S1D15715 Epson Electronics America, Inc., S1D15715 Datasheet - Page 33

• Manufacturer Part Number: S1D15715
• Description: Liquid Crystal Display =lcd Driver
• Manufacturer: Epson Electronics America, Inc.

<Setting example: When setting Ta=25°C and V
α=15 and V
Table 15 lists the command used, and Table 17 lists V
the electronic volume.
6.6.3 Liquid crystal voltage generator circuit
The V
driving liquid crystals.
Then, V
liquid crystal drive circuit.
Using the command, either 1/5 bias or 1/6 bias can be selected as bias ratio.
6.6.4 On-chip power supply turn OFF command sequence
To turn the built-in power supply off, it is recommended that the following command sequence be observed to
set the system in the power save state beforehand so that the residual power is discharged from the LCD panel,
power supply pins and others.
You can also turn the built-in power supply off by initializing it using
LOW Level is input to the
due to discharge.
Rev.1.0
When using the V
regulator circuit and the voltage follower circuit must be activated, as a minimum requirement, by the power
control set command. When the booster circuit is turned off, necessary voltage must be supplied from
V
V
open when these resistors are used.
including cutting the wiring distance shorter or using shielded wire.
Since VR pin has a higher input impedance, appropriate noise protection measures must be provided
Sequence
Step1
Step2
End
OUT
R
[ ]: Commands selected from the electronic volume.
Variable range
Pitch width
pin is enabled only when the V
0
voltage is divided by resistor-split within an IC and generates V
.
1
, V
2
REG
, V
V
0
3
(command and state)
= 1.2V when intermediate resistor values (D4, D3, D2, D1, D0) = (1, 0, 0, 0, 0) are selected
Display all points on
and V
Built-in power OFF
Keep this in mind when using an external power supply.
0
Display OFF
from the electronic volume.
Thus, using expression C-1, you can select V
9V={1+(R3+R2)/R1}･(1-15/200)･1.2
R3+R2=7.11・R1
If you select 5µA for the current to be conducted across V
value), sum of resistance of R1, R2 and R3 can be derived as shown below:
R1+R2+R3＝1.4MΩ
From expressions C-2 and C-3, R1＝1.4MΩ/8.11＝173kΩ
And, you can select V=5V when ∆R2=R2 through the following computation:
5V={1+R3/(R1+R2)}･(1-15/200)･1.2
R3/(R1+R2)=3.5
R2＝137kΩ, R3＝1.09MΩ are derived from expressions C-2, C-3 and C-4.
Contents
voltage regulator internal resistor or the electronic volume function, both of the voltage
4
potentials are impedance-converted by the voltage follower circuit and supplied to the
↓
↓
____
RES Pin, short-circuit occurs between V
6.39[80H]
Min.
0
voltage regulator internal resistors are not used. V
D
1
1
0
7
to
D
0
0
0
0
6
=5 to 9V>
Table 17
Table 18
7.0[90H]
EPSON
D
Command address
1
1
1
Typ.
38.1
5
0
voltage variable range and pitch width available from
D
0
0
0
4
S1D15715 Series Technical Manual
0
D
=9V when ∆R2=0Ω in the following manner:
1
0
1
3
(Expression C-2)
(Expression C-3)
(Expression C-4)
to
OUT
____
D
RES pin or the reset command. When
1
1
0
1
2
, V
7.57[9FH]
and V
2
Max.
D
, V
1
0
0
1
3
0
DD2
and V
and V
D
0
1
0
0
and between V
4
SS
Power save command
(composite command)
potentials required for
when V
R
pin must be made
[mV]
Unit
[V]
0
=7V (center
0
and V
SS
27