Texas Instruments TMS320C6745 DSP - Raster Mode Display Format

1,1 2,1 3,1
2,21,2
1,3
P,1
P,2
P,3
P-2,1 P-1,1
P-1,2
LCD
Datalines(from1toL)
Datapixels(from1toP)
1,L-2
2,L-1
3,L2,L
1,L-1
1,L
P,L-2
P-1,
L-1
P-2,L P-1,L
P,L-1
P,L
Architecture www.ti.com
948
SPRUH91D–March 2013–Revised September 2016
Submit Documentation Feedback
Copyright © 2013–2016, Texas Instruments Incorporated
Liquid Crystal Display Controller (LCDC)
23.2.5.6 Subpanel Feature
In some applications, it is desired to display only the first or last few lines of the LCD panel (see
Figure 23-14). This is mainly used for power saving.
This is supported by the Raster Controller via its subpanel feature. The RASTER_SUBPANEL register
fully defines its behavior, that is, the following parameters are defined:
• Whether the first or last few lines will be refreshed.
• A line number, which is the last (or first) line to be refreshed.
• The pixel data to be loaded to the refresh area.
Note that there is only one pixel value for all the pixels in the refresh area. As a result, frame buffers and
DMA engine are not used in this case, which leads to power saving.
Figure 23-14. Raster Mode Display Format