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US 5,636,347 AGranted
Computer card insertion detection circuit
AssigneeIntel Corporation
InventorsMichael J. Muchnick, Jerry A. Verseput, Jasmin Ajanovic
Life of this patent
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AssigneeIntel Corporation
InventorsMichael J. Muchnick, Jerry A. Verseput, Jasmin Ajanovic
Estimating the term…
A personal computer (PC) card insertion method and apparatus uses a subset of connector ground terminals and pins, located at either end of the connector, for detecting the onset of a card insertion. The host PC card slot connector has pull-up resistors for keeping the subset of ground terminals at a high logic level (V.sub.CC). Also, the subset of pins are made longer than the signal pins so that when an insertion of a PC card begins, the grounding of one or more of the subset of pins indicates that a PC card insertion has begun, allowing the host system to take the necessary precautions to ensure an orderly acceptance of the card without any undesirable system affects that might otherwise result. Also, a logic network for using the subset of connector terminals as additional grounding connections is provided upon completion of the insertion.
A card insertion detection apparatus for providing a warning signal to a host system that a circuit card is in the process of being inserted into a card slot of the host system in order to allow the host system to accept the circuit card in an orderly manner that does not adversely affect the host system by protecting the host system from transients that could result from the connection of the circuit card, the circuit card having a connector with a multiplicity of terminals distributed along the connector's width, and arranged in at least one row, for connecting to corresponding terminals of a mating connector in a host system card slot, the circuit card connector having a group of preassigned ground terminals located near both edges of the connector width, a subset of the group of ground terminals located near both edges being card insertion detection terminals to be used for card insertion detection, the apparatus comprising:
A method for detecting an onset of a card insertion into a card slot connector of a host system in order to allow the host system to accept a circuit card in an orderly manner that does not adversely affect the host system by protecting the host system from transients that could result from the card insertion, the circuit card having a connector with a multiplicity of terminals distributed along the connector's width and arranged in at least one row for connecting to corresponding terminals of a mating connector in a card slot of the host system, the circuit card connector having a group of preassigned terminals located near both edges of the connector width that includes a set of ground terminals, a subset of the ground terminals to be used for card insertion detection, the method comprising:
A system for detecting an insertion of a circuit card into a host system and for providing the host system with a warning signal that the circuit card is in the process of being inserted into the host system to allow the host system to accept the circuit card in an orderly manner that does not adversely affect the host system by protecting the host system from transients that could result from connection of the circuit card,
A means for providing a warning signal to a host system upon detection of a circuit card being inserted into a card slot of the host system in order to allow the host system to accept the circuit card in an orderly manner that does not adversely affect the host system by protecting the host system from transients that could result from the connection of the circuit card, the circuit card having a connector with a multiplicity of terminals distributed along the connector's width, and arranged in at least one row, for connecting to corresponding terminals of a mating connector in a host system card slot, the circuit card connector having a group of preassigned ground terminals located near both edges of the connector width, a subset of the group of ground terminals located near both edges being card insertion detection terminals to be used for card insertion detection, the means for detection comprising:
A card insertion detection apparatus for providing a warning signal to a host system that a circuit card is in the process of being inserted into a card slot of the host system in order to allow the host system to accept the circuit card in an orderly manner that does not adversely affect the host system by protecting the host system from transients that could result from the connection of the circuit card, the circuit card having a connector with a multiplicity of terminals distributed along the connector's width, and arranged in at least one row, for connecting to corresponding terminals of a mating connector in a host system card slot, the circuit card connector having a group of preassigned ground terminals located near both edges of the connector width and a group of preassigned insertion detection terminals located near both edges to be used for card insertion detection, the apparatus comprising:
Dependencies are inferred from the claim text.