Introduction

1.7Secondary Slot Numbering and IDSEL Mapping

Figure 4 gives the bus slot numbering. Table 5 shows how a Product Name numbers the Local slots in response to a Type 0 or Type 1 configuration cycle. The local bus lines s_ad<24> and s_ad<31:28> are used as local Initilization Device Select (IDSEL) lines.

Figure 4. Local PCI Slot Numbering

OPTIONAL SLOT

2

1

 

 

 

 

 

 

 

PCI option and slot

 

 

 

 

 

SLOT 2

 

Device 20/Zero (0)

 

 

 

 

 

 

J7

 

 

 

 

 

 

 

L1+

 

L2

 

 

 

 

J8

 

E9

 

 

 

 

J101

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

E8

 

 

SLOT 1

 

PCI option and PICMG

 

 

 

 

 

 

slot - Device 13/13

 

 

 

 

 

 

 

 

 

E7

 

 

 

 

J102

 

 

 

 

OPTIONAL SLOT

 

 

 

 

 

 

 

 

 

 

 

 

E5

 

 

 

Device 8/8

 

 

 

 

J4

J6

J2

 

 

 

 

 

Y1

 

 

1

2

3

4

5

E3

 

 

J21

 

 

 

 

 

 

 

1

2

3

4

5

E4

E2

J5

 

 

 

 

 

 

Device None/17

J20

 

 

 

 

J1

 

 

 

 

 

 

 

 

 

1

2

3

4

5

 

21555

 

J9

 

 

 

 

 

 

E1

 

 

 

 

 

 

 

A8411-01

The 21555 cannot respond to Type 1 but does respond to Type 0 configuration cycles. During a Type 0 configuration from a Local processor in the PICMG slot, the numbers change so that J7 is counted one way but reflected as zero the other way.

Table 5. Slot and IDSEL Mapping

 

 

Device Configuration Numbering

 

 

 

 

Physical Connector

IDSEL Lines

Type 1

Type 0

Numbering

 

 

 

 

 

 

 

J7 (Slot 2)

S_AD31

20

zero (0)

 

 

 

 

J102 (Opt. Slot)

S_AD24

8

8

 

 

 

 

J101 (Slot 1)

S_AD29

13

13

 

 

 

 

E2

S_AD28

(no response)

17

(21555)

 

 

 

 

 

 

 

12

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

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Intel 21555 manual Secondary Slot Numbering and Idsel Mapping, Slot and Idsel Mapping, Device Configuration Numbering, Type

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.