Error Handling

Table 29. Parity Error Responses (Sheet 2 of 3)

Type of

Type of

PER

Action Taken

Error

Transaction

PS

 

Queues and forwards transaction with parity error.

0 —

Sets primary Parity Error Detected bit.

 

Downstream

 

Returns TRDY# (and STOP# when multiple data phases

 

Delayed

 

 

requested).

 

Write

1 —

Transaction not forwarded.

 

 

 

 

 

• Sets primary Parity Error Detected bit.

 

 

 

Asserts p_perr_l.

 

 

 

 

 

 

 

0 —

Transaction completes normally on primary bus.

 

 

 

 

 

 

1 —

• Transaction completes normally on primary bus.

 

Upstream

Sets primary Data Parity Detected bit when p_perr_l is asserted.

 

 

 

Delayed

 

 

 

 

 

• Transaction completes normally on primary bus.

 

Write

 

 

 

• Sets primary Data Parity Detected bit when p_perr_l is asserted.

 

 

1 1

 

 

• Asserts s_perr_l when returning s_trdy_l to initiator on secondary

 

 

 

 

 

 

 

bus (for both CSR and BAR forwarding mechanisms).

Data Parity

 

 

 

 

Downstream

 

 

Error on

Delayed

The 21555 is returning data, all action is taken by initiator.

Primary

Read

 

 

 

 

 

Bus

 

 

 

 

 

 

• Returns read data with bad parity to initiator (for both CSR and BAR

 

 

 

 

 

0 —

 

forwarding mechanisms).

 

 

 

• Sets primary Parity Error Detected bit.

 

Upstream

 

 

 

 

 

• Returns read data with bad parity to initiator (for both CSR and BAR

 

Delayed

 

 

 

 

forwarding mechanisms).

 

Read

 

 

 

 

Sets primary Parity Error Detected bit.

 

 

1 —

 

 

 

• Sets primary Data Parity Detected bit.

 

 

 

Asserts p_perr_l.

 

 

 

 

 

 

0 —

• Writes the data normally.

 

 

• Sets the primary Parity Error Detected bit.

 

Configuration

 

 

 

 

 

 

Register or

 

Writes the data normally.

 

CSR Write

1 —

Sets the primary Parity Error Detected bit.

 

 

 

 

 

Asserts p_perr_l.

 

 

 

 

 

 

Configuration

 

 

 

Register or

Returns read data normally.

 

 

CSR Read

 

 

 

 

 

 

PER: Parity Error Response bit (Primary Secondary).

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

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Intel 21555 user manual Parity Error Responses Sheet 2, Error Transaction, Asserts pperrl

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.