PCIXCAP pin input sharing configuration for additional use...

Details PCIXCAP pin input sharing configuration for additional use... PCIXCAP pin input sharing configuration for additional use...

2007-06-19

2007-06-19

Lee, Christopher E. (Department: 2111)

Electrical computers and digital data processing systems: input/

Intrasystem connection

Bus expansion or extension

C710S104000, C710S316000, C713S310000

Reexamination Certificate

active

11151316

ABSTRACT:
A method is provided for selectively using a PCIXCAP pin input to detect PCI/PCI-X bus mode or as DC pin input. The method provides a PCI/PCI-X device having PCIXCAP pin input, and a circuit having a plurality of voltage level detection structures and an output corresponding to each voltage level detection structure. Each output is received by a first logic to detect the PCI bus mode of a device defining a first, PCIXCAP mode for the pin input. The method ensures that one of the plurality of voltage level detection structures may be used as a DC signal logic to provide a DC output signal to a second logic. A mode of the PCIXCAP pin input is selected so as to provide the DC output signal under conditions where the PCI/PCI-X bus mode is not being detected. In an embodiment, the DC output signal is used in as a PCI Hot-Plug interface signal.

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“AMD-3181™ HyperTransport™ PCI-X® Tunnel Data Sheet”, 24637 Rev. 3.02, Aug. 10, 2004, pp. 1-87.

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