Preface

1

A brief description of the contents of this manual follows.

Chapter 1, “Preface”

Provides information about the contents and organization of this book.

 

 

Chapter 2, “Introduction”

Provides an overview of the 21555 functionality and architecture.

 

 

Chapter 3, “Signal Descriptions”

Describes PCI signal pins grouped by function.

 

 

Chapter 4, “Address Decoding”

Contains details about how addresses are decoded.

 

 

Chapter 5, “PCI Bus Transactions”

Describes how the 21555 implements the theory of operation about PCI

transactions.

 

 

 

Chapter 6, “Initialization

Describes the reset operation and initialization requirements.

Requirements”

 

 

 

Chapter 7, “Clocking”

Describes 21555 clocking support.

 

 

Chapter 8, “Parallel ROM

Describes the 21555 Parallel ROM Interface.

Interface”

 

 

 

Chapter 9, “Serial ROM Interface”

Describes the 21555 Serial ROM Interface.

 

 

Chapter 10, “Arbitration”

Explains how 21555 implements primary and secondary PCI bus

arbitration.

 

 

 

Chapter 11, “Interrupt and

Describes interrupt support and scratchpad registers.

Scratchpad Registers”

 

 

 

Chapter 12, “Error Handling”

Describes parity error responses and system error reporting.

 

 

Chapter 13, “JTAG Test Port”

Explains the implementation of JTAG test port.

 

 

Chapter 14, “I2O Support”

Explains how the 21555 implements an I20 messaging unit.

 

 

Chapter 15, “VPD Support”

Describes Vital Product Data support through SROM interface.

 

 

Chapter 16, “List of Registers”

This chapter contains all of the 21555 register information and contains

a register summary.

 

 

 

Appendix A, “Acronyms”

Definition of terms used in this book.

 

 

21555 Non-Transparent PCI-to-PCI Bridge User Manual

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Intel 21555 user manual Preface, Brief description of the contents of this manual follows

21555 specifications

The Intel 21555 is a prominent microprocessor developed by Intel, designed to cater to a variety of computing needs. This processor marks a significant step forward in Intel's lineup and underscores the company's commitment to advancing technology in personal computing, enterprise solutions, and beyond.

One of the standout features of the Intel 21555 is its advanced architecture. It utilizes a multi-core design, enabling improved performance through parallel processing. This architecture allows multiple applications to run seamlessly without a decline in speed. The cores are built on a cutting-edge manufacturing process that enhances energy efficiency while maintaining high clock speeds.

The Intel 21555 supports a wide range of technologies, including Intel Turbo Boost, which enables dynamic adjustments to the processor’s performance based on workload demands. This feature allows the processor to accelerate its speed during intensive tasks, providing users with a responsive experience when it matters the most.

Another key characteristic of the Intel 21555 is its support for integrated graphics. With Intel UHD Graphics technology, users can enjoy enhanced visuals for everyday tasks such as video playback, web browsing, and light gaming. This eliminates the need for a separate graphics card for many users, particularly in home office or light gaming scenarios.

Security is a significant focus in the design of the Intel 21555. It includes built-in hardware-based security features like Intel Trusted Execution Technology and Secure Boot. These features help protect against various types of threats, ensuring that user data remains secure from malicious attacks.

The Intel 21555 is also optimized for use with Intel's platform technologies, including Intel Optane memory and Intel Rapid Storage Technology. These technologies work together to deliver faster boot times and improved system responsiveness, making computing more efficient for users.

Furthermore, the Intel 21555 is designed to support virtualization technologies, allowing multiple operating systems to run concurrently without compromising performance. This is particularly useful for developers and businesses that rely on virtualization for testing and development environments.

In summary, the Intel 21555 is a powerful and versatile processor that reflects Intel's ongoing innovation in the computing space. With its multi-core architecture, enhanced graphics capabilities, strong security features, and advanced technologies, it stands out as an excellent choice for a wide range of applications, serving both casual users and professionals alike.