E602204_HD64413A 查看數據表（PDF） - Mitsumi

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产品描述 (功能)

生产厂家

E602204_HD64413A

SuperH RISC engine Peripheral LSI

Mitsumi 

(2) Graphics Accelerator

A Dedicated hardware is used for the inefficient processing in the CPU. Thus, CPU bus

efficiency is improved and high-speed realtime drawing is realized (see figure 1.5).

Dedicated hardware is used for

insufficient processing in CPU

Making display list by CPU

Drawing in UGM according

to display list by Q2SD

CPU bus efficiency is improved

by using Q2SD for all rendering

processing High-speed realtime

drawing

Rendering

SD Operation

2

Geometric

Operation

SuperH

RISC engine

Control

Coordinates

Operation

Figure 1.5 Graphics Accelerator

(3) Pipeline Graphics Processing:

High-speed graphics processing is enabled by pipelining the CPU geometry processing and

Q2SD rendering processing (see figure 1.6).

CPU Geometry 1 Rendering 1 Geometry 2 Rendering 2 Geometry 3 Rendering 3

CPU Geometry 1 Geometry 2 Geometry 3

Q2SD

Rendering 1 Rendering 2 Rendering 3

Processing time

Figure 1.6 Pipeline Graphics Processing

(4) Use of Write-Only Drawing:

Write-only drawing (a drawing method using only write operations) is used to improve drawing

performance.

Rev. 2.0, 09/02, page 5 of 366

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