LC74780(2001) データシートの表示（PDF） - SANYO -> Panasonic
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LC74780 Datasheet PDF : 14 Pages
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LC74780, 74780M
COMMAND3: second byte
DA0 to
DA7
0
1
2
3
4
5
Register name
HP0 (LSB)
HP1
HP2
HP3
HP4
HP5 (MSB)
Status
0
1
0
1
0
1
0
1
0
1
0
1
Register Contents
Function
The initial horizontal coordinate position is given by
where TC is the OSCIN and OSCOUT operation mode oscilation
period
0
LC oscillator dot clock
6
LC
1
Crystal oscillator dot clock
7
0
Second byte identification bit
Note
On system reset with RST, the status of all registers is set to 0.
COMMAND4: Display Control Setting Command
COMMAND4: first byte
DA0 to
DA7
0
1
2
3
4
5
6
7
Register name
SYSRST
OSCSTP
RAMERS
TSTMOD
Status
0
1
0
1
0
1
0
1
0
0
1
1
Register Contents
Function
Resets all registers and turns the display OFF
Crystal and LC oscillator stop disable
Crystal and LC oscillator circuitry stop enable
Erases display RAM (set to 7FH)
Normal operating mode
Test mode
COMMAND4 identification code
COMMAND4: second byte
DA0 to
DA7
0
1
Register name
DSPON
RV
Status
0
1
0
1
Register Contents
Function
Character display OFF
Character display ON
Reverse characters OFF
Reverse characters ON
0
Blinking OFF
2
BK0
1
Blinking ON
0
Blinking period approximately 0.5 s
3
BK1
1
Blinking period approximately 1.0 s
0
4
BLK0
BLK1
BLK0
1
0
0
0
5
BLK1
1
0
1
1
0
1
1
Blanking select
Blanking OFF
Character size
Border size
Full size
0
Character display
6
BLK2
1
Video display
7
0
Second byte identification bit
Note
On system reset with RST, the status of all registers is set to 0.
Remarks
The initial horizontal coordinate
position is set in 6 bits, HP0 to
HP5, where the LSB, HP0,
corresponds to 2TC
Selects the dot clock used for the
character display transverse
direction
Remarks
A system reset also occurs when
CS goes LOW
External sync mode character
display
Approximately 500 µs are required
to erase RAM (with display OFF)
Test mode should not be selected
during normal operation
Remarks
When blinking inverse characters,
characters alternate between
normal and inverse
Selects blinking period
Selects the blanking area size
Full size selection
No.4490–9/14
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