiple power-providing cables and headset cables to the same port.
  • Port 606 can include contact 658 , contact 660 , contact 662 , and contact 664 that may, for example, correspond to contact 558 , contact 560 , contact 562 , and contact 564 of port 506 of FIG. 5 .
  • Signals communicated through contact 658 e.g., D ⁇ or LEFT
  • contact 660 e.g., D+ or RIGHT
  • processor 602 may manage the data that is communicated through the D ⁇ and D+ signals.
  • processor 602 may control the audio signals that are output through the LEFT and RIGHT signals.
  • Contact 662 can be coupled to GND, and can provide a GND signal for a power-providing cable or a headset cable that is coupled to system 600 .
  • contact 664 can receive a PWR signal from the power-providing cable.
  • contact 664 can receive an INPUT signal from the headset cable.
  • the signal received through contact 664 can split and go through Power Rx 632 and Headset Rx 642 .
  • Power Rx 632 and Headset Rx 642 can correspond, respectively, to chips such as Power Rx 232 of FIG. 2 and Headset Rx 442 of FIG. 4 .
  • the Power Tx chip of this cable can communicate with Power Rx 632 through the PWR signal to authenticate the power-providing cable.
  • the Headset Tx chip of this cable can communicate with Headset Rx 642 through the INPUT signal to authenticate the headset cable.
  • one of these chips may be disconnected when a cable has been coupled to system 600 . Allowing both the Headset Rx 642 and Power Rx 632 to remain coupled to contact 664 may prevent a successful authentication of a cable or allow an unnecessary PWR signal to potentially damage the system.
  • Power Rx 632 may include a particular amount of capacitance at its input. If Power Rx 632 , and thus its input capacitance, is not disconnected from Headset Rx 642 , this input capacitance may prevent successful authentication of a headset cable. This can occur since a Headset Tx chip in a headset cable may transmit a series of sine waves to Headset Rx 642 in an attempt to authenticate itself. The input capacitance or Power Rx 632 may, however, detrimentally cause the transmitted sine wave to be absorbed or altered. Thus, although the Headset Tx chip may have originally transmitted an appropriate sine wave, Headset Rx 642 may instead receive an altered, inappropriate sine wave and thus may not authenticate the Headset Tx chip.
  • Power Rx 632 may have leakage current that can prevent user inputs received from a headset cable (e.g., received from user control interface 422 of FIG. 4 ) from functioning properly. Accordingly, when a headset cable is coupled to system 600 , Power Rx 632 can be disconnected from contact 664 to prevent this leakage current from potentially harming the operation of the headset cable.
  • a headset cable e.g., received from user control interface 422 of FIG. 4
  • Power Rx 632 can be disconnected from contact 664 to prevent this leakage current from potentially harming the operation of the headset cable.
  • a PWR signal can be provided to both Power Rx 632 and Headset Rx 642 .
  • Headset Rx 642 may be damaged by the PWR signal.
  • the PWR signal may cause damaging shorts or otherwise harm Headset Rx 642 .
  • Headset Rx 642 can be disconnected from contact 664 when a power-providing cable is coupled to system 600 .
  • FIG. 7 shows a schematic view of system 700 for electronic device 754 that can include port 706 .
  • System 700 can include protection circuitry such as, for example, Power Control 750 and Headset Control 760 .
  • Power Control 750 may disconnect Power Rx 732 from contact 764 when a headset cable is coupled to system 700 .
  • Headset Control 760 may disconnect Headset Rx 742 from contact 764 when a power-providing cable is coupled to system 700 .
  • processor 702 can send instructions to Power Control 750 through Control Line 752 for directing Power Control 750 to disconnect Power Rx 732 .
  • processor 702 can send instructions to Headset Control 760 through Control Line 762 for directing Headset Control 760 to disconnect Headset Rx 742 .
  • Headset Control 760 may not be included in system 700 .
  • system 700 can remove one or more of the components illustrated in FIG. 7 , can include other components not illustrated in FIG. 7 , can include several instances of the components shown in FIG. 7 , or may rearrange various electrical connections or contacts without departing from the scope of the invention.
  • additional circuitry can be added or contact numbers may be rearranged without departing from the scope of the invention.
  • system 700 can determine when a cable has been coupled to system 700 .
  • processor 702 can analyze contact 758 or contact 760 to determine if a cable is coupled to system 700 . When it has been determined that a cable is connected to system 700 , system 700 can then determine what type of cable has been connected. Once the cable-type has been determined, system 700 can determine whether to disconnect Power Rx 732 or Headset RX 742 .
  • the cable-type can be determined by attempting to authenticate a particular transmit chip.
  • system 700 can “assume” (e.g., through software, an algorithm, or both) that a headset cable is coupled to the system and attempt to authenticate a Headset Tx chip.
  • System 700 can thus direct Power Control 750 to disconnect Power Rx 732 , and then attempt to authenticate a Headset Tx chip with Headset Rx 742 . If a Headset Tx chip successfully authenticates, the system can remain with its current settings (e.g., can remain with Power Rx 732 disconnected).
  • system 700 can then “assume” (e.g., through software, an algorithm, or both) that a power-providing cable is coupled to the system. Accordingly, system 700 can reconnect Power Rx 732 and then disconnect Headset Rx 742 . System 700 can then attempt to authenticate a Power Tx chip with Power Rx 732 . In some embodiments, system 700 can continue to alternate between attempting to authenticate a Headset Tx chip and a Power Tx chip until a successful authentication is completed.
  • Various ways in which a system can determine a cable-type by attempting to authenticate a Power Tx or Headset Tx chip is discussed in more detail with respect to FIG. 8 and in the descriptions to follow.
  • the cable-type can be determined by identifying whether or not a PWR signal is present. If a PWR signal is present, the system can determine that a power-providing cable is coupled to the system. If a PWR signal is not present, the system can then determine that a headset cable is coupled to the system.
  • a system can determine a cable-type by identifying whether a PWR signal is present is discussed in more detail with respect to FIG. 9 and in the descriptions to follow.
  • FIG. 8 shows process 800 that can identify what cable-type is coupled to a system by attempting to authenticate a Power Tx chip or a Headset Tx Chip.
  • Process 800 can begin at step 802 .
  • process 800 can determine whether a cable is coupled to the system. For example, as described above, a processor can analyze contacts of a port (e.g., contact 758 or contact 760 of FIG. 7 ) to determine whether a cable is coupled to that port. If a cable is not coupled to the system, process 800 can continue to repeat steps 802 and 804 until a cable is coupled to the system.
  • a port e.g., contact 758 or contact 760 of FIG. 7
  • process 800 can disconnect the Power Rx chip (e.g., Power Rx 732 of FIG. 7 ) at step 806 .
  • a processor can supply a signal through a control line (e.g., Control Line 752 of FIG. 7 ) to a Power Rx Control System (e.g., Power Control 750 of FIG. 7 ).
  • the signal supplied by the processor can then direct the Power Rx Control System to disconnect the Power Rx chip from the system.
  • the Power Rx chip may then be disabled from preventing the successful authentication of a Headset Tx chip or from creating undesirable leakage current.
  • process 800 can attempt to authenticate a Headset Tx chip (e.g., Headset Tx 540 of FIG. 5 ).
  • a Headset Rx chip of the system e.g., Headset Rx 742 of FIG. 7
  • the Headset Rx chip can then analyze any signals that are received. If a received signal includes a series of appropriate sine waves (e.g., a series of sine waves of the appropriate frequency, amplitude, or any combination of the above) the Headset Rx chip can authenticate the Headset Tx chip. If the received signal does not include a series of appropriate sine waves, a Headset Tx chip may not be authenticated.
  • a Headset Tx chip If a Headset Tx chip is authenticated, the system can keep its current settings at step 810 .
  • successfully authenticating a Headset Tx chip can indicate that a headset cable (or other appropriate non-power providing cable) has been coupled to the system. Accordingly, by keeping its current settings, process 800 can keep a Power Rx chip disconnected from the system, thus preventing undesirable input capacitance or leakage current from the Power Rx chip from harming the operation of the headset cable and Headset Rx chip.
  • successfully authenticating a Headset Tx chip can also indicate that the headset cable is appropriate for use with the system (e.g., the headset cable is not damaging to the system, or was provided by an approved vendor).
  • Process 800 can then end at step 812 .
  • process 800 can disconnect the Headset Rx chip (e.g., Headset Rx 742 of FIG. 7 ) at step 814 and then reconnect the Power Rx chip (e.g., Power Rx 732 of FIG. 7 ) at step 816 .
  • a processor can send instructions through a control line (e.g., Control Line 762 of FIG. 7 ) to a Headset Rx Control System (e.g., Headset Control 760 of FIG. 7 ) for directing the Headset Rx Control System to disconnect the Headset Rx.
  • the processor can send instructions through a control line (e.g., Control Line 752 of FIG. 7 ) to a Power Rx Control System (e.g., Power Control 750 of FIG. 7 ) for directing it to reconnect the Power Rx chip.
  • process 800 can attempt to authenticate a Power Tx chip (e.g., Power Tx 530 of FIG. 5 ).
  • a Power Rx chip of the system e.g., Power Rx 732 of FIG. 7
  • the Power Rx chip can then analyze any signals that are received. If a received signal includes a series of appropriate PWR signal pulses (e.g., a PWR signal of the appropriate frequency, amplitude, portraying the appropriate current spikes, or any combination of the above) the Power Rx chip can authenticate the Power Tx chip. If the received signal does not include a series of appropriate sine waves, a Power Tx chip may not be authenticated.
  • process 800 can keep its current settings at step 810 . Similar to the authentication of a Headset Tx chip at step 808 , successfully authenticating a Power Tx chip can indicate that a power-providing cable has been coupled to the system. Accordingly, by keeping the current settings and leaving the Headset Rx chip disconnected from the system, the Headset Rx chip can be protected from accidental harm caused by power supplied through the power-providing cable. In some embodiments, the successful authentication can also indicate that an appropriate power-providing cable (e.g., a cable providing an appropriate amount of power or a properly regulated power supply, or a cable that may be provided by an approved vendor) has been coupled to the system. Process 800 can then end at step 812 .
  • an appropriate power-providing cable e.g., a cable providing an appropriate amount of power or a properly regulated power supply, or a cable that may be provided by an approved vendor
  • the Headset Rx chip (e.g., Headset Rx 742 of FIG. 7 ) can be reconnected at step 820 .
  • a Headset Rx Control System e.g., Headset Control 760 of FIG. 7
  • failing to authenticate either a Headset Tx chip or a Power Tx can indicate, for example, that an error has occurred in the system.
  • a cable may have been coupled to the system that has a faulty Headset Tx chip or a faulty Power Tx chip.
  • an unidentifiable or unknown cable-type may have been coupled to the system.
  • one end of a cable may be coupled to the system, but the other end of the cable may not be attached to anything. Accordingly, since the power-providing cable is not attached to a power source, the power-providing cable may be unable to provide an appropriate series of PWR signal pulses and the authentication may fail. Accordingly, when both a Headset Tx chip and a Power Tx chip fail to authenticate, process 800 can continue to loop through steps 806 , 808 , 814 , 816 , 818 , and 820 and alternate between attempting to authenticate a Headset Tx chip and a Power Tx chip. Once a Headset Tx chip or Power Tx chip does successfully authenticate, the system can keep its current settings at step 810 and then end at step 812 .
  • steps of the processes discussed herein can be omitted, modified, combined, or rearranged, and any additional steps can be performed without departing from the scope of the invention.
  • the order of steps, such as steps 814 and 816 can be switched, thus resulting in the reconnecting of the Power Rx chip before the disconnecting of the Headset Rx chip.
  • steps such as steps 814 and 820 can be omitted. For example, if the system contains a Headset Rx chip that has internal protection to prevent the chip from being harmed by a PWR signal, then it may not be necessary to disconnect and reconnect the Headset Rx chip at step 814 and 820 .
  • these steps can be reversed or subject to other conditions. For example, when an electronic device is turned on, there may be a higher likelihood that a user will desire to listen to music instead of trying to recharge the electronic device. Accordingly, since it may be more likely that a headset is coupled to the electronic device, the system can be configured to first check whether a Headset Rx chip can be authenticated when the electronic device is turned on.
  • the system can be configured to first check whether a Power Rx chip will authenticate when the system is turned off.
  • the device may be configured to only check whether a Power Rx chip will authenticate and to not attempt to authenticate a Headset Rx chip.
  • FIG. 9 shows process 900 that can identify what cable-type has been coupled to a system by determining whether a PWR signal is present.
  • Process 900 may, for example, be used in addition to process 800 or in place of process 800 .
  • Process 900 can begin at step 902 .
  • process 900 can determine whether a cable is coupled to the system. For example, similar to process 800 of FIG. 8 , a processor can analyze contacts of a port (e.g., contact 758 or contact 760 of FIG. 7 ) to determine whether a cable is coupled to that port. If a cable is not coupled to the system, process 900 can continue to repeat steps 902 and 904 until a cable is coupled to the system.
  • a port e.g., contact 758 or contact 760 of FIG. 7
  • process 900 can determine whether a PWR signal is being received at step 906 .
  • the contacts of the port to which the cable is coupled can be analyzed to determine whether a PWR signal is present (e.g., contact 764 of FIG. 7 can be analyzed).
  • a PWR signal is not present at step 906 , this can indicate that a headset cable (or other suitable non-power providing cable) may be coupled to the system. Accordingly, the Power Rx chip (e.g., Power Rx 732 of FIG. 7 ) can be disconnected at step 908 . Disconnecting the Power Rx chip can then prevent undesirable leakage current or input capacitance from affecting or harming the performance of the Headset Rx chip and headset cable. Process 900 can then end at step 912 .
  • the Power Rx chip e.g., Power Rx 732 of FIG. 7
  • Disconnecting the Power Rx chip can then prevent undesirable leakage current or input capacitance from affecting or harming the performance of the Headset Rx chip and headset cable.
  • Process 900 can then end at step 912 .
  • a PWR signal is present at step 906 , this can indicate that a power-providing cable may be coupled to the system. Accordingly, the Power Rx chip can be connected at step 910 . Process 900 can then end at step 912 .
  • a Headset Rx chip may be connected or disconnected in addition to the Power Rx chip.
  • the PWR signal may cause electrical shorts or otherwise damage the Headset Rx chip.
  • process 900 may additionally disconnect the Headset Rx chip at optional step 914 when a PWR signal is present.
  • the Headset Rx chip can be reconnected at optional step 916 .
  • a computer program product that includes a machine readable and/or usable medium.
  • a computer usable medium may consist of a read only memory device, such as a CD ROM disk or conventional ROM devices, or a random access memory, such as a hard drive device or a computer diskette, or flash memory device having a computer readable program code stored thereon.

Landscapes

  • Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Power Sources (AREA)
  • Protection Of Static Devices (AREA)
  • Headphones And Earphones (AREA)
US12/477,547 2009-03-09 2009-06-03 Systems and methods for providing protection circuitry to selectively handle multiple cable-types through the same port Abandoned US20100225176A1 (en)

Priority Applications (8)

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US12/477,547 US20100225176A1 (en) 2009-03-09 2009-06-03 Systems and methods for providing protection circuitry to selectively handle multiple cable-types through the same port
CN200980157852.9A CN102341971B (zh) 2009-03-09 2009-12-21 用于提供保护电路以通过相同端口选择性地处理多种电缆类型的系统和方法
PCT/US2009/069043 WO2010104541A1 (en) 2009-03-09 2009-12-21 Systems and methods for providing protection circuitry to selectively handle multiple cable-types through the same port
GB201115001A GB2480043B (en) 2009-03-09 2009-12-21 Systems and methods for providing protection circuitry to selectively handle multiple cable-types through the same port
GB201310740A GB2499952B8 (en) 2009-03-09 2009-12-21 Systems and methods for providing protection circuitry to selectively handle multiple cable-types through the same port
DE112009004659.2T DE112009004659B4 (de) 2009-03-09 2009-12-21 Systeme und verfahren zur bereitstellung einer schutzschaltung zur selektiven handhabung von mehreren kabeltypen über denselben anschluss
HK12107431.8A HK1166886A1 (zh) 2009-03-09 2012-07-30 用於提供保護電路以通過相同端口選擇性地處理多種電纜類型的系統和方法
US13/797,850 US8648501B2 (en) 2009-03-09 2013-03-12 Systems and methods for providing protection circuitry to selectively handle multiple cable-types through the same port

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US15856509P 2009-03-09 2009-03-09
US12/477,547 US20100225176A1 (en) 2009-03-09 2009-06-03 Systems and methods for providing protection circuitry to selectively handle multiple cable-types through the same port

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US13/797,850 Active US8648501B2 (en) 2009-03-09 2013-03-12 Systems and methods for providing protection circuitry to selectively handle multiple cable-types through the same port

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CN (1) CN102341971B (zh)
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CN102341971B (zh) 2014-06-25
CN102341971A (zh) 2012-02-01
DE112009004659T8 (de) 2012-12-20
DE112009004659T9 (de) 2013-11-21
HK1166886A1 (zh) 2012-11-09
GB2480043A (en) 2011-11-02
GB201115001D0 (en) 2011-10-12
WO2010104541A1 (en) 2010-09-16
US20130200726A1 (en) 2013-08-08
DE112009004659B4 (de) 2022-05-19
GB2480043B (en) 2013-07-17
US8648501B2 (en) 2014-02-11
DE112009004659T5 (de) 2012-08-02

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