Preliminary Information

AMD Athlon™ XP Processor Model 8 Data Sheet

25175H— March 2003

 

The Stop Grant state is also entered for the S1, Powered On

 

Suspend, system sleep state based on a write to the SLP_TYP

 

and SLP_EN fields in the ACPI-defined Power Management 1

 

control register in the Southbridge. During the S1 Sleep state,

 

system software ensures no bus master or probe activity occurs.

 

The Southbridge deasserts STPCLK# and brings the processor

 

out of the S1 Stop Grant state when any enabled resume event

 

occurs.

Probe State

The Probe state is entered when the Northbridge connects the

 

AMD Athlon system bus to probe the processor (for example, to

 

snoop the processor caches) when the processor is in the Halt or

 

Stop Grant state. When in the Probe state, the processor

 

responds to a probe cycle in the same manner as when it is in

 

the Working state. When the probe has been serviced, the

 

processor returns to the same state as when it entered the

 

Probe state (Halt or Stop Grant state). When probe activity is

 

completed the processor only returns to a low-power state after

 

the Northbridge disconnects the AMD Athlon system bus again.

4.2

Connect and Disconnect Protocol

 

 

Significant power savings of the processor only occur if the

 

 

processor is disconnected from the system bus by the

 

 

Northbridge while in the Halt or Stop Grant state. The

 

 

Northbridge can optionally initiate a bus disconnect upon the

 

 

receipt of a Halt or Stop Grant special cycle. The option of

 

 

disconnecting is controlled by an enable bit in the Northbridge.

 

 

If the Northbridge requires the processor to service a probe

 

 

after the system bus has been disconnected, it must first

 

 

initiate a system bus connect.

Connect Protocol

In addition to the legacy STPCLK# signal and the Halt and Stop

 

 

Grant special cycles, the AMD Athlon system bus connect

 

 

protocol includes the CONNECT, PROCRDY, and CLKFWDRST

 

 

signals and a Connect special cycle.

AMD Athlon system bus disconnects are initiated by the Northbridge in response to the receipt of a Halt or Stop Grant. Reconnect is initiated by the processor in response to an interrupt for Halt or STPCLK# deassertion. Reconnect is initiated by the Northbridge to probe the processor.

12

Power Management

Chapter 4

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AMD 8 manual Connect and Disconnect Protocol, Probe State, Connect Protocol

8 specifications

AMD's Ryzen 8000 series, commonly referred to as AMD 8, represents a significant leap in performance and efficiency, leveraging advanced technologies that cater to gamers, content creators, and enterprise users alike. With a continued focus on the Zen architecture, the Ryzen 8000 processors enhance performance per watt, delivering increased efficiency without compromising on power.

One of the standout features of AMD 8 is its adoption of the 5nm process technology. This innovation allows for a higher density of transistors, resulting in improved performance metrics and reduced power consumption. The smaller node size not only enhances clock speeds but also ensures that the chips generate less heat, making thermal management easier for system builders.

AMD has introduced a new architecture with the Ryzen 8000 series known as Zen 5. This architecture brings improved instructions per cycle (IPC) over its predecessors, leading to faster performance in both single-threaded and multi-threaded workloads. Gamers will benefit from higher frame rates, while professionals in fields such as video editing and 3D rendering can expect noticeable improvements in rendering times.

Another key technology in the AMD 8 lineup is the integration of AMD's next-generation RDNA graphics architecture. This allows for enhanced graphics performance in systems without dedicated GPU hardware. The combination of advanced graphics and CPU capabilities provides a more versatile platform for casual gamers and users with less demanding graphical needs.

Support for PCIe 5.0 is a game changer for the AMD 8000 series, offering double the bandwidth of its predecessor, PCIe 4.0. This feature allows for faster data transfer rates with compatible SSDs and graphics cards, ensuring that users can take full advantage of the latest storage technologies.

Additionally, AMD's Infinity Cache has made its way into the Ryzen 8000 series, further enhancing memory bandwidth. This technology reduces latency and increases efficiency by caching frequently accessed data closer to the processor.

In terms of connectivity, the Ryzen 8000 models come equipped with Wi-Fi 7 and Bluetooth 5.2, providing ultra-fast wireless connections that are essential for modern gaming and streaming experiences.

In summary, AMD's Ryzen 8000 series, or AMD 8, is designed for maximum performance and efficiency. With its advanced 5nm technology, enhanced Zen 5 architecture, integrated RDNA graphics, PCIe 5.0 support, Infinity Cache, and state-of-the-art connectivity features, it sets a new standard for processors in its class, making it a top choice for both gamers and professionals.