
110
MITSUBISHI MICROCOMPUTERS
M37207MF-XXXSP/FP, M37207M8-XXXSP
M37207EFSP/FP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
and ON-SCREEN DISPLAY CONTROLLER
CRT Port Control Register
Display Block Counter
Address 00EB
16
Address 00EC
16
b7 b6 b5 b4 b3 b2 b1 b0
Display block counter (CBC) [Address 00EB
16
]
B
Name
Functions
After reset
R W
Display Block Counter
0
to
3
Number of blocks which are being displayed or has
displayed
(Incremented each time a block is displayed)
Indeterminate
R W
0
Nothing is assigned. These bits are write disable bits.
When these bits are read out, the values are “0.”
R —
4
to
7
b7 b6 b5 b4 b3 b2 b1 b0
CRT port control register (CRTP) [Address 00EC
16
]
B
Name
Functions
After reset
R W
CRT Port Control Register
0
H
SYNC
input polarity
switch bit (HSYC)
0 : Positive polarity
1 : Negative polarity
0
1
0 : Positive polarity
1 : Negative polarity
0
2
R, G, B output polarity
switch bit (R/G/B)
0 : Positive polarity
1 : Negative polarity
0
3
I output polarity switch bit
(I)
0 : Positive polarity
1 : Negative polarity
0
4
OUT output polarity
switch bit (OUT)
0 : Positive polarity
1 : Negative polarity
0
5
R signal output switch bit
(R)
0 : R signal output
1 : MUTE signal output
0
6
G signal output switch bit
(G)
0 : G signal output
1 : MUTE signal output
0
7
B signal output switch bit
(B)
0 : B signal output
1 : MUTE signal output
0
V
SYNC
input polarity
switch bit (VSYC)
R W
R W
R W
R W
R W
R W
R W
R W