sc3200 Advanced Micro Devices, sc3200 Datasheet - Page 338
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sc3200
Manufacturer Part Number
sc3200
Description
Geode-tm Sc3200 Processor
Manufacturer
Advanced Micro Devices
Datasheet
1.SC3200.pdf
(447 pages)
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7.2.3
The Mixer/Blender block of the Video Processor module
performs all the necessary functions to properly mix/blend
the video data and the graphics data. These functions
include Color Space Conversion (CSC), optional Gamma
correction, color/chroma key, and the mixing/blending logic.
See Figure 7-10 for block diagram of the Mixer/Blender
Block.
Video/Graphics mixing/blending must be performed in the
RGB format. The YUV to RGB CSC (Section 7.2.3.1 on
page 339) must be used on the video data if it is in YUV
format. There is not a post mix/blend YUV to RGB CSC to
support the TFT output. If Gamma Correction (see Section
7.2.3.2) on the video data is desired, it must be done in the
color space of the input video data, which can be either
YUV or RGB. If Gamma Correction on the graphics data is
338
CSC_FOR_
YUV or RGB
GRAPHICS
Video, 4:4:4
Graphics,
CSC_FOR_VIDEO
COLOR_CHROMA_SEL
RGB
Mixer/Blender Block
YUV to
CSC
RGB
Revision 5.1
0
1
FLICKER_FILT_CNTRL = 01
/GV_GAMMA_SEL * /GAMMA_EN
Figure 7-10. Mixer/Blender Block Diagram
GV_GAMMA_SEL
Color/Chroma Key
Cursor Color Key
RGB to
Correction
CSC
YUV
Optional
Gamma
RAM
0
1
Flicker
1/2 Y
Filter
desired, it must be done in the color space of the input
graphics data, which is RGB.
The video data can be in progressive or interlaced format,
while the graphics data is always in the progressive format.
The Mixer/Blender can mix/blend either format of video
data with graphics data. F4BAR0+Memory Offset 4Ch[9]
programs the mix/blend format. Considering the color
space and the data format, the Mixer/Blender supports five
types of mixing/blending. Some of the mixing/blending
types have additional programming considerations to
enable them to work optimally. The valid mixing/blending
configurations are listed in see Table 7-1 on page 339
along with any additional programming requirements.
GV_GAMMA_SEL * /GAMMA_EN
Compare
Compare
Color/Chroma
Mixer/Blender
Key and
AMD Geode™ SC3200 Processor Data Book
Video Processor Module
CRT DACs and
TFT Interface
YUV Data
TVOUT Block
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