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LC74725 Datenblatt(PDF) 8 Page - Sanyo Semicon Device

Teilenummer LC74725
Bauteilbeschribung  On-Screen Display Controller LSI
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Hersteller  SANYO [Sanyo Semicon Device]
Direct Link  https://www.sanyo-av.com/us/
Logo SANYO - Sanyo Semicon Device

LC74725 Datenblatt(HTML) 8 Page - Sanyo Semicon Device

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LC74725, 74725M
Display Control Commands
Display control commands have an 8-bit format and are transferred using the serial input function. Commands consist of
a command identification code in the first byte and command data in the following bytes. The following commands are
supported.
x COMMAND0: Display memory (VRAM) write address setup command
y COMMAND1: Display character data write command
z COMMAND2: Vertical display start position and vertical character size setup command
{ COMMAND3: Horizontal display start position and horizontal character size setup command
| COMMAND4: Display control setup command
} COMMAND5: Display control setup command
Display Control Command Table
Once written, the command identification code in the first byte is stored until the next first byte is written. However,
when the display character data write command (COMMAND1) is written, the LC74725/M locks into the display
character data write mode, and another first byte cannot be written.
When a high level is input to the CS pin, the LC74725/M is set to COMMAND0 (display memory write address setup
mode).
x COMMAND0 (Display memory write address setup command)
First byte
First byte
Second byte
Command
Command identification code
Data
Data
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
COMMAND0
1
0
0
0
V3
V2
V1
V0
0
0
0
H4
H3
H2
H1
H0
Set write address
COMMAND1
1
0
0
1
0
0
0
0
at
0
c5
c4
c3
c2
c1
c0
Write character
COMMAND2
1
0
1
0
0
VS
0
VS
0
FS
VP
VP
VP
VP
VP
VP
Set vertical display start position and
20
10
5
4
3
2
1
0
vertical character size
COMMAND3
1
0
1
1
EGP
HS
0
HS
0
LC
HP
HP
HP
HP
HP
HP
Set horizontal display start position
20
10
5
4
3
2
1
0
and horizontal character size
COMMAND4
1
1
0
0
TST
RAM
OSC
SYS
0
EGL
NON
EG
BK
BK
RV
DSP
Display control
MOD
ERS
STP
RST
1
0
ON
COMMAND5
1
1
0
1
BCL
PH
RSN
INT
0
0
0
MUT
MOD
CTL
CTL
SEL
Synchronizing signal control
0
3
2
0
Register content
DA0 to DA7
Register name
State
Function
Note
7
1
6
0
Command 0 identification code
5
0
Set the display memory write address.
4
0
3
V3
0
1
2
V2
0
1
Display memory row address (0 to 9 hexadecimal)
1
V1
0
1
0
V0
0
1


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