LC74725 データシートの表示（PDF） - SANYO -> Panasonic
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LC74725 Datasheet PDF : 16 Pages
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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
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
Set write address
1
0
0
0 V3 V2 V1 V0 0
0
0 H4 H3 H2 H1 H0
COMMAND1
Write character
1
0
0
1
0
0
0
0
at 0 c5 c4 c3 c2 c1 c0
COMMAND2
Set vertical display start position and 1
0
1
0
0 VS 0 VS 0 FS VP VP VP VP VP VP
vertical character size
20
10
5
4
3
2
1
0
COMMAND3
Set horizontal display start position
1
0
1
1 EGP HS 0 HS 0 LC HP HP HP HP HP HP
and horizontal character size
20
10
5
4
3
2
1
0
COMMAND4
Display control
1
1
0
0 TST RAM OSC SYS 0 EGL NON EG BK BK RV DSP
MOD ERS STP RST
1
0
ON
COMMAND5
Synchronizing signal control
1
1
0
1 BCL PH RSN INT 0
0
0 MUT MOD CTL CTL SEL
0
3
2
0
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
DA0 to DA7
7
6
5
4
3
2
1
0
Register name
—
—
—
—
V3
V2
V1
V0
State
1
0
0
0
0
1
0
1
0
1
0
1
Register content
Function
Command 0 identification code
Set the display memory write address.
Display memory row address (0 to 9 hexadecimal)
Note
No. 5213-8/16
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