S1D10605 Epson Electronics America, Inc., S1D10605 Datasheet - Page 227

• Manufacturer Part Number: S1D10605
• Description: S1d15000 Series Lcd Driver With Ram
• Manufacturer: Epson Electronics America, Inc.

supply and a portion of the functions of the built-in power
supply.
When (T1, T2) = (HIGH, LOW), the boosting circuit
does not work and open the boosting circuit terminals
(CAP1+, CAP1-, CAP2+ and CAP2-) and apply liquid
crystal driving voltage to the Vout terminals from outside.
S1D15600/601/602 Series
Display Data Latch Circuit
The display data latch circuit temporarily stores the
output display data from the display data RAM to the
LCD driver circuit in each common period. Since the
Normal/Inverse Display, Display ON/OFF and Display
All Points ON/OFF commands control the data in this
latch, the data in the display data RAM is remains
unchanged.
LCD Driver Circuit
This multiplexer generates 4-value levels for the LCD
driver, having 167 outputs of 70 SEG outputs, 96 SEG/
COM dual outputs and a COM output for the indicator
display. The SEG/COM dual outputs have a shift register
and sequentially transmits COM scanning signals. The
LCD driver voltage is output according to the combina-
tion of display data, COM scanning signal and FR signal.
Figure 9 shows a typical SEG/COM output waveform.
Oscillator Circuit
The low power consumption type CR oscillator adjusting
the oscillator frequency by use of only oscillator resistor
Rf is used as a display timing signal source or clock for
the voltage raising circuit of the LCD power supply.
The oscillator circuit is only available in the master
operation mode. When a signal from the oscillator circuit
is used for display clock, fix the CL pin to the V
When the oscillator circuit is not used, fix the OSC1 or
OSC2 pin to the V
The oscillator signal frequency is divided and output
from the CLO pin as display clock. The frequency is
divided to one-fourth, one-eighth or one-sixteenth in the
S1D15600, S1D15601 or S1D15602, respectively.
7–32
HIGH LOW
HIGH HIGH
LOW LOW
LOW HIGH
T1
T2
Voltage
DD
tripler
or V
SS
level, respectively.
regulator
Voltage
SS
level.
follower
voltage
EPSON
When (T1, T2) = (HIGH, HIGH), the boosting circuit and
voltage regulation circuit do not work and open the
boosting circuit terminals and the VR terminals and
apply liquid crystal driving voltage connecting the V
terminals.
FR Control Circuit
The LCD driver voltage supplied to the LCD driver
outputs is selected using FR signal.
Power Supply Circuit
This is a power circuit to produce voltage needed to drive
liquid crystals at a low power consumption. This circuit
is valid only when the S1D1560
opera-tion. The power circuit consists of voltage tripler,
voltage regulator and the voltage follower.
The power circuit built into S1D1560
smaller scale liquid crystal panels and it is not too
suitable when the picture element is larger or to drive a
liquid crystal panel with lager indication capacity using
multiple chips. With liquid crystal panels with a larger
load capacity, the quality of display may become very
bad. Use an external power in such cases. (If an external
amp circuit is configured, we recommend to use the
S1F76600 and S1F76610.)
The power circuit can be controlled by the built-in power
ON/OFF command. When the built-in power is turned
off, all of the boosting circuit, voltage regulation circuit
and voltage follower circuit goes open. In this case, the
liquid crystal driving voltage V
should be supplied from outside and the terminals CAP1+,
CAP1-, CAP2+, CAP2-, Vout and V
opened.
If the built-in power supply is turned on, you must always
enter this command after the wait time of the built-in
power supply turn-on completion command.
Various functions of the power circuit may be selected by
combinations of the setting of the T1 and T2. It is also
possible to make a combined use of the external power
External
voltage
input
V
V
OUT
–
–
5
terminals
Voltage
tripler
OPEN
OPEN
*
1
, V
D
**
*
2
D
R
, V
V
B
**
should be kept
R
*
3
, V
terminals
OPEN
B
master is in
*
Rev. 4.6
4
is set for
and V
5
5