Abstract: An electronic device having a communications module with a first set of data rates can be enabled to use the communications module to process signals received from a source that uses a second set of data rates. The device may generate packets, frames, etc. at the first set of data rates using the communications module from the signals received from the remote source by sampling signals at one or more of the first set of data rates. The device may then reconstruct data or payloads originally transmitted in the signals at the second set of data rates from the packets generated at the first set of data rates. Thus, the device can process signals or transmissions at the second set of data rates using the first set of data rates without requiring additional receivers or communications modules to process the signals.

Abstract: Methods, apparatus, and circuits for managing power among portable computing devices and one or more accessories. One example provides commands to improve power management between a portable computing device and one or more accessories. Other examples provide commands that may allow a portable computing device to charge at a maximum available current level while providing an accessory with sufficient current for its proper operation. Another may help prevent a portable computing device from drawing a high level of current that could be detrimental to an accessory, while others provide commands that may allow a battery pack to instruct a portable computing device to not charge its internal battery. Another example may allow a portable computing device to determine which power supply among multiple power supplies should be used to power an accessory, while others may allow an accessory to retrieve charging current parameters from a portable computing device.

Abstract: A method for a portable media player to control power provided an accessory is disclosed. The method includes requesting information about the power capabilities of the accessory by the portable media player. The method further includes providing information about the power capabilities of the accessory by the accessory to the portable media player, and utilizing the information to set the power of the accessory. A method and system in accordance with the present invention provides a system that allows a portable media player to obtain information from an accessory concerning its power requirements. A portable media player can then utilize the power requirements information to allow for the powering of the accessory when connected to the portable media player.

Abstract: Circuits, methods, and apparatus that allow sports or other equipment, such as gym or other cardio equipment, to write data to a media player. Examples further provide the uploading of this data to a computer and third-party website. To monitor progress, the third-party website can be used to track workout data over time. The third party-website can also collect data from other users, which is particularly useful for providing a competitive environment. This data can then be graphically displayed in various ways to provide encouragement.

Abstract: An interface and protocol allow a media player to communicate with external accessories over a transport link. The protocol includes a core protocol functionality and a number of accessory lingoes. Examples of accessory lingoes include a microphone lingo, a simple remote lingo, a display remote lingo, an RF transmitter lingo, and an extended interface lingo.

Abstract: A smart cable apparatus includes resources that provide for additional functionality such as cable authentication and cable identification. The cable apparatus can be configured for coupling an electronic device such as a media player to other electronic devices such as media player accessories. The cable apparatus includes one or more processing components that can be integrated as part of the cable apparatus. The one or more processing components can be configured to identify the type of signal the cable apparatus is intended to carry, and to communicate that information to the electronic device to which it is connected. The one or more processing components can also be configured to process authentication inquires to indicate whether the cable apparatus is an authorized accessory for the electronic device.

Abstract: Methods and systems for improved interaction between media devices and accessory devices are disclosed. In one embodiment, the improved interaction can operate to configure a user interface of a media device dependent on the type or condition of an accessory device. In the same or another embodiment, the improved interaction can exchange status information between a media device and an accessory device that can influence operation of either or both of the devices.

Abstract: A host device and an accessory exchange information (e.g., commands and data) via an intermediate device. The host device and accessory can each connect to the intermediate device. The host device can exchange commands and data with the intermediate device, while the accessory device can serially exchange data with the intermediate device. The host device and the accessory can also “tunnel” information to each other through the intermediate device, by packaging the tunneled information as a payload of a command recognizable by the intermediate device; the intermediate device can repackage and forward the payload. In some embodiments, the intermediate device can control serial communication parameters between the intermediate device and the accessory in response to commands received from the host.

Abstract: An interface and protocol allow a media player to communicate with external accessories over a transport link. The protocol includes a core protocol functionality and a number of accessory lingoes. Examples of accessory lingoes include a microphone lingo, a simple remote lingo, a display remote lingo, an RF transmitter lingo, and an extended interface lingo.

Abstract: A mobile computing device (MCD) can determine, based on model-specific test result information, whether an accessory may be incompatible with specific MCD functions. In some embodiments, the accessory provides test result information separately indicating a test result for each of a number of MCD models. Multiple MCD models can be grouped into a device class, and the MCD can deem the accessory compatible if he received test result information indicates a pass result for at least one of the device models associated with a device class to which the MCD belongs. If the accessory is not deemed to be compatible with the mobile computing device, the MCD can generate a warning.

Abstract: Improved techniques for communicating between a portable electronic device and an accessory (or auxiliary) device are disclosed. The accessory device can augment or supplement the functionality or capabilities of the portable electronic device. For example, in one embodiment, the accessory device can provide wireless communication capabilities to the portable electronic device. In one embodiment, the portable electronic device pertains to a portable media player and thus provide media data for storage, playback or transmission. In one embodiment, the accessory device is attachable to the portable electronic device.

Abstract: Methods, apparatus, and circuits for managing power among portable computing devices and one or more accessories. One example provides commands to improve power management between a portable computing device and one or more accessories. Other examples provide commands that may allow a portable computing device to charge at a maximum available current level while providing an accessory with sufficient current for its proper operation. Another may help prevent a portable computing device from drawing a high level of current that could be detrimental to an accessory, while others provide commands that may allow a battery pack to instruct a portable computing device to not charge its internal battery. Another example may allow a portable computing device to determine which power supply among multiple power supplies should be used to power an accessory, while others may allow an accessory to retrieve charging current parameters from a portable computing device.

Abstract: Circuits, methods, and apparatus that allow sports or other equipment, such as gym or other cardio equipment, to write data to a media player. Examples further provide the uploading of this data to a computer and third-party website. To monitor progress, the third-party website can be used to track workout data over time. The third party-website can also collect data from other users, which is particularly useful for providing a competitive environment. This data can then be graphically displayed in various ways to provide encouragement.

Abstract: Techniques for transferring stored data between a media player and an accessory. In one set of embodiments, one of the media player and the accessory can obtain a unique identifier for a particular file stored in the other of the media player and the accessory. The one of the media player and the accessory can then retrieve data from the stored file using the unique identifier. In certain embodiments, accessories and media players can retrieve and store data utilizing an arbitrary format. This data can be opaque to any protocol used by the media player or accessory and can require no parsing or interpretation. To provide this facility, a plurality of commands can allow both media players and accessories to present a simple file system. The plurality of commands can be utilized in a variety of environments.

Abstract: A method for communicating data using a “burst protocol” includes enabling power to transmitters and receivers when needed to balance power consumption with latency and unscheduled communication. A transmitter transmits a plurality of packets indicative of substantially the same payload. Power then may be disabled to the transmitter. A first predetermined time is determined to enable a receiver. A second predetermined time is determined to disable the receiver. Power then may be enabled to the receiver based on the first predetermined time. The payload is output in response to receiving one or more of the plurality of packets. Power to the receiver is disabled based on the second predetermined time.

Abstract: A portable computing device (PCD) can control the operating state of a component within an accessory. For example, an accessory can have some components (e.g., a video processor) that are used for some operations but not for others. A PCD can determine whether a particular component will be used and can instruct the accessory to set the component to a desired state, e.g., powered up when in use and powered down when not in use. In some embodiments, the PCD can use status information provided by the accessory in determining a desired state for the accessory component. For example, in the case of a video converter accessory, if no display device or other video receiver is connected to the accessory, a video processor within the accessory can be powered down.

Abstract: Methods, apparatus, and circuits for managing power among portable computing devices and one or more accessories. One example provides commands to improve power management between a portable computing device and one or more accessories. Other examples provide commands that may allow a portable computing device to charge at a maximum available current level while providing an accessory with sufficient current for its proper operation. Another may help prevent a portable computing device from drawing a high level of current that could be detrimental to an accessory, while others provide commands that may allow a battery pack to instruct a portable computing device to not charge its internal battery. Another example may allow a portable computing device to determine which power supply among multiple power supplies should be used to power an accessory, while others may allow an accessory to retrieve charging current parameters from a portable computing device.

Abstract: A portable computing device (PCD) can be connected to multiple accessories concurrently in a daisy chain topology. with the PCD at a “front” end of the chain. At least one intermediary accessory (or relay) provides one port for connection to the PCD and another port for connection to another accessory, which can also be a relay. Each connected accessory can interact with the PCD to invoke functionality, receive or deliver content, etc. Concurrently, each relay accessory can also act as a relay for other accessories in the chain, directing signals from a downstream accessory toward the PCD and directing signals received from upstream toward a downstream accessory, thereby allowing downstream accessories to interact with the PCD. The presence of upstream intermediaries can be transparent to a downstream accessory.

Abstract: A method for communicating data using a “burst protocol” includes enabling power to transmitters and receivers when needed to balance power consumption with latency and unscheduled communication. A transmitter transmits a plurality of packets indicative of substantially the same payload. Power then may be disabled to the transmitter. A first predetermined time is determined to enable a receiver. A second predetermined time is determined to disable the receiver. Power then may be enabled to the receiver based on the first predetermined time. The payload is output in response to receiving one or more of the plurality of packets. Power to the receiver is disabled based on the second predetermined time.

Abstract: A consumer electronic product (e.g., a portable media player ported to a media delivery accessory) is powered by a limited capacity DC power source (such as a battery or mini-fuel cell). The consumer electronic product limits the maximum allowable sound pressure level (SPL) that can be produced by the speakers. In one embodiment, the maximum allowable SPL is based upon an amount of stored energy available in the limited capacity DC power source.