M37270MF Datasheet, PDF (63/94 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER

MITSUBISHI MICROCOMPUTERS
M37270MF-XXXSP
M37270EF-XXXSP, M37270EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
(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 65). 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)
ΠUnder 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.
 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 49). The
flash cycle bases on the VSYNC count.
• VSYNC cycle ! 48 ] 800 ms (at flash ON)
• VSYNC cycle ! 16 ] 267 ms (at flash OFF)
Ž 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 67.
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 68 (c)). When
the pre-divide ratio = 2, the italic character with slant of 1/2
dot ! 10 steps is displayed (refer to Figure 68 (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 69).
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 69).
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
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 47). For the
others, only the extra font is displayed (refer to Figure 47). 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
register. When the character font overlaps with the extra font, the
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
register to “0” (refer to Figure 49).
7
0
Extra font color
register
(RC : address 021916)
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
Fig. 67. Structure of extra font color register
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