MITSUBISHI MICROCOMPUTERS
M37270MF-XXXSP
M37270EF-XXXSP, M37270EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
OSD FUNCTIONS
Table 10 outlines the OSD functions of the M37270MF-XXXSP.
The M37270MF-XXXSP incorporates an OSD control circuit of 40
characters ✕ 16 lines. OSD is controlled by the OSD control regis-
ter. There are 3 display modes and they are selected by a block unit.
The display modes are selected by the block control register i (i = 1
to 6).
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)
40 characters ✕ 16 lines
40 characters ✕ 16 lines
16 ✕ 20 dots
40 characters ✕ 16 lines
16 ✕ 26 dots
Number of display
characters
Dot structure
16 ✕ 26 dots
(Character : 20 ✕ 16 dots)
Kinds of characters
320 kinds (In EXOSD mode, they can be combined with 32 kinds of extra fonts)
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 (32 kinds)
Character font coloring
1 screen : 7 kinds, Max. 7 kinds
(a character unit)
1 screen : 7 kinds, Max. 15 kinds
(a character unit)
1 screen : 7 kinds, Max. 7 kinds
(a character unit)
Raster coloring
Possible (a screen unit, 1 screen : Possible (a screen unit, 1 screen : Possible (a screen unit, 1 screen :
7 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. 7 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, I1, OUT1, OUT2
R, G, B, I1, I2, 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 ]
