List of Registers

Table 117. Secondary SERR# Disable Register

 

 

 

 

 

 

 

Upstream Delayed

 

Disables s_serr_l assertion when the 21555 discards an upstream

 

1

R/W

delayed read transaction request after receiving 224 target retries

 

Read Transaction

from the primary bus target.

 

 

Discarded

 

 

 

 

Reset value is 0

 

 

 

 

 

 

 

 

 

 

 

Upstream Delayed

 

Disables s_serr_l assertion when the 21555 discards an upstream

 

2

R/W

delayed write transaction request after receiving 224 target retries

 

Write Transaction

from the primary bus target.

 

 

Discarded

 

 

 

 

Reset value is 0

 

 

 

 

 

 

 

 

 

 

 

 

 

Disables s_serr_l assertion when the 21555 discards an upstream

 

3

Upstream Posted

R/W

posted write transaction after receiving 224 target retries from the

 

Write Data Discarded

primary bus target.

 

 

 

 

 

 

 

Reset value is 0

 

 

 

 

 

 

 

Target Abort during

 

Disables s_serr_l assertion when the 21555 detects a target abort

 

4

Upstream Posted

R/W

on the primary interface in response to an upstream posted write.

 

 

Write

 

Reset value is 0

 

 

 

 

 

 

 

Master Abort during

 

Disables s_serr_l assertion when the 21555 detects a master abort

 

5

Upstream Posted

R/W

on the primary interface when initiating an upstream posted write.

 

 

Write

 

Reset value is 0

 

 

 

 

 

 

 

Upstream Posted

 

Disables s_serr_l assertion when the 21555 detects p_perr_l

 

6

R/W

asserted during an upstream posted write.

 

Write Parity Error

 

 

 

Reset value is 0

 

 

 

 

 

 

 

 

 

 

7

Reserved

R

Reserved. Returns 0 when read.

 

 

 

 

 

16.13Init Registers

This section describes the Power management, Reset, and Hot-swap registers. See Chapter 2 for theory of operation information.

Table 118. Power Management ECP ID and Next Pointer Register

• Primary byte offset: DD:DCh

• Secondary byte offset: DD:DCh

Bit

Name

R/W

Description

 

 

 

 

7:0

PM ECP ID

R

Power Management Enhanced Capabilities Port ID. Read only as 01h to identify

these ECP registers as Power Management registers.

 

 

 

 

 

 

 

 

 

 

Pointer to next ECP registers. Reads as E4 to indicate the first register of the

15:8

PM Next Ptr

R

next set of ECP registers, which support Vital Product Data, and resides at offset

 

 

 

E4h.

 

 

 

 

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

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Intel 21555 user manual Init Registers, Power Management ECP ID and Next Pointer Register, Pm Ecp Id

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.