AGXD533AAXF0CC AMD (ADVANCED MICRO DEVICES), AGXD533AAXF0CC Datasheet - Page 335

• Manufacturer Part Number: AGXD533AAXF0CC
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of AGXD533AAXF0CC

• Device Core: X86
• Device Core Size: 64b
• Frequency (max): 400MHz
• Instruction Set Architecture: RISC
• Supply Voltage 1 (typ): 1.5V
• Operating Supply Voltage (max): 1.58V
• Operating Supply Voltage (min): 1.42V
• Operating Temp Range: 0C to 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 368
• Package Type: BGD
• Lead Free Status / Rohs Status: Not Compliant

Video Processor
6.7.6
Video data is mixed with graphics data according to the
video window position. The video window position is pro-
grammable via the Video X Position (VP Memory Offset
010h) and Video Y Position (VP Memory Offset 018h) reg-
isters. A color-keying and alpha-blending mechanism is
employed to compare either the source (video) or destina-
tion (graphics) color to the color-key programmed via the
Video Color-Key register (VP Memory Offset 028h), and to
select the appropriate bits in the Video Color Mask register
(VP Memory Offset 030h). This mechanism greatly
reduces the software overhead for computing visible pix-
els, and ensures that the video display window can be par-
tially hidden by overlapping graphics data. See Figure 6-
24.
The Video Processor module accepts graphics data at the
graphics DOT clock rate. The Video Processor module can
display graphics resolutions up to 1600x1200 on CRT, at
color depths up to 16 bpp while simultaneously overlaying
a video window.
6.7.6.1
Alpha-blending can be performed using RGB blending or
YUV blending:
• For RGB blending, graphic data in RGB format and
• YUV blending eliminates video de-interlacing and YUV
AMD Geode™ GX Processors Data Book
Video YUV
Graphics
video data in RGB format (YUV to RGB conversion) are
blended.
to RGB conversion of video data. For YUV blending, the
graphic data is converted to YUV and blended with
video in YUV format.
Video Overlay
Alpha-Blending
VG_CK
Optional
0
1
YUV to
CURSOR_COLOR_KEY
RGB
CSC
CUR_COLOR_MASK
VID_CLR_MASK
VID_CLR_KEY
CSC_for_VIDEO
Figure 6-24. Mixer Block Diagram
0
1
1
0
VSYNC
GV_PAL_BP
Compare
Compare
Up to three alpha windows can be defined in the video win-
dow. Alpha values for blending are defined in each of these
windows. If alpha windows overlap, the alpha window with
the highest priority (programmable) is used (for the over-
lapped area).
Alpha-blending is performed using the following formula:
Where G is the graphic value and V is the video value of
the current pixel.
Color-Keys
A color-key mechanism is used with alpha-blending. Color-
key values are defined for a cursor color-key and for a nor-
mal color-key. The cursor color-key is compared to each
24-bit value of graphic input data. If a match is found, the
selected cursor color is displayed. Two possible cursor col-
ors can be defined. The COLOR_REG_OFFSET field (in
the Cursor Color-Key register, VP Memory Offset 0A0h) is
used to select the bit in the input graphic stream that deter-
mines the cursor color to use. Each cursor color is stored in
a separate cursor color register. Figure 6-25 on page 336
illustrates the logic used to determine how to implement
the color-key and alpha-blending logic.
Registers and Cursor
Correction RAM
Current Pixel
alpha * G + (1 - alpha) * V
Location
Color Values
Gamma
Alpha Color
31505E
Color-Key
Blending
Logic
and
RGB
CRT
DAC
335