Host interface, accessory interface and method for managing a connection between a host interface and an accessory device
First Claim
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1. A host interface for a media device, the host interface comprising:
- a first host audio terminal for receiving a first analog audio signal;
a second host audio terminal for receiving a second analog audio signal;
a first connector audio terminal for connecting a first pole of a four-pole connector;
a second connector audio terminal for connecting a second pole of the four-pole connector;
a connector microphone terminal for connecting a third pole of the four-pole connector, the host interface being configured to send clock information and power over the connector microphone terminal and the connected third pole of the four-pole connector;
a data transmitter that is configured to send an encoded digital audio signal to the connector microphone terminal over the connected third pole of the four-pole connector; and
a host control circuit that is adaptedto detect whether a device is connected that requires a supply signal over the four-pole connector and further requires a further supply signal over the four-pole connector,if no connection of the device requiring the supply signal and/or the further supply signal is detected, to pass the received first analog audio signal to the first pole of the four-pole connector by connecting the first connector audio terminal to the first host audio terminal and to pass the received second analog audio signal to the second pole of the four-pole connector by connecting the second connector audio terminal to the second host audio terminal, andif the connection of the device requiring the supply signal and the further supply signal is detected, to connect the first pole of the four-pole connector to a supply terminal by connecting the first connector audio terminal to the supply terminal and to connect the second pole of the four-pole connector to a further supply terminal by connecting the second connector audio terminal to the further supply terminal.
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Abstract
A host interface for a media device comprises a first and a second host audio terminal for receiving a first and a second analog audio signal, a first and a second connector audio terminal for connecting a first and a second pole of a four-pole connector, and a host control circuit. The host control circuit is adapted to detect whether a device requiring a supply signal over the four-pole connector is connected. If no such device is detected, the first and the second analog audio signal are passed to the first and the second connector audio terminal. If such a device is detected, the first connector audio terminal is connected to a supply terminal.
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Citations
17 Claims
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1. A host interface for a media device, the host interface comprising:
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a first host audio terminal for receiving a first analog audio signal; a second host audio terminal for receiving a second analog audio signal; a first connector audio terminal for connecting a first pole of a four-pole connector; a second connector audio terminal for connecting a second pole of the four-pole connector; a connector microphone terminal for connecting a third pole of the four-pole connector, the host interface being configured to send clock information and power over the connector microphone terminal and the connected third pole of the four-pole connector; a data transmitter that is configured to send an encoded digital audio signal to the connector microphone terminal over the connected third pole of the four-pole connector; and a host control circuit that is adapted to detect whether a device is connected that requires a supply signal over the four-pole connector and further requires a further supply signal over the four-pole connector, if no connection of the device requiring the supply signal and/or the further supply signal is detected, to pass the received first analog audio signal to the first pole of the four-pole connector by connecting the first connector audio terminal to the first host audio terminal and to pass the received second analog audio signal to the second pole of the four-pole connector by connecting the second connector audio terminal to the second host audio terminal, and if the connection of the device requiring the supply signal and the further supply signal is detected, to connect the first pole of the four-pole connector to a supply terminal by connecting the first connector audio terminal to the supply terminal and to connect the second pole of the four-pole connector to a further supply terminal by connecting the second connector audio terminal to the further supply terminal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for managing a connection between a host interface for a media device and an accessory device, the method comprising:
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physically connecting the host interface and the accessory device using a four-pole connector; in the host interface, detecting whether an accessory device is connected that requires a supply signal over the four-pole connector and further requires a further supply signal over the four-pole connector; if no connection of the accessory device requiring the supply signal and/or the further supply signal is detected, the host interface passing a first analog audio signal to a first pole of the four-pole connector and passing a second analog audio signal to a second pole of the four-pole connector; if the connection of the accessory device requiring the supply signal and the further supply signal is detected, the host interface connecting the first pole to a supply terminal and connecting the second pole to a further supply terminal; sending clock information and power over a third pole of the four-pole connector to the accessory device; and sending an encoded digital audio signal over the third pole of the four-pole connector to the accessory device. - View Dependent Claims (14, 15, 16, 17)
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Specification