LC74721 Просмотр технического описания (PDF) - SANYO -> Panasonic
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LC74721 Datasheet PDF : 12 Pages
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LC74721, 74721M
COMMAND3: second byte
DA0 to
DA7
Register name
Status
Register Contents
Function
0
0
HP0
1
0
1
HP1
1
The initial horizontal coordinate position is given by
0
2
HP2
1
0
3
HP3
1
where TC is the OSCIN and OSCOUT operation mode oscillation
0
period
4
HP4
1
0
5
HP5
1
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
CB
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
Color burst signal is output
Color burst signal is not output
Normal operating mode
Test mode
COMMAND4 identification code
COMMAND4: second byte
DA0 to
DA7
Register name
Status
Register Contents
Function
0
Character display OFF
0
DSPON
1
Character display ON
0
Inverse characters OFF
1
RV
1
Inverse characters ON
0
Blinking OFF
2
BK0
1
Blinking ON
0
Blinking period 0.5 s
3
BK1
1
Blinking period 1.0 s
0
Border OFF
4
EG
1
Border ON
0
Interlaced scanning, 262.5 H/field
5
NON
1
Non-interlaced scanning, 263 H/field
6
0
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
When BCL is HIGH only
Test mode should not be selected
during normal operation
Remarks
When blinking inverse characters,
characters alternate between
normal and inverse
Selects blinking period
Interlaced/non-interlaced
switching
No.4359–9/12
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