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uPD6461 Datasheet

  • uPD6461

  • OSD LSI

  • 370.89KB

  • NEC   NEC

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PD6461, 6462
鈥?Rimming control bit
This bit is used to specify whether all characters displayed on the screen are rimmed.
Rimming:
Whenever there is a dot at the right or left edge of the display area for a character, rimming of the dot will
encroach into the adjacent character display area. For dots at the top or bottom edge, however, no rim is
added either above the top edge or below the bottom edge, that is, rimming does not encroach into the
character display area above or below. Other dots are rimmed as shown below.
Example
Character dots
Rim
The width of a rim is always 1t (minimum dot) regardless of the character size.
鈥?Background control bits
These bits are used to select no background, minimum background, or overall background as the background type.
The background color is specified with the background/rim color control command.
No background:
Outputs only character data.
of one dot at each side.
Overall background:
Adds a background over the entire screen.
Minimum background: Adds a background of an area that is wider than the character display area by a minimum
鈥?Background and rimming in RGB+V
C1
+V
C2
mode
Characters for which the V
C2
channel is specified with the displayed character control command are not output to
the RGB or V
C1
channel. When background (minimum/overall) is specified for the RGB or V
C1
channel, no background
is added to the areas for the V
C2
-specified characters. By contrast for the V
C2
channel, a background is added only
to those areas for V
C2
-specified characters. (Refer to
1.4 DISPLAY IN RGB+V
C1
+V
C2
MODE
and
1.4.4 Display of
V
C2
-Specified Characters
for details of the display of V
C2
-specified character areas for the RGB or V
C1
channel.)
When RGB+3BLK (RGB compatible blanking) mode is selected, only the background control bits for the RGB
channel are valid. Those for the V
C1
and V
C2
channels are invalid (In RGB+3BLK mode, no pin outputs a signal for
the V
C2
channel. The V
C1
pin is used to output the logical OR of the R, G, and B outputs.).
34

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