MITSUBISHI MICROCOMPUTERS
M37274EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Note : Note that MASK version has 36 characters ✕ 12 lines when
OSD FUNCTIONS
programming.
Table 10 outlines the OSD functions of the M37274EFSP.
The M37274EFSP incorporates an OSD circuit of 40 characters ✕
16 lines. OSD is controlled by the OSD control register. There are 3
display modes and they are selected by a block unit. The display
modes are selected by block control register i (i = 1 to 16).
The features of each mode are described below.
Table 10. Features of Each Display Mode
Display Mode
Parameter
CC Mode
OSD Mode
EXOSD Mode
(Closed caption mode)
(On-screen display mode)
(Extra on-screen display mode)
Number of display
characters
40 characters ✕ 16 lines
Character display area
16 ✕ 26 dots
(character dot structure : 20 ✕ 16 dots)
256 kinds (In EXOSD mode, they can be combined with 16 kinds of extra fonts)
16 ✕ 20 dots
16 ✕ 26 dots
Kinds of characters
Kinds of character sizes
2 kinds
14 kinds
6 kinds
✕ 1, ✕ 2
✕ 1, ✕ 2, ✕ 3
✕ 1, ✕ 2, ✕ 3
Pre-divide
ratio (Note)
Dot size
1TC ✕ 1/2H
1TC
✕
✕
1/2H, 1TC
1H, 2TC
✕
✕
1H, 1.5TC 1/2H,
✕
1TC ✕ 1/2H, 1TC ✕ 1H
1.5TC
2H, 3TC ✕ 3H
Attribute
Smooth italic, under line, flash
Border
Border, extra font (16 kinds)
Character font coloring
1 screen : 7 kinds, Max. 7 kinds
(a character unit)
1 screen : 7 kinds, Max. 7 kinds (a 1 screen : 5 kinds, Max. 5 kinds
character unit) (a character unit)
Raster coloring
Possible (a screen unit, 1 screen : 7 Possible (a screen unit, 1 screen : Possible (a screen unit, 1 screen :
kinds, max. 7 kinds)
7 kinds, max. 7 kinds) 7 kinds, max. 7 kinds)
Character background
coloring
Possible (a character unit, 1 screen Possible (a character unit, 1 screen Possible (a character unit, 1 screen :
: 7 kinds, max. 7 kinds)
: 7 kinds, max. 7 kinds)
7 kinds, max. 5 kinds)
Border coloring
Possible (a screen unit, 1 screen : Possible (a screen unit, 1 screen :
7 kinds, max. 7 kinds)
7 kinds, max. 7 kinds)
Extra font coloring
Possible (a screen unit, 1 screen :
7 kinds, max. 7 kinds)
OSD output
Function
R, G, B, OUT1, OUT2
Auto solid space function
Window function
R, G, B, OUT1, OUT2
R, G, B, OUT1, OUT2
Dual layer OSD function (layer 2)
Dual layer OSD function (layer 1)
Possible
Display expansion
(multiline display)
Possible
Possible
Notes 1: The divide ratio of the frequency divider (the pre-divide circuit) is referred as “pre-divide ratio” hereafter.
2: The character size is specified with dot size and pre-divide ratio (refer to (3) Dote size).
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RENESAS [ RENESAS TECHNOLOGY CORP ]
