M37274EFSP datasheet(90/148 Pages) RENESAS

90 / 148 page

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER

and ON-SCREEN DISPLAY CONTROLLER

M37274EFSP

PRELIMINARY

Notice:

This

is not

a final

specification.

Some

paramentic

limits

are

subject

to change.

MITSUBISHI MICROCOMPUTERS

Extra font

There are 16 kinds of the extra fonts configured with 16 ! 26 dots in

OSD ROM. This 16 kinds fonts can be displayed by ORed with the

character font by a character unit (refer to Figure 62). In only the

EXOSD mode, the extra font is controlled the following : bits 7 to 5 of

the color code 1 and bit 3 of the color code 2.

The extra font color for each screen is specified by the extra color

color of the area becomes the ORed color of both fonts.

Fig. 86. Extra Font Color Register

Fig. 87. Display Example of Only Extra Font

16 dots

(OR)

Extra font specified by EX0 to EX3

Blank character font

b7 b6 b5 b4 b3 b2 b1 b0

Extra font color register (EC) [Address 021916]

After reset

Extra Font Color Register

3, 4

Name

Functions

Extra font color G

control bit (EC1)

Fix these bits to “0.”

0 : No output

1 : Output

R —

Extra font color R

control bit (EC0)

0 : No output

1 : Output

Extra font color B

control bit (EC2)

0 : No output

1 : Output

0R W

Nothing is assigned. These bits are write disable bits.

When these bits are read out, the values are “0.”

Notes 1 : When using the extra font, set bits 7 and 6 of the OSD

control register to “0” (refer to Figure 64).

2 : Extra fonts are always displayed by ORed with the char-

acter font. Accordingly, when displaying only a extra font,

set a blank for a character font and OR with it.

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