ST92196A STMicroelectronics, ST92196A Datasheet - Page 115
ST92196A
Manufacturer Part Number
ST92196A
Description
8/16-bit Mcu For Tv Applications With Up To 96k Rom, On-screen-display And 1 Or 2 Data Slicers
Manufacturer
STMicroelectronics
Datasheet
1.ST92196A.pdf
(268 pages)
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OSD CONTROLLER (Cont’d)
8.5.3.1 Display Attributes
– Border color
– Border translucency
– Turn all background color into border color
– Row mode control (serial, basic parallel, extend-
– Row character count
– Horizontal and Vertical shift
– Active Range (used for vertical scrolling)
– Font matrix selection
– Size control (dot height and width definition)
– Flashing control
– Rounding control
– Fringe control
– Background color (16 user definable colors)
– Foreground color (16 user definable colors)
– Flashing control
– Italics control
– Background color (16 user definable colors)
– Foreground color (16 user definable colors)
– Character code extension
– Double height
– Double width
– Foreground palette extension (32 user definable
– Background palette extension (32 user definable
– Flashing control
– Shadowing control
– Fringe control
– Fringe control
– Rounding control
– Foreground color (32 user definable colors)
– Double size
– Horizontal and Vertical position
115/268
- ON SCREEN DISPLAY CONTROLLER (OSD)
ed parallel)
colors)
colors)
Global screen attributes:
Row parameters and attributes:
Serial character attributes:
Palette parallel character attributes:
Shape parallel character attributes:
Mouse Pointer attributes:
8.5.3.2 OSD Area
When the Display controller is turned on, the TV
screen will show a specific color prior to any data
display which is called the “Border Color”. The ef-
fective border color is fully software programmable
from a palette of 512 colors through 2 control reg-
isters.
The border area translucency can be chosen from
8 different levels, from fully transparent to fully
opaque. The 3 translucency control bits are acces-
sible through the border color control registers.
When data are displayed by the OSD, they form
rows of characters. All characters of one row are
horizontally aligned.
For each displayed character, two kinds of colors
must be programmed which are defined as:
– Background color
– Foreground color
Figure 52. OSD Area Description
8.5.3.3 Color Processing
Further color elements may be generated by the
Display controller as a result of real time pixel cal-
culations (they are not stored in the Font ROM
memory). These are:
– Rounding pixels: they must be considered as
– Fringe pixels: they are always displayed with a
– Underline pixels: they must be considered as
Foreground color
“calculated” foreground pixels.
black color and are never translucent.
“calculated” pixels. Their colors are defined
through independent underline color values.
Translucency levels are also programmable for
underline pixels.
1 Displayed character
A
A
Background color
Border Color
Area
1 Character row
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