Peripheral component protection in information handling systems
First Claim
1. A method, comprising:
- preventing, by a baseboard of an information handling system configured to be connected to a plurality of peripheral components in parallel, powering on of the information handling system until a determination is made, by the baseboard, that a bias voltage exists on at least one wire of a data connector connecting the information handling system to a peripheral component;
determining, by the baseboard of the information handling system that a bias voltage exists on the at least one wire of the data connector connecting the information handling system to the peripheral component;
enabling, by the information handling system, the peripheral component by activating the data connector when the bias voltage exists on at least one wire of the data connector and allowing the information handling system to power on.
8 Assignments
0 Petitions
Accused Products
Abstract
Logic on the baseboard can be used to provide backfeed protection by determining the condition of the peripheral component before enabling communication over a data cable to the peripheral component. By determining the condition of the peripheral component prior to beginning communications, the baseboard can reduce the likelihood that the baseboard asserts a wire on the data cable before the peripheral component receives power. With such information available to the baseboard, the baseboard avoids supplying a data signal over a wire of the data cable that would cause the destination circuitry of the peripheral component from exceeding its safety specification. When a bias voltage exists on the wire of the data connector corresponding to the peripheral component, the peripheral component is considered powered-on and data can be communicated to the peripheral component. Communications with that peripheral component may be enabled by turning on a clock source to provide a clock signal through the data connector to the peripheral component. The clock signal is then used by the peripheral components to decode data transmitted on the data cable.
8 Citations
20 Claims
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1. A method, comprising:
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preventing, by a baseboard of an information handling system configured to be connected to a plurality of peripheral components in parallel, powering on of the information handling system until a determination is made, by the baseboard, that a bias voltage exists on at least one wire of a data connector connecting the information handling system to a peripheral component; determining, by the baseboard of the information handling system that a bias voltage exists on the at least one wire of the data connector connecting the information handling system to the peripheral component; enabling, by the information handling system, the peripheral component by activating the data connector when the bias voltage exists on at least one wire of the data connector and allowing the information handling system to power on. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus, comprising:
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a controller of a baseboard of an information handling system configured to be connected to a plurality of peripheral components in parallel and to perform steps comprising; preventing powering on of the information handling system until a determination is made, by the controller of the baseboard, that a bias voltage exists on at least one wire of a data connector connecting the information handling system to a peripheral component determining that a bias voltage exists on the at least one wire of the data connector connecting the information handling system to the peripheral component; enabling the peripheral component by activating the data connector when the bias voltage exists on at least one wire of the data connector and allowing the information handling system to power on. - View Dependent Claims (8, 9, 10, 11, 12)
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13. An information handling system, comprising:
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a complex programmable logic device (CPLD), of a baseboard of an information handling system configured to be coupled to a plurality of peripheral components in parallel, configured to perform steps comprising; preventing powering on of the information handling system until a determination is made, by the CPLD of the baseboard, that a bias voltage exists on at least one wire of a data connector connecting the information handling system to a peripheral component; determining that a bias voltage exists on the at least one wire of the data connector connecting the information handling system to the peripheral component; and enabling the peripheral component by activating the data connector when the bias voltage exists on at least one wire of the data connector and allowing the information handling system to power on. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification