Datasheet

968
SAM9G15 [DATASHEET]
11052D–ATARM–31-Oct-12
44.6.3 Display Software Configuration
44.6.3.1 System Bus Access Attributes
These attributes are defined to improve bandwidth of the pixel stream.
z LOCKDIS field: when set to one the AHB lock signal is not asserted when the PSTRIDE value is different from
zero (rotation in progress).
z ROTDIS field: when set to one the Pixel Striding optimization is disabled.
z DLBO field: when set to one only defined burst lengths are performed when the DMA channel retrieves the data
from the memory.
z BLEN field: defines the maximum burst length of the DMA channel.
z SIF field: defines the targeted DMA interface.
44.6.3.2 Color Attributes
z CLUTMODE field: selects the color lookup table mode
z RGBMODE field: selects the RGB mode.
z YUVMODE field: selects the Luminance Chrominance mode.
44.6.3.3 Window Position, Size, Scaling and Striding Attributes
z XPOS, YPOS: fields define the position of the overlay window.
z XSIZE, YSIZE: fields define the size of the displayed window.
z XMEM_SIZE,YMEM_SIZE: fields define the size of the image frame buffer.
z XSTRIDE, PSTRIDE: fields define the line and pixel striding.
z XFACTOR, YFACTOR: fields define the scaling ratio.
The position and size attributes are to be programmed to keep the window within the display area.
Table 44-7. DMA address alignment when YUV Mode is selected
YUV Mode DMA Address Alignment
32 bpp AYCrCb 32 bit
16 bpp YCrCb 4:2:2 32 bit
16 bpp semiplanar YCrCb 4:2:2
Y 8 bit
CrCb 16 bit
16 bpp planar YCrCb 4:2:2
Y 8 bit
Cr 8 bit
Cb 8 bit
12 bpp YCrCb 4:2:0
Y 8 bit
CrCb 16 bit
12 bpp YCrCb 4:2:0
Y 8 bit
Cr 8 bit
Cb 8 bit