S1D15715 Epson Electronics America, Inc., S1D15715 Datasheet - Page 31

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

<Setup example: When setting T
From Fig.11 and expression A-1, the following setting will be employed.
Table 14 shows V
the above setting is employed.
(B) When using the external resistor (when V
Rev.1.0
V
Electronic volume
0
[ ]: Commands selected from the electronic volume.
voltage regulator internal resistance ratio
It is also possible to select a supply voltage V
resistor (resistance ratio select command [27H] for the internal V
resistor across V
In this case too, using the electronic volume allows you to control LCD V
thus, adjust the contrast of LCD display.
Voltage V
in the range of |V
V
Table 10.
Variable range
Pitch width
REG
represents the constant voltage source on the IC. Its value at T
V
0
0
is given by the following expression when external resistance values Ra' and Rb' are specified
0
External Rb'
External Ra'
voltage variable range and its pitch width available from electronic volume function when
Content
V
SS
0
0
|<|V
and V
= (1+Rb’/Ra’)･V
= (1+ Rb’/Ra’)･(1-α/200)･V
[V
OUT
EV
6.41[80H]
R
Min.
=(1-α/200)･V
|.
a
as well as V
=25°C and V
V
R
EV
to
R
REG
V
0
and V
0
+
-
EV
=7V>
voltage regulator internal resistor is not used)
D7
]
(Constant voltage source + electronic volume)
0
1
Table 13
Table 14
7.0[90H]
Fig.12
EPSON
0
0
Typ.
.
REG
38
for LCD without using the V
D6
0
0
S1D15715 Series Technical Manual
D5
1
0
(Expression B-1)
to
0
voltage regulator resistors) by adding a
D4
7.58[9FH]
0
1
Register
Max.
V
V
0
SS
a
=25°C is constant as shown in
D3
0
0
0
through the command and,
0
voltage regulator internal
D2
0
0
[mV]
Unit
[V]
D1
1
0
D0
1
0
25