Introduction

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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.

1.1Overview

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

1.2Features

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.

21152 PCI-to-PCI Bridge Evaluation Board User’s Guide

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Intel 21152 manual Introduction, Overview, Features
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21152 specifications

The Intel 21152 is a highly regarded chip designed specifically for use in a variety of networking applications, including Ethernet and Token Ring networks. Introduced in the 1990s, this device played a critical role in advancing network communication technologies by providing high-performance data transfer capabilities and supporting various network protocols.

One of the main features of the Intel 21152 is its ability to handle dual 10BASE-T Ethernet ports, allowing for flexibility in network configurations. This dual-port capability is essential for implementing redundancy and load balancing in networking environments, ensuring that data can be transmitted efficiently even in the event of device failures. Furthermore, the chip is capable of supporting both full-duplex and half-duplex modes, accommodating different network setups and enhancing overall throughput.

The Intel 21152 utilizes a sophisticated architecture that integrates a range of technologies to optimize performance. It features a built-in microprocessor that enhances its processing capabilities, enabling it to manage data packets intelligently. Additionally, the chip supports a variety of networking standards such as IEEE 802.3, which ensures compatibility with a wide range of devices and systems in existing network infrastructures.

Another key characteristic of the Intel 21152 is its low power consumption, which was particularly notable for its time. This efficiency not only reduces operational costs but also contributes to the longevity of devices utilizing the chip, making it a practical choice for manufacturers seeking to create reliable networking equipment.

Moreover, the Intel 21152 supports several memory interfaces, allowing for the integration of external memory to further enhance its functionality. This capability is beneficial for applications requiring high-speed data buffering and processing.

In summary, the Intel 21152 emerged as a prominent networking chip with its dual-port support, efficient architecture, compatibility with various standards, and low power requirements. Its advanced features made it a valuable component in the development of networking solutions, solidifying its reputation in the industry and influencing the design of subsequent generations of network devices. With its significant technological advancements, the Intel 21152 paved the way for improved connectivity and communication in computing environments.
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