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SC2200 Datasheet(PDF) 329 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # SC2200
Description  Thin Client On a Chip
PDF  433 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

SC2200 Datasheet(HTML) 329 Page - National Semiconductor (TI)

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Revision 3.0
329
www.national.com
Video Processor Module (Continued)
Mixing/Blending Operation
Table 6-2 on page 329 shows the truth table used to create
the flow diagram, Figure 6-12 on page 330, that the
Mixer/Blender logic uses to determine each pixels disposi-
tion.
Table 6-2. Truth Table for Alpha Blending
COLOR_
CHROMA_SEL1
Windows
Configuration2
Graphics
Data Match
Cursor
Color Key
Graphics
Data Match
Normal
Color Key
Video Data
Match
Normal
Color Key
Mixer Output
x
x
x
Yes
x
x
Cursor Color
x
Not in Video
Window
x
No
x
x
Graphics Data
Graphics Color
Key
(COLOR_
CHROMA_SEL
=0)
Not inanAlpha
Window
GFX_INS_VIDEO = 0
No
Yes
x
Video Data
No
No
x
Graphics Data
GFX_INS_VIDEO = 1
No
x
x
Video Data
Inside Alpha
Window x
ALPHAx_COLOR_REG_EN = 1
No
Yes
x
Color from
Color Register
ALPHAx_COLOR_REG_EN = 0
No
Yes
x
Video Data
x
No
No
x
Alpha-blended
Data
Video Chroma
Key
(COLOR_
CHROMA_SEL
=1)
Not inanAlpha
Window
GFX_INS_VIDEO = 0
No
x
Yes
Graphics Data
No
x
No
Video Data
GFX_INS_VIDEO = 1
No
x
x
Graphics Data
Inside Alpha
Window x
ALPHAx_COLOR_REG_EN = 1
No
x
Yes
Color from
Color Register
ALPHAx_COLOR_REG_EN = 0
No
x
Yes
Graphics Data
x
No
x
No
Alpha-blended
Data
1.
COLOR_CHROMA_SEL: F4BAR0+Memory Offset 04h[20].
2.
GFX_INS_VIDEO: F4BAR0+Memory Offset 4Ch[8].
ALPHAx_COLOR_REG_EN: F4BAR0+Memory Offsets 68h[24], 78h[24], and 88h[24].



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