LC74775 データシートの表示（PDF） - SANYO -> Panasonic
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LC74775 Datasheet PDF : 35 Pages
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LC74775, 74775M
COMMAND4 (Display control setup command)
• First byte
DA 0 to 7
7
6
5
4
3
2
1
0
Register
–
–
–
–
TSTMOD
RAMERS
OSCSTP
SYSRST
State
1
1
0
0
0
1
0
1
0
1
0
1
Contents
Function
Notes
Command 4 identification code.
Display character data write setup.
Normal operating mode
Test mode
This bit must be set to 0
Erase display RAM.(The RAM data is set to 7F hexadecimal.)
Do not stop the crystal and VCO oscillators
Stop the crystal and VCO oscillators
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
Reset all registers and turn display off
The registers are reset when the CS pin is
low, and the reset state is cleared when CS
is set high.
• Second byte
DA 0 to 7
7
6
5
4
3
2
1
0
Register
–
BLK2
BLK1
BLK0
BK1
BK0
RV
DSPON
State
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Contents
Function
Second byte identification bit
Character display area
Video display area
BLK0
BLK1
0
1
0
Blanking off
Frame size
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
Note: All registers are set to 0 when the LC74775/M is reset by the RST pin.
Notes
Specifies the size for complete fill in
1
Character size
Complete fill in size
Changes the blanking size
Switches the blinking period
Blinking in character reverse video mode
switches the display between normal
character display and reverse video display
No. 5919-13/35
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