DS_S1D2502A01 Datasheet, PDF (44/57 Pages) Samsung semiconductor – VIDEO AMP MERGED OSD PROCESSOR FOR MONITORS

Preliminary
VIDEO AMP MERGED OSD PROCESSOR FOR MONITORS
S1D2502A01
VISUAL EFFECTS
• Box Drawing
Set the row attribute register's boxe bit to '1' and enable the box feature. Then set the character & attribute
register's BOX bit to select one of 4 modes. Or, use the character & attribute register's BINV bit to inverse the
white and black areas of the box mode selected by the BOX bit.
BOX0
BOX1
o
1
0
BOX OFF
A
1_A
A
Figure 18. Box Drawing
The principle behind the boxing feature is shown below.
HDOT0
HDOT11
17
17
17
0
0
0
BOX<1:0> 01
BOX<1:0> 10
BOX<1:0> 11
Out of the 12 horizontal dots and 18 vertical lines that make 1 character, make the first and 12th horizontal dots to
HDOT0/HDOT11, and the first and 18th vertical lines to DOTLINE-0H/DOTLINE-17H in order to carry out box
drawing for 1 dot outside the character.
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