S1D15E06 Series
(28) Electronic Volume
This command controls liquid crystal drive voltage VC issued from the built-in liquid crystal power supply voltage
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.
E
RD
R/W
WR
A0
0
D7
1
D6
0
D5
0
D4
0
D3
0
D2
0
D1
0
D0
1
1
1
0
0
Command
Register
1
*
P6
P5
P4
P3
P2
P1
P0
*: denote invalid bits.
• Electronic Volume Register Set
When a 7-bit data to the electronic volume register is set by this command, liquid crystal drive voltage VC assumes one
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.
P6
0
P5
0
P4
0
P3
0
P2
0
P1
0
P0
0
VC
Smaller
0
0
0
0
0
0
1
0
0
0
0
0
1
0
↓
↓
1
1
1
1
1
1
1
1
1
1
1
1
0
1
Larger
*: denote invalid bits.
• Electronic volume register set sequence
Set Electronic Volume Mode
Set Electronic Volume Register
Reset Electronic Volume Mode
Change Completed?
No
Yes
Fig. 7.5
Rev. 2.1
EPSON
41
EPSON [ EPSON COMPANY ]
