Preliminary Information

AMD Athlon™ XP Processor Model 8 Data Sheet

25175H— March 2003

 

The following sections provide an overview of the power

 

management states . For more details, refer to the

 

AMD Athlon™ System Bus Specification, order# 21902.

 

Note: In all power management states that the processor is

 

powered, the system must not stop the system clock

 

(SYSCLK/SYSCLK#) to the processor.

Working State

The Working state is the state in which the processor is

 

executing instructions.

Halt State

When the processor executes the HLT instruction, the processor

 

enters the Halt state and issues a Halt special cycle to the

 

AMD Athlon system bus. The processor only enters the low

 

power state dictated by the CLK_Ctl MSR if the system

 

controller (Northbridge) disconnects the AMD Athlon system

 

bus in response to the Halt special cycle.

 

If STPCLK# is asserted, the processor will exit the Halt state

 

and enter the Stop Grant state. The processor will initiate a

 

system bus connect, if it is disconnected, then issue a Stop

 

Grant special cycle. When STPCLK# is deasserted, the

 

processor will exit the Stop Grant state and re-enter the Halt

 

state. The processor will issue a Halt special cycle when

 

re-entering the Halt state.

 

The Halt state is exited when the processor detects the

 

assertion of INIT#, RESET#, SMI#, or an interrupt via the INTR

 

or NMI pins, or via a local APIC interrupt message. When the

 

Halt state is exited, the processor will initiate an AMD Athlon

 

system bus connect if it is disconnected.

Stop Grant States The processor enters the Stop Grant state upon recognition of assertion of STPCLK# input. After entering the Stop Grant state, the processor issues a Stop Grant special bus cycle on the AMD Athlon system bus. The processor is not in a low-power state at this time, because the AMD Athlon system bus is still connected. After the Northbridge disconnects the AMD Athlon system bus in response to the Stop Grant special bus cycle, the processor enters a low-power state dictated by the CLK_Ctl MSR. If the Northbridge needs to probe the processor during the Stop Grant state while the system bus is disconnected, it must first connect the system bus. Connecting the system bus

10

Power Management

Chapter 4

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AMD 8 manual Working State, Halt State

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.