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.

Abstract: Automated software loading into a battery-less mobile phone is accomplished through attachment of a special non-standard USB On-The-Go cable to a serial connector of the mobile phone, thereby delivering power supply and unique signals for placing the phone in a special mode of operation used for production or distribution. In operation, when a unique non-standard voltage is asserted on the identification (ID) pin of the USB connector interface, it is detected by special circuitry in the serial connector. The circuitry then enables power supply to the battery-less phone and generates a turn-on signal directing the mobile phone to automatically power-on and enter into a particular state of operation, for example a test or software loading mode. Because this process is automatic, the efficiency of software loading or testing during production or distribution of the mobile device is improved.

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.

Abstract: A transceiver module can share a common connector with a rechargeable battery connection. The transceiver module can be protected from the high voltages applied by a battery charger. Determining when the voltage applied at a connector exceeds a reference voltage and electrically decoupling the transceiver module from the connector when the reference voltage is exceeded can protect the transceiver module. The reference voltage can be set at a level so that the transceiver is decoupled from the connector when the voltage at the connector reaches a voltage that is unsafe for the transceiver.

Abstract: Automated software loading into a battery-less mobile phone is accomplished through attachment of a special non-standard USB On-The-Go cable to a serial connector of the mobile phone, thereby delivering power supply and unique signals for placing the phone in a special mode of operation used for production or distribution. In operation, when a unique non-standard voltage is asserted on the identification (ID) pin of the USB connector interface, it is detected by special circuitry in the serial connector. The circuitry then enables power supply to the battery-less phone and generates a turn-on signal directing the mobile phone to automatically power-on and enter into a particular state of operation, for example a test or software loading mode. Because this process is automatic, the efficiency of software loading or testing during production or distribution of the mobile device is improved.