Intel 31154 manual Introduction2, Product Overview, PCI-to-PCI Bridge Configurations

Models: 31154

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Introduction

Introduction

Introduction2

2.1Product Overview

The Intel® 31154 133 MHz PCI Bridge (called hereafter the “31154”) is a PCI component that functions as a highly concurrent, low-latency transparent bridge between two PCI buses. The 31154 can operate as a PCI-to-PCI bridge in the configurations shown in Table 2.

Table 2.

PCI-to-PCI Bridge Configurations

 

 

 

 

 

 

Primary Bus Interface

 

Secondary Bus Interface

 

 

 

 

 

PCI 2.3

 

PCI 2.3

 

 

 

 

 

PCI 2.3

 

PCI-X

 

 

 

 

 

PCI-X

 

PCI 2.3

 

 

 

 

 

PCI-X

 

PCI-X

 

 

 

 

The 31154 is used on motherboards to provide additional I/O expansion slots. It is also used on PCI

 

add-in cards to mitigate the restrictive electrical loading constraints imposed on an expansion slot,

 

enabling multiple conventional PCI or multiple PCI-X devices to reside on a single PCI I/O

 

adapter. The 31154 block diagram in Figure 1 indicates potential 31154 applications for a range of

 

PCI bus speeds.

 

Figure 1.

Intel® 31154 133 MHz PCI Bridge Applications

 

Legacy￿￿￿￿￿￿

33 MHz

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Bus

 

￿￿￿￿￿

PCI-X

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LegacyMulti￿￿￿￿￿￿PCI-X

66￿￿￿￿￿￿MHzDevices

SlotsMHz66BusX-PCI

￿￿￿￿￿

SlotsMHz100BusX-PCI

￿￿￿￿￿

 

￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿

High￿￿￿￿￿￿-End

Application

Slot

￿￿￿￿￿

PCI-X Bus 133 MHz

 

CPU Host

￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿

￿￿￿￿

￿￿￿￿￿￿￿￿

Intel® 31154 133 MHz PCI Bridge Design Guide Design Guide

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Intel Introduction2, Product Overview, PCI-to-PCI Bridge Configurations, Intel 31154 133 MHz PCI Bridge Applications