Methods and apparatus for safe negotiation of high current for active cable assemblies
First Claim
1. A method for detecting a Power for Cable Assembly (PCA)-capable source, the PCA-capable source being coupled to a sink device through a cable assembly, the method comprising:
- detecting, by the cable assembly, an assertion of a defined voltage on a power supply pin;
forwarding an assertion of a hot plug detect signal pin, by the cable assembly, from the sink device towards the PCA-capable source;
detecting, by the cable assembly, a reduction in the defined voltage on the power supply pin for a defined period of time in response to the forwarding; and
detecting, by the cable assembly, a re-assertion of the defined voltage on the power supply pin subsequent to the lapse of the defined period of time.
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Accused Products
Abstract
Methods and apparatus for the safe negotiation of high current for a High-Definition Multimedia Interface (HDMI) active cable assembly. In one embodiment, a method for detecting a Power for Cable Assembly (PCA)-capable source is disclosed, the method including: detecting, by a cable assembly, an assertion of a defined voltage on a power supply pin; forwarding an assertion of a hot plug detect signal pin, by the cable assembly, from a sink device towards the PCA-capable source; detecting, by the cable assembly, a reduction in the defined voltage on the power supply pin for a defined period of time in response to the forwarding; and detecting, by the cable assembly, a re-assertion of the defined voltage on the power supply pin subsequent to the lapse of the defined period of time. PCA dependent cable assemblies and PCA capable source devices are also disclosed.
6 Citations
20 Claims
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1. A method for detecting a Power for Cable Assembly (PCA)-capable source, the PCA-capable source being coupled to a sink device through a cable assembly, the method comprising:
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detecting, by the cable assembly, an assertion of a defined voltage on a power supply pin; forwarding an assertion of a hot plug detect signal pin, by the cable assembly, from the sink device towards the PCA-capable source; detecting, by the cable assembly, a reduction in the defined voltage on the power supply pin for a defined period of time in response to the forwarding; and detecting, by the cable assembly, a re-assertion of the defined voltage on the power supply pin subsequent to the lapse of the defined period of time. - View Dependent Claims (2, 3, 4, 5)
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6. A Power for Cable Assembly (PCA) dependent cable assembly, comprising:
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a first network interface that is configured to be coupled with a source device; a second network interface that is configured to be coupled with a sink device; and internal logic that is configured to enable the PCA dependent cable assembly to; detect an assertion of a defined voltage on a power supply pin associated with the first network interface; forward an assertion of a hot plug detect signal pin received by the second network interface over the first network interface towards the source device; detect a reduction in the defined voltage on the power supply pin associated with the first network interface for a defined period of time in response to the forward of the assertion of the hot plug detect signal; and detect a re-assertion of the defined voltage on the power supply pin associated with the first network interface, subsequent to the lapse of the defined period of time. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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14. A Power for Cable Assembly (PCA) capable source device, comprising:
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a network interface, the network interface comprising a plurality of data transmission lanes, a hot plug detect signaling pin, and a power supply pin; a processor apparatus; and a non-transitory computer readable apparatus, the non-transitory computer readable apparatus comprising a storage medium, the storage medium having a plurality of computer-executable instructions, the plurality of computer-executable instructions, when executed by the processor apparatus, are configured to; assert a defined voltage on the power supply pin; receive an assertion of a hot plug detect signal via the hot plug detect signaling pin; assert a reduced voltage on the power supply pin, the reduced voltage being less than the defined voltage, the reduced voltage being asserted for a defined period of time in response to the received hot plug detect signal; and re-assert the defined voltage on the power supply pin subsequent to the lapse of the defined period of time. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification