S1D12200 Epson Electronics America, Inc., S1D12200 Datasheet - Page 205

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

[When using the V
When the V
voltage V
any external resistor.
The V
| V
In this case, V
the electronic volume value is (00000), V
Rev. 2.1
V
0
–10
5
–9
–8
–7
–6
–5
–4
–3
–2
–1
| < | V
0
Built-in R
5
V
voltage can be obtained by the following expression 2 by adjusting resistors Ra and Rb within the range of
0
V5 voltage by V5 voltage regulating built-in resistor
ratio set value and electronic volume resistor value
(reference value)
[Fig. 2]
5
5
Ra
OUT
can be controlled and the density of liquid crystal display can be controlled by commands only without adding
= (1 + R
5
voltage regulating built-in resistor and the electronic volume function are used, the liquid crystal supply
EV
|.
a
is determined by the constant-voltage source within the IC and by setting the electronic volume. When
5
R
voltage regulating built-in resistor (Use of V
b
a
) • V
V
EV
EV
Built-in R
+
-
..............................
(constant-voltage source
Rb
+ electronic volume)
8
b
V
DD
REG
Electronic volume resistor value(decimal)
2
· = · 2.0 V, being constant.
V
5
EPSON
Fig. 2
16
5
The voltage range of the V
changing the built-in resistor ratio (1 + Rb/Ra) by
command. Reference values are shown in Table 5 and
Fig. 2.
Table 5 V
voltage regulating built-in resistor is set by command.)]
IR1
0
0
1
1
Command
set values (reference values)
5
voltage regulating built-in resistor ratio
IR0
0
1
0
1
V5 voitage regulating built-in
resistor ratio set value (IRI. IRO)
24
5
output can be adjusted by
S1D12400 Series
(1 + Rb/Ra)
(00)
(10)
2.81
3.27
3.72
4.21
(01)
(11)
6–17
32