Справочник Пользователя для AMD LX 900@1.5W

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The Graphics Processor is based on the graphics proces-
sor used in the AMD Geode™ GX processor with several
features added to enhance performance and functionality.
Like its predecessor, the AMD Geode LX processor’s
Graphics Processor is a BitBLT/vector engine that supports
pattern generation, source expansion, pattern/source
transparency, 256 ternary raster operations, alpha blenders
to support alpha-BLTs, incorporated BLT FIFOs, a
GeodeLink™ interface and the ability to throttle BLTs
according to video timing. Features added to the Graphics
Processor include:

• Command buffer interface

• Hardware accelerated rotation BLTs

• Color depth conversion

• Palletized color

• Full 8x8 color pattern buffer

• Channel 3 - third DMA channel

• Monochrome inversion

The block diagram of the AMD Geode LX processor’s
Graphics Processor is shown in Figure 6-10. Table 6-7 on
page 238 presents a comparison between the Graphics
Processor features of the AMD Geode GX and LX proces-
sors.

Pattern

Registers

Pattern

Expansion

Raster

Source

Aligner &

Expansion

Operation

Source &

Destination

Read FIFOs

Alpha
Blend

Unit

Write

Accumulation

FIFO

GeodeLink™ Interface Unit 0

(GLIU0)

Channel 3
Data Flow

Control

Channel 3

Data

Formatter

2K FIFO

and

LUT and

Pattern

Memory

Channel 3

Fetch

Engine

Command

Buffer Control

Logic and

Registers