AU80610006225AASLBXC 데이터 시트보기 (PDF) - Intel

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AU80610006225AASLBXC

Intel® Atom™ Processor D400 and D500 Series

Intel 

Functional Description

3.2.1

3.2.1.1

3.2.1.2

CPU’s 3D and 2D engines are fed with data through the memory controller. The outputs

of the engines are surfaces sent to the memory, which are then retrieved and

processed by the CPU planes.

3D Graphics Pipeline

This CPU is the next step in the evolution of integrated graphics. In addition to running

the graphics engine at 400 MHz, the GPU has two pixel pipelines.

The 3D graphics pipeline has a deep pipelined architecture in which each stage can

simultaneously operate on different primitives or on different portions of the same

primitive. The 3D graphics pipeline is broken up into four major stages: geometry

processing, setup (vertex processing), texture application and rasterization.

The graphics is optimized by using the processor for advance software based transform

and lighting (geometry processing) as defined by DirectX*. The other three stages of

3D processing are handled on the GPU. The setup stage is responsible for vertex

processing - converting vertices to pixels. The texture application stage applies

textures to pixels. The rasterization engine takes textured pixels and applies lighting

and other environment affects to produce the final pixel value. From the rasterization

stage, the final pixel value is written to the frame buffer in memory so it can be

displayed.

3D Engine

The 3D engine on the GPU has been designed with a deep pipelined architecture, where

performance is maximized by allowing each stage of the pipeline to simultaneously

operate on different primitive or portions of the same primitive. The GPU supports

Perspective-Correct Texture Mapping, Multi-textures, Bump-Mapping, Cubic

Environment Maps, Bilinear, Trilinear and Anisotropic MIP mapped filtering, ground

shading, Alpha-blending, Vertex and Per Pixel Fog and Z/W Buffering.

The 3D Pipeline subsystem performs the 3D rendering acceleration. The main blocks of

the pipeline are the setup engine, scan converter, texture pipeline, and raster pipeline.

A typical programming sequence would be to send instructions to set the state of the

pipeline followed by rending instructions containing 3D primitive vertex data.

The engines’ performance is dependent on the memory bandwidth available. Systems

that have more bandwidth available will outperform systems with less bandwidth. The

engines’ performance is also dependent on the core clock frequency. The higher the

frequency, the more data is processed.

Texture Engine

The GPU allows an image, pattern, or video to be placed on the surface of the 3D

polygon. The texture processor receives the texture coordinate information from the

setup engine and the texture blend information from the scan converter. The texture

processor performs texture color or ChromaKey matching, texture filtering (anisotropic,

trilinear, bilinear interoplation), and YUV-to-RGB conversions.

Datasheet

31

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