Detecting a connection to an unpowered host
First Claim
Patent Images
1. An apparatus, comprising:
- a cable comprising a data line and a cable screen, wherein the cable screen is a conductor configured to shield the data line from interference; and
a sensor coupled with the cable, wherein the sensor is configured to determine whether the cable is connected to a host device by detecting an impedance between the cable screen and a ground of the host device.
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Abstract
A method and apparatus for detecting a connection between a peripheral device and a host device is described.
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Citations
17 Claims
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1. An apparatus, comprising:
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a cable comprising a data line and a cable screen, wherein the cable screen is a conductor configured to shield the data line from interference; and a sensor coupled with the cable, wherein the sensor is configured to determine whether the cable is connected to a host device by detecting an impedance between the cable screen and a ground of the host device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method, comprising:
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applying a voltage to a conductor of a cable, wherein the cable is configured to connect a peripheral device to a host device, the conductor comprising a cable screen configured to shield a data line in the cable from interference; detecting whether a connection is present between the peripheral device and the host device by detecting an impedance between the conductor and a ground of the host device; and disabling a function of the peripheral device in response to detecting a connection with the host device. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification