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21555 PCI-to-PCI Bridge Evaluation Board User’s Guide 5

Introduction 1

This User’s Guide describes the 21555 PCI-to-PCI nontransparent Bridge Evaluation Board which

is referred to as the DE1B55503.

1.1 Overview

The DE1B55503 is a PCI expansion board that is used to evaluate the operation of the 21555 when

it is used as a gateway to an intelligent subsystem. The subsystem can use a variety of PCI devices

and local processors. The DE1B55503 can be used to:

• Develop initialization code to configure the 21555 and associated logic and devices on the

local PCI bus as an intelligent controller.

• Evaluate the operation of the 21555 with a variety of PCI devices configured in an intelligent

subsystem.

• Build and evaluate a system using synchronous and asynchronous clocking.

• Test features:

— Intelligent Input/Output (I2O) transactions.

— Power management features.

— Vital Product Data (VPD) support.

1.2 Features

The DE1B55503:

• Complies fully with the protocol and electrical standards of the PCI Local Bus Specification,

Revision 2.3.

• Includes a 21555 “nontransparent” PCI-to-PCI Bridge that provides bridging between two

processor domains.

• Includes a host PCI interface that plugs into any 5V PCI option card slot.

• Provides three local bus 5V PCI bus option card slots. Slot 1 (see Figure 1 on page 6) may be

used as a local processor or system slot.

• Includes support, products, and documentation.

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