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LC74775 Datasheet(PDF) 13 Page - Sanyo Semicon Device

Part # LC74775
Description  On-Screen Display Controller IC
PDF  35 Pages
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Manufacturer  SANYO [Sanyo Semicon Device]
Direct Link  https://www.sanyo-av.com/us/
Logo SANYO - Sanyo Semicon Device

LC74775 Datasheet(HTML) 13 Page - Sanyo Semicon Device

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No. 5919-13/35
LC74775, 74775M
DA 0 to 7
Register
Contents
Notes
State
Function
7
–
1
6
–
1
Command 4 identification code.
5
–
0
Display character data write setup.
4
–
0
3
TSTMOD
0
Normal operating mode
This bit must be set to 0
1
Test mode
2
RAMERS
0
Erasing RAM takes about 500 µs. (This operation
1
Erase display RAM.(The RAM data is set to 7F hexadecimal.)
must be executed in the DSPOFF state.)
1
OSCSTP
0
Do not stop the crystal and VCO oscillators
Valid in external synchronization mode when
1
Stop the crystal and VCO oscillators
character display is off
0
The registers are reset when the CS pin is
0
SYSRST
1
Reset all registers and turn display off
low, and the reset state is cleared when CS
is set high.
• First byte
COMMAND4 (Display control setup command)
DA 0 to 7
Register
Contents
Notes
State
Function
7
–
0
Second byte identification bit
6
BLK2
0
Character display area
Specifies the size for complete fill in
1
Video display area
5
BLK1
0
1
Changes the blanking size
4
BLK0
0
1
3
BK1
0
Blinking period: About 0.5 s
Switches the blinking period
1
Blinking period: About 1.0 s
2
BK0
0
Blinking off
1
Blinking on
1
RV
0
Reverse video off
1
Reverse video on
0
DSPON
0
Character display off
1
Character display on
• Second byte
Note: All registers are set to 0 when the LC74775/M is reset by the RST pin.
BLK0
0
1
BLK1
0
Blanking off
Character size
1
Frame size
Complete fill in size
Blinking in character reverse video mode
switches the display between normal
character display and reverse video display



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