S1D12200 Epson Electronics America, Inc., S1D12200 Datasheet - Page 240

• Manufacturer Part Number: S1D12200
• Description: S1d12000 Series Lcd Driver Ic Technical Manual Technical Manual
• Manufacturer: Epson Electronics America, Inc.

S1D12400 Series
Electronic Volume RAM
The S1D12400 series is provided with an electronic
volume function that permits controlling the liquid crystal
drive voltage V
crystal display. The electronic volume function can
select one of 32 states of the liquid crystal drive voltage
by writing 5-bit data into the electronic volume RAM.
6–52
Note
Function
Electronic
volume
: Unused
: = V
: Address "09H" (RE = 0) is used for test. Don't use it.
REG
5
/150
and adjusting the density of liquid
RAM address
[RE = 0]
08H
09H
D7
D6
EPSON
Electronic volume data
D5 D4 D3
When a V
this function can attain a wider adjustment if the resistor
ratio set command is used together.
The relation between electronic volume set RAM
addresses and write data is shown below.
1
1
1
0
0
0
T4
0
0
0
1
1
1
5
D2
T2
voltage regulating built-in resistor is used,
0
0
0
1
1
1
D1
T1 T0
0
0
1
0
1
1
D0
0
1
0
1
0
1
State
29
30
31
0
1
2
–
V
V
V
V
For test
V
V
REG–29
REG–30
REG–31
REG–2
REG–0
REG–
V
EV
Rev. 2.1