Presence indication signal associated with an attachment
First Claim
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1. An apparatus, comprising:
- a conductive path to be coupled to an attachment and having a purpose other than presence detection; and
a presence detect circuit coupled to the conductive path, wherein the presence detect circuit is to generate a presence indication signal even when the attachment is not operating.
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Abstract
According to some embodiments, a presence indication associated with an attachment is provided.
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Citations
21 Claims
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1. An apparatus, comprising:
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a conductive path to be coupled to an attachment and having a purpose other than presence detection; and
a presence detect circuit coupled to the conductive path, wherein the presence detect circuit is to generate a presence indication signal even when the attachment is not operating. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An apparatus, comprising:
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a first conductive path having a limiting resistance and adapted to be coupled to a storage device in order to deliver power and to perform a pre-charge function for the storage device;
a second conductive path to be coupled to the storage device, wherein the second conductive path is associated with a resistance of substantially zero; and
a presence detect circuit coupled to the conductive path, wherein the presence detect circuit comprises;
a first node between the limiting resistance and a portion of the conductive path to be coupled to the storage device, a second node between the limiting resistance and a power supply, a comparator, comprising;
an output line to provide a presence indication signal to a host controller, the presence indication signal indicating whether or not the first and second conductive paths are coupled to the storage device, a first input line coupled to the first node, and a second input line coupled to a third node, a first node voltage pull-up resistor coupled to the first node, a second node voltage pull-down resistor coupled to the second node, a third node voltage pull-up resistor coupled to the third node, and a third node voltage pull-down resistor coupled to the third node, wherein the presence detect circuit is adapted to generate the presence indication signal even when the power supply is off - View Dependent Claims (15)
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16. A method, comprising:
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detecting that an attachment is present via a conductive path adapted to be coupled to an attachment and having a purpose other than presence detection; and
generating a presence indication signal even when the attachment is not operating. - View Dependent Claims (17, 18, 19, 20, 21)
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Specification