LC74731 Sanyo Semicon Device, LC74731 Datasheet - Page 22

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

COMMAND52 (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.
DA0 to 7
DA0 to 7
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
MSKERS
EVEBSS
MSKSEL
VNPSEL
VSPSEL
Register
Register
CINSEL
CINCTL
LSPSS
EGL
—
—
—
—
—
—
—
State
State
1
1
0
1
1
0
0
1
0
1
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Command 5 identification code
Display control settings
Extended command 2 identification code
Normal
Always high
Normal
HT12 “on” HT34 “off”
Second byte identification bit
Blank area (the logical OR of the character and outlining signals)
Video signal display area
CV
CV
V signal falling edges detected
V signal rising edges detected
VSEP: About 8.9 µs (NTSC)
VSEP: About 17.8 µs (NTSC)
Mask enabled
Mask disabled
3H (NTSC)
20H (NTSC)
Outlining level 0 only (VBK0)
Two-stage outlining level (VBK0, VBK1)
CR
CR
: off
: on
Content
Content
LC74731W,74732W
Function
Function
Switches the ENBVI signal
LCSTOP control signal
Switches the CV
CV
Switches the V signal acquisition polarity when
external mode/internal V separation is used
Switches the internal vertical separation time
Clears the HSYNC and VSYNC masks
Switches the VSYNC mask
Switches the outlining level (Only valid when BLK0
is 0 and BLK1 is 1.)
CR
on/off switching
CR
on state signal
Notes
Notes
No. 6526-22/38