Method and apparatus facilitating multi mode interfaces
AssigneeFreescale Semiconductor, Inc.
InventorAlan Ruff
Life of this patent
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Abstract
A system comprises a pulse generator 615 configured to provide a control pulse a transmission gate 603 configured to interrupt a path between a communication device 307 and an auxiliary device 303 during the control pulse; and a pulse transmitter 607 responsive to the control pulse and configured to inject an interrupt pulse in the path while the path is interrupted. A corresponding method of providing an interrupt signal in an audio path between a source and a sink includes interrupting an audio path between the source and the sink, injecting an interrupt pulse in the audio path while the audio path is interrupted, and then reconnecting the audio path.
Claims22
A method of providing an interrupt signal in an audio path between a source and a sink, the method comprising:
- interrupting the audio path between the source and the sink;
- injecting an interrupt pulse in the audio path while the audio path is interrupted;
- and
- reconnecting the audio path.
The method of claim .1 wherein the injecting the interrupt pulse uses a universal asynchronous receiver transmitter (UART).
A system comprising:
- a pulse generator configured to provide a control signal;
- a switch configured to interrupt a path between a communication device and an auxiliary device during the control signal;
- and
- a pulse transmitter responsive to the control signal and configured to inject an interrupt pulse in the path while the path is interrupted.
An integrated circuit comprising:
- a pulse generator configured to provide a control pulse;
- a transmission gate configured to interrupt an audio path in a cellular phone to CarKit interface during the control pulse;
- and
- a universal asynchronous receiver and transceiver (UART) responsive to the control pulse and configured to inject an interrupt pulse in the audio path while the audio path is interrupted.
Dependencies are inferred from the claim text.