S1D15714 Epson Company, S1D15714 Datasheet - Page 39

• Manufacturer Part Number: S1D15714
• Description: a single chip MLS driver
• Manufacturer: Epson Company

S1D15714 Series
(22) Electronic Volume
This command controls liquid crystal drive voltage V
regulating circuit, and adjusts the liquid crystal display density. For details, see the description of “6.6.2 Voltage
Regulating Circuit” in the Function Description.
• Electronic Volume Mode Set
Inputting this command makes the Electronic Volume Register Set Command valid. Once the Electronic Volume Mode
Set Command is input, any command other than the Electronic Volume Register Set Command cannot be used. After
data are saved in the register by the Electronic Volume Register Set Command, this command is released.
• Electronic Volume Register Set
When a 7-bit data to the electronic volume register is set by this command, liquid crystal drive voltage V
state out of voltage values in 128 states.
After this command is input, and the electronic volume register is set, the electronic volume mode is reset.
• Electronic volume register set sequence
36
A0
0
0
RD
E
1
1
R/W
WR
0
0
D7
R7
R7
1
*
*
*
*
*
D6
R6
R6
0
0
0
0
1
1
D5
R5
R5
No
0
0
0
0
1
1
Set Electronic Volume Register
Set Electronic Volume Mode
Change Completed?
D4
R4
R4
0
0
0
0
1
1
EPSON
Fig. 7.5
3
issued from the built-in liquid crystal power supply voltage
D3
R3
R3
0
0
0
0
1
1
Yes
Reset Electronic Volume Mode
D2
R2
R2
0
0
0
0
1
1
D1
R1
R1
0
0
0
1
1
1
D0
R0
R0
1
0
1
0
0
1
*: denote invalid bits.
Mode set
Register
Smaller
Larger
V
C
3
assumes one
Rev. 1.0