System for connecting either of two supply voltage type PCI cards using a common connector socket
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United States of America Patent
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Jun 8, 1999
Grant Date -
N/A
app pub date -
Jul 1, 1997
filing date -
Jul 1, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A multiple supply voltage peripheral component interconnect (PCI) connector is disclosed which replaces connectors that are keyed for a specific signaling voltage. A single connector receives all current types of PCI keyed card edge connectors and supplies the correct signaling voltage thereto. The type of PCI card is identified and the appropriate signaling voltage is switched to the signaling power input (Vio) using industry standard conditions at selected pin locations rather than using unique keying of cards and connectors to assure a match between the signaling voltage required by the card and the signaling voltage supplied at the connector. As shown, detection and control circuitry senses the presence of grounded or open conditions at selected pin locations indicative of the type card present in the connector and switches the signaling power supply to the correct voltage source. Also, the connector is buffered to enable connection to a single logical PCI bus irrespective of the signaling voltage supplied to the card. Further, the buffered connectors can be replicated to enable numerous cards, with any mix of signaling voltages, to be attached to the single logical bus.
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