
S3C880A/F880A
ON-SCREEN DISPLAY
13-33
OSD BORDER/FRINGE FUNCTION
Fringing Function
The fringing function is used to display a character with a fringe (fringe means shadowed character at bottom and
right direction) width is 1 or 1/2 dot in a different color from that of the character. For all character size, fringe
width is 1 or 1/2 dot by set of OSDCOL.3. When a character is displayed with the maximum of 18 vertical dots
and 16 horizontal dots, the fringe exceeds right and bottom of the character display area. The exceeded fringe
can be displayed; however , display characters have higher priority to fringe. In this case, If you want to display
both fringe and character, you should set inter-row space and inter-column space. When 1dot fringe function is
selected, you should set minimum two dots of inter-row space or inter-column space. When 1/2 dot fringe
function is selected, you should set minimum one dot of inter-row space or inter-column space.
Fringing is enabled for each line by setting each bit of OSDFRG1 and OSDFRG2 to “1” when OSDFRG2.7=”1”.
Three bits of OSDFRG2.6-.4 are control Border color. A color for fringe is specified common to selected row and
a color for fringe to each row are controlled differently.
NOTE: When Vertical size x1 and x3 in 1/2 fringe enabled, the flickering may be generated. Because vertical 1 dot
means even and odd field, that is 1/2 dot is even or odd field area. So interlace scan TV system, you can
see the flickering.
Border Function
The Border function is used to display a character with a Border (Border means shadowed at all character
boundary) width is 1/2 dot in a different color from that of the character. For all character size, Border width is 1/2
dot. When a character is displayed with the maximum of 18 vertical dots and 16 horizontal dots, the fringe
exceeds right and bottom of the character display area. The exceeded Border can be displayed; however ,
display characters have higher priority to fringe. In this case, If you want to display both Border and character,
you should set inter-row space and inter-column space over minimum one dot. Border is enabled for each line by
setting each bit of OSDFRG1 and OSDFRG2 to “1” when OSDFRG2.7=”0”.
Three bits of OSDFRG2.6-.4 are control Border color. A color for Border is specified common to selected row
and a color for fringe to each row are controlled differently.
NOTE: When Vertical size x1 and x3, the flickering may be generated. Because vertical 1 dot means even and odd field,
that is 1/2 dot is even or odd field area. So interlace scan TV system, you can see the flickering.