M37271MF datasheet(67/98 Pages) RENESAS

67 / 98 page

MITSUBISHI MICROCOMPUTERS

M37271MF-XXXSP

M37271EF-XXXSP, M37271EFSP

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

and ON-SCREEN DISPLAY CONTROLLER

4 Extra font

There are 32 kinds of the extra fonts configured with 16 ! 26 dots in

OSD ROM. 16 kinds of these fonts can be displayed by ORed with

the character font by a character unit (refer to Figure 50). For the

others, only the extra font is displayed (refer to Figure 50). In only the

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

the color code 1, bit 3 of the color code 2, and decode value (EX4) of

the character code. When the character code = “0016” to “13F16,”

EX4 is “0, ” when the character code = “14016,” EX4 is “1.” Since

there is no font with the character code = “14016,” a blank is dis-

played.

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

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

Note : When using the extra font, set bits 7 and 6 of the OSD control

Fig. 70. Structure of extra font color register

(10) Attribute

The attributes (flash, underline, italic) are controlled to the character

font. The attributes for each character are specified by the color codes

1 and 2 (refer to Figure 68). The attributes to be controlled are differ-

ent depending on each mode.

CC mode ..................... Flash, underline, italic

OSD mode .................. Border (all bordered, shadow bordered can

be selected)

EXOSD mode ............. Border (all bordered, shadow bordered can

be selected) , extra font (32 kinds)

1 Under line

The underline is output at the 23th and 24th dots in vertical direction

only in the CC mode. The underline is controlled by bit 6 of the color

code 1. The color of underline is the same color as that of the char-

acter font.

2 Flash

The parts of the character font, the underline, and the character back-

ground are flashed only in the CC mode. The color signals (R, G, B,

OUT1) of the character font and the underline are controlled by bit 5

of the color code 1. All of the color signals for the character font flash.

However, the color signal for the character background can be con-

trolled by bit 3 of the OSD control register (refer to Figure 52). The

flash cycle bases on the VSYNC count.

· VSYNC cycle ! 48 ; 768 ms (at flash ON)

· VSYNC cycle ! 16 ; 256 ms (at flash OFF)

3 Italic

The italic is made by slanting the font stored in OSD ROM only in the

CC mode. The italic is controlled by bit 7 of the color code 1.

The display example of the italic and underline is shown in Figure 70.

In this case, 16 26 dots are used and “R” is displayed.

Notes 1: When setting both the italic and the flash, the italic charac-

ter flashes.

2: When the pre-divide ratio = 1, the italic character with slant

of 1 dot ! 5 steps is displayed (refer to Figure 71 (c)). When

the pre-divide ratio = 2, the italic character with slant of 1/2

dot ! 10 steps is displayed (refer to Figure 71 (d)).

3: The boundary of character color is displayed in italic. How-

ever, the boundary of character background color is not af-

fected by the italic (refer to Figure 72).

4: The adjacent character (one side or both side) to an italic

character is displayed in italic even when the character is

not specified to display in italic (refer to Figure 72).

5: When displaying the italic character in the block with the

pre-divide ratio = 1, set the OSD clock frequency to 11 MHz

to 14 MHz.

Extra font color

(EC : address 021816)

Extra font color

R control bit

0 : No output

1 : Output

Extra font color

G control bit

0 : No output

1 : Output

Extra font color

B control bit

0 : No output

1 : Output

Extra font color

I1 control bit

0 : No output

1 : Output

Extra font color

I2 control bit

0 : No output

1 : Output

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