AMD Confidential

User Manual

November 21st, 2008

7.18 SMB Hub Device

The SMB hub device is used to connect one SMBus to any of four SMBus branches. The device is programmed via read-byte and write-byte commands on the SMBus where the 7-bit address field is 0x18.

The SMB hub device models the combination of two physical devices manufactured by Philips Semiconductors: the PCA9516 5-channel I2C hub, and the PCA9556 Octal SMBus and I2C registered interface. In the simulator‟s device model the two devices are configurable via GPIO x enables segment x, as shown in Figure 7-30.

Interface

The SMB hub has five SMBus interfaces. SMB0 can be connected within the SMB hub to any of the four other SMBuses (SMB[1..3]). Typically, SMB0 is connected to a SMBus connection on a Southbridge device, and the other SMBus ports are connected to other devices in the system.

Initialization and Reset State

When first initialized or reset the SMB hub registers are set to their default state. The internal registers and their default states are described in the PCA9556 data sheet.

Contents of a BSD

The current state of all internal registers and any internal state variables are saved in the BSD.

Configuration Options

The SMB Hub device allows you to enable up to eight GPIO segments (GPIO0 – GPIO7) to connect SMB devices to SMB hub device, as shown in Figure 7-30.

Chapter 7: Device Configuration

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4.4.5 specifications

AMD 4.4.5 is a robust version of the AMD software ecosystem that focuses on enhanced performance, stability, and efficiency for users relying on AMD processors and graphics cards. This iteration brings various features and technologies designed to optimize gaming, professional applications, and general computing tasks.

One of the standout enhancements in AMD 4.4.5 is the integration of Smart Access Memory technology, which allows the CPU to access the full graphics memory directly. This feature enhances data flow between the CPU and GPU, leading to improved frame rates and overall performance, especially in memory-intensive games. Users can experience a marked increase in gaming performance without the need for additional hardware upgrades.

Another significant feature introduced is the updated Radeon Software Adrenalin Edition. This software update encompasses optimizations for various games, ensuring that gamers can enjoy a seamless experience with the latest titles. The Adrenalin interface also provides features such as Radeon Chill, which helps reduce power consumption during less demanding scenes, and Radeon Anti-Lag, designed to minimize input lag and enhance responsiveness in competitive gaming.

Additionally, AMD 4.4.5 brings the latest drivers that include important performance enhancements and bug fixes that allow for greater system stability. Regular updates ensure that users have the best experience with their AMD hardware, and it significantly bolsters compatibility with the latest gaming titles and software applications.

AMD's Enhanced Sync technology offers users the ability to eliminate screen tearing and stuttering while delivering smooth gameplay. It dynamically synchronizes the refresh rate of the display with the frame rates produced by the GPU, improving the visual experience significantly.

With the introduction of FidelityFX Super Resolution, AMD continues to bolster its suite of technologies that enhance graphics quality and performance. This feature allows lower-resolution images to be upscaled effectively, making it easier for users to enjoy high-end visuals without taxing their hardware excessively.

In summary, AMD 4.4.5 represents a comprehensive update for users by integrating cutting-edge technologies that cater to a wide range of applications from gaming to content creation. With enhancements across the board, AMD reaffirms its commitment to providing high-performance solutions that keep pace with the ever-evolving technology landscape. Whether for gaming aficionados or professional creators, the capabilities offered in this version make it a significant milestone in the AMD software ecosystem.
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