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Intel® PCI Bridges

Intel offers both transparent and non-transparent PCI bridges, as well as a PCI-X transparent bridge with opaque memory mode for semi-transparent operation. Both product lines allow designers to add more PCI/PCI-X devices or more PCI/PCI-X option card slots than a single PCI bus can support. However, non-transparent bridges differ from standard, transparent PCI-to-PCI bridges by allowing independent mapping of primary and secondary bus address spaces, a key benefit when local devices require private memory maps.

Transparent


Product

 PCI Bus Write Buffer / Read Buffer Package
 Max Clock PCI Revision Resource Link
21152 32-bit 88 Bytes / 72 Bytes 160 PQFP 33 MHz PCI 2.3  
21154 64-bit 88 Bytes / 72 Bytes 304 PBGA 33 MHz / 66 MHz PCI 2.3

31154 64-bit 8K Bytes / 8K Bytes 421 PBGA 133 MHz PCI-X 1.0b / PCI 2.3
41110 64-bit 1K Bytes / 1K Bytes 521 FC3BGA 133 MHz PCI Express* 1.0a / PCI-X v1.0b

 
41210 64-bit 1K Bytes / 1K Bytes 521 FC3BGA 133 MHz PCI Express* 1.0a / PCI-X v1.0b

Non-transparent

Product
 PCI Bus Write Buffer / Read Buffer Package
 Max Clock PCI Revision Resource Link
21555 64-bit 256 Bytes / 256 Bytes 304 PBGA 33 MHz / 66 MHz PCI 2.3

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