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S1D2502B01 Datasheet(PDF) 38 Page - Samsung semiconductor

Part # S1D2502B01
Description  VIDEO AMP MERGED OSD PROCESSOR FOR MONITORS
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Manufacturer  SAMSUNG [Samsung semiconductor]
Direct Link  http://www.samsung.com/Products/Semiconductor
Logo SAMSUNG - Samsung semiconductor

S1D2502B01 Datasheet(HTML) 38 Page - Samsung semiconductor

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VIDEO AMP MERGED OSD PROCESSOR FOR MONITORS
S1D2502B01
37
Preliminary
COLORING
If you have an Intensity feature, the number of possible colors you can express becomes doubled. In other words,
the number of colors you can represent with three colors blue, green, and red is 8 ( = 23), but with the intensity
feature, it is 16 ( = 24).
Character Color
Character color is assinged for each font, and the 4 components for expressing a color are listed below.
Raster Color
According to the 'BOXE' bit setting, raster color can be assigned in units of font or row. There is a trade-off in either
case. If 'BOXE' Bit is set to '1', the box drawing feature can be carried out in units of font, but the raster color can
only be assigned in units of row. On the other hand, if 'BOXE' bit is set to '0', the box drawing feature can't be
carried out, but you can assign raster color in units of font.
Blue
Character & attribute register's B bit[C]
Green
Character & attribute register's G bit[B]
Red
Character & attribute register's R bit[A]
Intensity
Character & attribute register's BLINK/FINT bit[9]
Row attribute register's INTE bit[D]
Row attribute register's CINT bit[4]
If all 3 bits are set to '1', the character intensity feature is enabled.
Blue
Row attribute register's RB bit[8] if the row attribute register's 'BOXE' bit is '1', and character
& attribute register's 'BINV' bit[F] if BOXE' bit is '0'.
Green
Row attribute register's RG bit[7] if row attribute register's 'BOXE' Bit is '1', and character &
attribute register's 'BOX1' bit[E] if 'BOXE' bit is '0'.
Red
Row attribute register's RR bit[6] if row attribute register's 'BOXE' bit is '1', and character &
attribute register's 'BOX0' bit[D] if 'BOXE' bit is '0'.
Intensity
Character & attribute register's BLINK/FINT bit[9]
Row attribute register's INTE bit[D]
Row attribute register's RINT bit[5]
If all 3 bits are set to '1', the raster intensity feature is enabled.
Notes for When Making S1D2502B01 Fonts
Address 000h is appointed as blank data. RAM's initial values are all 0, and all bits are written as 0 when you
erase the RAM, so blank data means the initial value. In other words, blank data means 'do nothing'. You don't
need to write any data for the space font, except for 000h. It just needs to be an undotted area.


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