MITSUBISHI MICROCOMPUTERS
M37274EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
OSD Control Register
b7 b6 b5b4 b3 b2b1 b0
OSD control register (OC) [Address 00CE16
]
Functions
Name
After reset R
W
B
0
0 : All-blocks display off
1 : All-blocks display on
0
R W
R W
R W
R W
OSD control bit
(OC0) (See note 1)
Scan mode selection 0 : Normal scnan mode
0
0
0
1
2
3
1 : Bi-scan mode
bit (OC1)
Border type selection
bit (OC2)
0 : All bordered
1 : Shadow bordered (See note 2)
Flash mode selection
bit (OC3)
0 : Color signal of character background
part does not flash
1 : Color signal of character background
part flashes
4
5
Automatic solid space
control bit (OC4)
0
0
R W
R W
0 : OFF
1 : ON
Window control bit
(OC5)
0 : OFF
1 : ON
b7 b6
6, 7 Layer mixing control
bits (OC6, OC7)
(See note 3)
0
R W
0 0: Logic sum (OR) of layer 1’s
color and layer 2’s color
0 1: Layer 1’s color has priority
1 0: Layer 2’s color has priority
1 1: Do not set.
Notes 1 : Even this bit is switched during display, the display screen
remains unchanged until a rising (falling) of the next V SYNC
.
2 : Shadow border is output at right and bottom side of the font.
3 : Set “00” during displaying extra fonts.
OSD Control Register
Address 00CE16
Horizontal Position Register
b7 b6 b5b4 b3 b2b1 b0
Horizontal position register (HP) [Address 00CF16]
B
Name
Functions
After reset R W
Horizontal display start positions
0
to
7
Control bits of horizontal
display start positions
(HP0 to HP7)
0
R W
4TOSC
✕
1
(
setting value of high-order 4 bits
✕
16
0
+
setting value of low-order 4 bits
✕
16 )
Notes 1. The setting value synchronizes with the V SYNC.
2. TOSC = OSD oscillation period.
Horizontal Position Register
Address 00CF16
123
RENESAS [ RENESAS TECHNOLOGY CORP ]
