PCIXCAP pin input sharing configuration for additional use as PCI hot plug interface pin input
US7234015B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 2005 |
| Grant date | Jun 19, 2007 |
| Priority date | — |
| Expiry date | Sep 27, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/4072
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.