
90
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
M37281MAH–XXXSP,M37281MFH–XXXSP
M37281MKH–XXXSP,M37281EKSP
MITSUBISHI MICROCOMPUTERS
Rev. 1.0
Fig. 8.11.23 Structure of OSD RAM
Bit
RF0
RF1
RF2
RF3
RF4
RF5
RF6
RF7
RC10
RC11
RC12
RC13
RC14
RC15
RC16
RC17
RC20
RC21
Bit name
Function
Specify
character code
in OSD ROM
(See note 3)
Bit name
Function
Specify
character code in
OSD ROM
(See note 3)
Bit name
Function
Specify
character code
in OSD ROM
(color dot)
(See note 4)
OSD mode
CDOSD mode
Notes 1: Read value of bits 2 to 7 of the color code 2 is undefined.
2: For “not used” bits, the write value is read.
3: Do not use character code “0FF16,” “10016.”
4: Do not use character code “1F16,” “2016.”
5: Refer to Figure 8.11.24.
6: Only CDOSD mode, a dot which selects color pallet 0 or 8 is colored to the color pallet set by RC13 to RC16 of OSD RAM
in character units.
CC mode
Character code
(Low-order 8
bits)
Character code
(Low-order 8 bits)
Character code
(High-order 1 bits)
Color pallet
selection bit 0
Color pallet
selection bit 1
Color pallet
selection bit 2
Italic control
Flash control
Underline control
OUT2 output
control
Color pallet
selection bit 0
Color pallet
selection bit 1
Specify color
pallet for character
(See note 5)
0: Italic OFF
1: Italic ON
0: Flash OFF
1: Flash ON
0: Underline OFF
1: Underline ON
0: OUT2 output OFF
1: OUT2 output ON
Character code
(High-order 1 bits)
Color pallet
selection bit
Color pallet
selection bit
Color pallet
selection bit
Color pallet
selection bit 3
Color pallet
selection bit 0
Color pallet
selection bit 1
Specify color pallet
for background
(See note 5)
Specify color
pallet for character
(See note 5)
Specify color pallet
for background
(See note 5)
0: OUT2 output OFF
1: OUT2 output ON
CD code
(6 bits)
Not used
OUT2 output
control
Not used
0: OUT2 output OFF
1: OUT2 output ON
Blocks 1 to 16
RF6
RF5 RF4
RF3
RF2
RF1 RF0 RC17 RC16 RC15 RC14 RC13 RC12 RC11 RC10
RF7
b0
b7
b0
b7
Color code 1
Character code
Color code 2
b0
RC21 RC20
b1
Character
background
Character
background
Character
background
Color pallet
selection bit 0
Color pallet
selection bit 1
Color pallet
selection bit 2
Color pallet
selection bit 3
Specify a dot
which selects
color pallet 0 or 8
by OSD ROM
(See note 6)
Dot
color
Specify color pallet
for background
(See note 5)
Color pallet
selection bit 2
Color pallet
selection bit 3
OUT2 output
control