Atmel Evaluation Kit AT91SAM9X35-EK AT91SAM9X35-EK Data Sheet
Product codes
AT91SAM9X35-EK
1091
SAM9X35 [DATASHEET]
11055E–ATARM–10-Mar-2014
46.6.3.3 Window Position, Size, Scaling and Striding Attributes
XPOS, YPOS: fields define the position of the overlay window.
XSIZE, YSIZE: fields define the size of the displayed window.
XMEM_SIZE,YMEM_SIZE: fields define the size of the image frame buffer.
XSTRIDE, PSTRIDE: fields define the line and pixel striding.
XFACTOR, YFACTOR: fields define the scaling ratio.
The position and size attributes are to be programmed to keep the window within the display area.
When the color lookup mode is enabled the following restrictions apply on the horizontal and vertical window size:
Pixel striding is disabled when CLUT mode is enabled.
When YUV mode is enabled the following restrictions apply on the window size:
In RGB mode, there is no restriction on the line length.
Table 46-8. Color Lookup Mode and Window Size
CLUT Mode
x-y Size Requirement
1 bpp
multiple of 8 pixels
2 bpp
multiple of 4 pixels
4 bpp
multiple of 2 pixels
8 bpp
free size
Table 46-9. YUV Mode and Window Size
YUV Mode
x-y Requirement,
Scaling Turned Off
x-y Requirement,
Scaling Turned On
AYUV
free size
x-y size is greater than 5
YUV 4:2:2 packed
xsize is greater than 2 pixels
x-y size is greater than 5
YUV 4:2:2
semiplanar
semiplanar
xsize is greater than 2 pixels
x-y size is greater than 5
YUV 4:2:2 planar
xsize is greater than 2 pixels
x-y size is greater than 5
YUV 4:2:0
semiplanar
semiplanar
xsize is greater that 2 pixels
x-y size is greater than 5
YUV 4:2:0 planar
xsize is greater than 2 pixels
x-y size is greater than 5