LC74731 Sanyo Semicon Device, LC74731 Datasheet - Page 23

• Manufacturer Part Number: LC74731
• Description: On-Screen Display Controller
• Manufacturer: Sanyo Semicon Device

COMMAND53 (Display control setup command)
• First byte
• Second byte
Note that all registers are set to 0 when these ICs are reset by the RST pin.
SYnin: CVIDEO (Built-in sync separator circuit)
SEPin: None (internal vertical separation)
SYNin: HD
SEPin: CSYNC (internal vertical separation)
DA0 to 7
DA0 to 7
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
:VSYNC
or
Register
Register
SP0SEL
PALAL4
RDLG0
RSLG1
VSSEL
HSSEL
IHSEL
CTL3
—
—
—
—
—
—
—
—
State
State
1
1
0
1
1
1
0
1
0
1
0
0
0
1
0
1
0
1
0
1
0
1
0
1
Command 5 identification code
Display control settings
Extended command 3 identification code
RSLG1 RSLG0
Second byte identification bit
Internal vertical separation circuit
External input
CSYNC (sync separator output)
Halftone output
Normal
Always use 4 fsc timing (PAL)
SYNin pin input signal
SEPin pin input signal
Negative polarity
Positive polarity
Negative polarity
Positive polarity
0
0
1
0
1
0
NO1
NO2
NO3
Content
Content
LC74731W,74732W
Function
Function
RS1
RS2
RS3
SYNin: HSYNC
SEPin: VSYNC
SYNin: CSYNC (internal vertical separation)
SEPin: None
Switches the screen background color level
Switches the VSYNC signal input
Switches the SEPout pin output
Switches the internal vertical separation input
signal
Switches the SEPin input polarity
Switches the SYNin input polarity (Invalid for
CVIDEO input)
Notes
Notes
No. 6526-23/38