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MTV021 Revision 5.0 6/29/1999

MTV021

MYSON

TECHNOLOGY

CHS - Define double height character to the respective row.

CWS - Define double width character to the respective row.

3.7 Character ROM

MTV021 character ROM contains 272 built-in characters and symbols including 256 standard fonts and 16

multi-color fonts. The 256 standard fonts are located from address 0 to 255. And the 16 multi-color fonts are

located from address 240 to 255 while CFONT bit is set to “1”. Each character and symbol consists of 12x18

dots matrix. The detail pattern structures for each character and symbols are shown in “CHARACTERS AND

SYMBOLS PATTERN” on page 17.

3.8 Multi-Color Font

The color fonts comprises three different R, G, B fonts. When the code of color font is accessed, the separate

R/G/B dot pattern is output to corresponding R/G/B output. See Figure for the sample displayed color font.

Note: No black color can defined in color font, black window underline the color font can make the dots

become black in color. The detail pattern structures for each character and symbols are shown in “CHARAC-

TERS AND SYMBOLS PATTERN” on page 17.

TABLE 4. The Multi-Color Font Color Selection

3.9 Luminance & border generator

There are 2 shift registers included in the design which can shift out of luminance and border dots to color

encoder. The bordering and shadowing feature is configured in this block. For bordering effect, the character

will be enveloped with blackedge on four sides. For shadowing effect, the character is enveloped with

blackedge for right and bottom sides only.

R

G

B

Background Color

0

0

0

Blue

0

0

1

Green

0

1

0

Cyan

0

1

1

Red

1

0

0

Magent

1

0

1

Yellow

1

1

0

White

1

1

1

R

G

B

Magent

Green

Cyan

Blue

FIGURE 5. Example of Multi-Color Font