ALXD800EEXJ2VD AMD (ADVANCED MICRO DEVICES), ALXD800EEXJ2VD Datasheet - Page 390

• Manufacturer Part Number: ALXD800EEXJ2VD
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of ALXD800EEXJ2VD

• Operating Temperature (min): 0C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

6.7.2.3
The Video Processor module supports horizontal down-
scaling (see Figure 6-25). The downscaler can be imple-
mented in the Video Processor module to shrink the video
window by a factor of up to 8:1, in one-pixel increments.
The Downscaler Factor Select (m) is programmed in the
Video Downscaler Control register (VP Memory Offset
078h[4:1]). If bit 0 (DCF) of this register is set to 0, the
downscaler logic is bypassed.
Note: Horizontal downscaling is supported in 4:2:2 YUV
The downscaler supports up to 29 downscaler factors.
There are two types of factors:
390
video format only, not 4:2:0 YUV or 5:6:5 RGB.
Horizontal Downscaling
Video
Input
33234C
Coefficients
Figure 6-25. Downscaler Block Diagram
Filtering
4-Tap
4x8
Bypass
Downscaler
Downscale
Horizontal
Factors
• Type A is (1/m+1). One pixel is retained, and m pixels
• Type B is (m/m+1). m pixels are retained, and one pixel
Bit 6 of the Video Downscaler Control register (VP Memory
Offset 078h) selects the type of downscaling factor to be
used.
Note: There is no vertical downscaling in the Video Pro-
are dropped. This enables downscaling factors of 1/8, 1/
7, 1/6, 1/5, 1/4, 1/3, and 1/2.
is dropped. This enables downscaling factors of 2/3, 3/4,
4/5, 5/6, 6/7, 7/8.
cessor module.
AMD Geode™ LX Processors Data Book
To line
buffers
Video Processor