No. 7191-40/50
LC74735W
Command 71 (Color table data write setting command)
First byte
DA0 to 7
Register
Content
Notes
State
Function
7
—
1
6
—
1
Command 7 identification code
5
—
1
Display character data write setting
4
—
1
3
—
0
Sub-identifier code 1
2
—
1
1
—
0
0
0
RM3
1
Second byte (1)
When this command has been issued, the IC
remains in display character data write mode until
the CS pin is set high.
RM3
0
1
Mode
[1][2]
[1][2]
End
Continuous
Continuous write mode selection
DA0 to 7
Register
Content
Notes
State
Function
7
—
0
6
—
0
5
—
0
4
—
0
3
TOK
0
Color
1
Transparent (BLK output: low)
2
TB2
0
1
1
TB1
0
1
0
TB0
0
1
Color table
B output
000 to 111
0 to 7 (hexadecimal)
Color table setting B
Second byte (2)
DA0 to 7
Register
Content
Notes
State
Function
7
—
0
6
—
0
5
TG2
0
1
4
TG1
0
1
3
TG0
0
1
2
TR2
0
1
1
TR1
0
1
0
TR0
0
1
Color table
G output
000 to 111
0 to 7 (hexadecimal)
Color table setting G
Color table
R output
000 to 111
0 to 7 (hexadecimal)
Color table setting R
*
: This register is set to the all bits zero state when the IC is reset by the RST pin.
When transparent is selected, the BLK output is set to the low level. (Transparent state)
The RGB outputs are values from the color table.
The transparent specification is best for color table 1, address 0000.
Since the data is set to all zeros by a RAM clear operation,
The RGB output will be 000 (black) and the BLK output will be 1.
Transparent is specified by setting the TOK bit to 1. (The BLK output will go to the low level.)