S1D1 Epson Electronics America, Inc., S1D1 Datasheet - Page 20

• Manufacturer Part Number: S1D1
• Description: LCD Controller-driver With Built-in Character ROM
• Manufacturer: Epson Electronics America, Inc.

S1D15100 Series
9. SUPPLY VOLTAGES
In addition to V
V
V
the following equations.
where V
be such that
LCD supply voltage connections when the LCD drive
supply is connected to V
connections when the drive supply is independent of
V
1–8
1
2
SS
, V
are generated internally. V
V
V
V
V
, in Figure 2.
Figure 2. LCD drive supply not connected to V
1
2
3
DD
2
Figure 1. LCD drive supply connected to V
= V
= V
= V
and V
LCD
DD
DD
DD
V
is the LCD drive voltage. The voltages must
1
3
. V
– 1/3V
– 2/3V
– V
DD
V
3
, there are three LCD supply voltages:
LCD
is supplied externally, whereas V
2
LCD
LCD
V
SS
3
are shown in figure 1, and the
V
V
V
V
V
DD
1
2
3
SS
1
, V
V
V
V
V
V
DD
1
2
3
SS
2
and V
3
are given by
SS
SS
1
and
EPSON
When there is a lot of distortion in the LCD drive
waveforms, connect bleeder resistors as shown in the
following figure.
R1
R2
R3
V
V
V
V
V
DD
1
2
3
SS
Rev. 1.0