Cell phone accessory identification algorithm by generating and measuring a voltage pulse through a pin interface
First Claim
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1. Method for identifying a communication interface of an electronic unit attached to a connector of an electronic device, comprising the steps of:
- generating a voltage pulse in said device on a pin of said connector;
measuring the voltage response to the voltage pulse generated on said pin, as affected by a load in said unit;
comparing the measured voltage response with predetermined voltage criteria; and
performing communication interface identification of said unit dependent on said comparison.
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Abstract
In some embodiments, a method is provided for identifying a communication interface of an electronic unit attached to a connector of an electronic device. A voltage pulse is generated in the device on a pin of the connector. The voltage on the pin is measured, as it is affected by a load in the unit. The measured voltage is compared with predetermined voltage criteria. Communication interface identification is performed on the unit dependent on the comparison.
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Citations
36 Claims
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1. Method for identifying a communication interface of an electronic unit attached to a connector of an electronic device, comprising the steps of:
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generating a voltage pulse in said device on a pin of said connector; measuring the voltage response to the voltage pulse generated on said pin, as affected by a load in said unit; comparing the measured voltage response with predetermined voltage criteria; and performing communication interface identification of said unit dependent on said comparison. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. An identification system comprising:
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an electronic unit having a communication interface comprising a first connector; an electronic device comprising a system connector, wherein the first connector is configured to be attachable to the system connector, wherein the electronic device comprises a voltage pulse generator connected to an identification pin of the system connector; a first pin of the first connector, is configured to be coupled to the identification pin upon attachment of the first connector to the system connector, and is coupled to an electronic circuit in the electronic unit; the electronic circuit has an electric load which is selected to represent an identity for said communication interface; and the electronic device comprises identification means for measuring a voltage response from the communication interface, comparing the measured voltage with predetermined voltage criteria, and performing communication interface identification of said unit dependent on said comparison, wherein the electric load is connected between said first pin and ground, and the identification means are connected to measure the voltage response on the identification pin. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification