M37274EFSP datasheet(91/148 Pages) RENESAS

91 / 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

Border

The border is output in the OSD mode and the EXOSD mode. The all

bordered (bordering around of character font) and the shadow bor-

dered (bordering right and bottom sides of character font) are se-

lected (refer to Figure 88) by bit 2 of the OSD control register (refer to

Figure 64). The border ON/OFF is controlled by bit 2 of the block

control register (refer to Figure 65).

The OUT1 signal is used for border output. The border color for each

screen is specified by the border color register.

The horizontal size (x) of border is 1TC (OSD clock cycle divided in

the pre-divide circuit) regardless of the character font dot size. How-

ever, only when the pre-divide ratio = 2 and character size = 1.5TC,

the horizontal size is 1.5TC. The vertical size (y) different depending

on the screen scan mode and the vertical dot size of character font.

Notes 1 : There is no border for the extra font.

2 : The border dot area is the shaded area as shown in Figure

90. In the EXOSD mode, top and bottom of character font

display area is not bordered.

3 : When the border dot overlaps on the next character

font, the character font has priority (refer to Figure 91 A).

When the border dot overlaps on the next character back

ground, the border has priority (refer to Figure 91 B).

4 : The border is not displayed at right side of the most right

dot in the display area of the 40th character (the character

located at the most right of the block).

However, note that MASK version cannot display the bor-

der for the right edge dots of the 36th’s character area.

Fig. 88. Example of Border Display

Fig. 89. Horizontal and Vertical Size of Border

All bordered

Shadow bordered

1/2H

Vertical dot size of

character font

Border

dot size

Scan mode

Horizontal size (x)

Vertical size (y)

1TC (OSD clock cycle divided in pre-divide circuit)

1.5TC when selecting 1.5TC for character size.

Normal scan mode

Bi-scan mode

1/2H

1H, 2H, 3H

1/2H, 1H, 2H, 3H

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