
LC74763, 74763M
Display Control Commands
Display control commands are input in an 8-bit serial format. Commands consist of a command identification code in the
first byte and data in the second and following bytes. The following commands are supported.
x COMMAND0:
Display memory (VRAM) write address setting command
COMMAND1:
Display character data write command
z COMMAND2:
Vertical display start position and character size (lines 1 and 2) setting command
COMMAND3:
Horizontal display start position and character size (lines 9 and 11) setting command
COMMAND4:
Display control setting command 1
COMMAND5:
Display control setting command 2
~ COMMAND6:
Display control setting command 3
COMMAND7:
Display control setting command 4
Display Control Command Table
First byte
Second byte
Command
Command identification code
Data
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
COMMAND0
1
0
V3
V2
V1
V0
0
H4
H3
H2
H1
H0
Write address
COMMAND1
1
0
1
0
at2
at1
c7
c6
c5
c4
c3
c2
c1
c0
Character write
COMMAND2
1
0
1
0
SZ
0
VP
Vertical display start position
21
20
11
10
5
4
3
2
1
0
COMMAND3
1
0
1
SZ
0
HP
Horizontal display start position
B1
B0
91
90
5
4
3
2
1
0
COMMAND4
1
0
RST
RAM
OSC
RND
0
I/N
BLK
BK
ATS
0
DSP
Display control 1
1
0
1
COMMAND5
1
0
1
PH
I/E
0
TST
CHAL
BKL
RSL
CVM
XTS
Display control 2
2
1
0
1
0
COMMAND6
1
0
MOD
0
HFI
M30S SMS
IOS
BCL
CB
Display control 3
3
2
1
0
1
0
COMMAND70
1
0
LINS
0
VCOS
LIN
Display control 4
1
5
4
3
2
1
0
COMMAND71
1
0
1
0
LINS
0
EG
PS
VMN
SVIS
VNS
VSS
Display control 5
2
1
COMMAND72
1
0
LINS
0
MOD
Display control 6
3
2
1
0
COMMAND73
1
0
LINS
0
VCOS SOUT VOUT HOUT
Display control 7
2
Once the command identification code in the first bite is written, it is stored internally until the first byte of the following
command is written. However, when the display character data write command (COMMAND1) is written, the system
becomes locked in display character data write mode, and the first byte cannot be overwritten.
When the CS pin is set high the command state is set to COMMAND0, i.e., display memory write address setting mode.
No. 5039-6/19