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21152 PCI-to-PCI Bridge Evaluation Board
User’s Guide 1-1
Introduction
1
This document describes the Intel 21152 PCI-to-PCI Bridge Evaluation Board (also referred to as
the EB152). The EB152 is an evaluation and development board for systems based on the Intel
21152 PCI-to-PCI Bridge chip (the 21152).
Intel’s 21152 is a second-generation PCI-to-PCI bridge and is fully compliant with the electrical
and protocol requirements of the PCI-to-PCI Bridge Architecture Specification, Revision 2.1, and
the PCI-to-PCI Bridge Architecture Specification, Revision 1.0. The 21152 provides full support
for delayed transactions, which enables the buffering of memory read, I/O, and configuration
transactions. The 21152 has separate posted write, read data, and delayed transaction queues with
significantly more buffering capability than first-generation bridges.
For detailed information about the 21152, refer to the 21152 PCI-to-PCI Bridge Data Sheet.
1.1 Overview
This chapter provides an overview of the 21152 PCI-to-PCI Bridge Evaluation Board EB152 and
includes information about the following topics:
• Jumper location
• Secondary slot numbering and IDSEL mapping
• Typical configurations
The EB152 is a universal PCI expansion board that is used to evaluate the operation of the 21152 in
various configurations, and with a variety of PCI devices. The EB152 can be used to perform the
following functions:
• Develop initialization code to configure a PCI-to-PCI bridge and the PCI devices behind the
bridge
• Evaluate the operation of a PCI-to-PCI bridge with a variety of PCI devices attached to the
secondary bus
• Build and evaluate a flexible hierarchy for multiple PCI buses
1.2 Features
The EB152 has the following features:
• Complies fully with the protocol and electrical standards of the PCI Local Bus Specification,
Revision 2.1.
• Includes a 21152 PCI-to-PCI Bridge that provides bridging between a primary and secondary
bus.
• Includes a primary PCI bus that plugs into any 5-V or 3.3-V PCI option card slot.