Apparatus and method of PCI routing in a bridge configuration
US6233641A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 1998 |
| Grant date | May 15, 2001 |
| Priority date | — |
| Expiry date | Jun 8, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/4045
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A primary PCI bus and multiple secondary PCI busses of a PCI expansion card interface, are interconnected by a routing circuit. The routing circuit functions as a switched bridge between the primary PCI bus and each of the secondary PCI busses, respectively, by associating each secondary PCI bus with an address range, and forwarding a command received from the primary PCI bus to a secondary PCI bus mapped to an address range including the address of the command. Furthermore, the routing circuit forwards commands intended for the primary PCI bus from the secondary PCI busses. In addition, the routing circuit directly routes commands between the secondary PCI busses, when commands received from one secondary PCI bus are intended for another PCI bus, without use of the primary bus. As a result, traffic and latency on the primary PCI bus is reduced and efficiency is increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.