lc74776m Sanyo Semiconductor Corporation, lc74776m Datasheet - Page 13

• Manufacturer Part Number: lc74776m
• Description: Vps/pdc Video On-screen Display
• Manufacturer: Sanyo Semiconductor Corporation

COMMAND4 (Display control setup command)
• First byte
• Second byte
Note: All registers are set to 0 when the LC74776/M is reset by the RST pin.
DA 0 to 7
DA 0 to 7
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
TSTMOD
RAMERS
OSCSTP
SYSRST
Register
Register
DSPON
BLK2
BLK1
BLK0
BK1
BK0
RV
–
–
–
–
–
State
State
1
1
0
0
0
1
0
1
0
1
0
1
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Command 4 identification code.
Display character data write setup.
Normal operating mode
Test mode
Erase display RAM.(The RAM data is set to FF hexadecimal.)
Do not stop the crystal and LC oscillators
Stop the crystal and LC oscillators
Reset all registers and turn display off
Second byte identification bit
Character display area
Video display area
Blinking period: About 0.5 s
Blinking period: About 1.0 s
Blinking off
Blinking on
Reverse video off
Reverse video on
Character display off
Character display on
BLK1
0
1
BLK0
LC74776, 74776M
Blanking off
Frame size
Contents
Contents
Function
Function
0
Complete fill in size
Character size
1
Blinking in character reverse video mode
switches the display between normal
character display and reverse video display
This bit must be set to 0
Erasing RAM takes about 500 µs. (This operation
must be executed in the DSPOFF state.)
Valid in external synchronization mode when
character display is off
The registers are reset when the CS pin is
low, and the reset state is cleared when CS
is set high.
Specifies the size for complete fill in
Changes the blanking size
Switches the blinking period
Notes
Notes
No. 6018-13/35