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125
MITSUBISHI MICROCOMPUTERS
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
M37274MA-XXXSP
PRELIMINARY
Notice:
This
is not
a final
specification.
Some
paramentic
limits
are
subject
to change.
Raster Color Register
I/O Polarity Control Register
Address 021716
Address 021816
b7 b6 b5 b4 b3 b2 b1 b0
I/O polarity control register (PC) [Address 0217 16]
B
Name
Functions
After reset R W
I/O Polarity Control Register
0HSYNC input polarity
switch bit (PC0)
0 : Positive polarity input
1 : Negative polarity input
0
1
0 : Positive polarity input
1 : Negative polarity input
0
2
R, G, B output polarity
switch bit (PC2)
0 : Positive polarity output
1 : Negative polarity output
0
3
0
VSYNC input polarity
switch bit (PC1)
RW
R—
Note: Refer to the corresponding figure (P62).
0 : “
” at even field
“
” at odd field
1 : “
” at even field
“
” at odd field
4
OUT1 output polarity
switch bit (PC4)
0 : Positive polarity output
1 : Negative polarity output
0
5
OUT2 output polarity
switch bit (PC5)
0 : Positive polarity output
1 : Negative polarity output
0
6
Display dot line selection
bit (PC6) (See note)
0
7
Field determination flag
(PC7)
0 : Even field
1 : Odd field
1
RW
R—
Nothing is assigned. Ths bit is a write disable bit.
When this bit is read out, the value is “0.”
b7 b6 b5 b4 b3 b2 b1 b0
Raster color register (RC) [Address 0218 16]
B
Name
Functions
After reset R W
Raster Color Register
0
Raster color R
control bit (RC0)
0 : No output
1 : Output
0
1
Raster color G
control bit (RC1)
0 : No output
1 : Output
0
2
0 : No output
1 : Output
0
Raster color B
control bit (RC2)
RW
3, 4
0
6
Raster color OUT2
control bit (RC6)
0
RW
5
0 : No output
1 : Output
Raster color OUT1
control bit (RC5)
0 : No output
1 : Output
7
0R —
0R W
00
OSD interrupt source
selection bit (RC7)
0 : Interrupt occurs at end of
OSD or EXOSD block
display
1 : Interrupt occurs at end of
CC mode block display
Nothing is assigned. These bits are write disable bits.
When these bits are read out, the values are “0.”