UPD6461GS datasheet(34/60 Pages) NEC

34 / 60 page

µPD6461, 6462

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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.

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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.

Minimum background: Adds a background of an area that is wider than the character display area by a minimum

of one dot at each side.

Overall background:

Adds a background over the entire screen.

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Background and rimming in RGB+VC1+VC2 mode

Characters for which the VC2 channel is specified with the displayed character control command are not output to

the RGB or VC1 channel. When background (minimum/overall) is specified for the RGB or VC1 channel, no background

is added to the areas for the VC2-specified characters. By contrast for the VC2 channel, a background is added only

to those areas for VC2-specified characters. (Refer to 1.4 DISPLAY IN RGB+VC1+VC2 MODE and 1.4.4 Display of

VC2-Specified Characters for details of the display of VC2-specified character areas for the RGB or VC1 channel.)

When RGB+3BLK (RGB compatible blanking) mode is selected, only the background control bits for the RGB

channel are valid. Those for the VC1 and VC2 channels are invalid (In RGB+3BLK mode, no pin outputs a signal for

the VC2 channel. The VC1 pin is used to output the logical OR of the R, G, and B outputs.).

UPD6461GS Datasheet(PDF) 34 Page - NEC