S1D1 Epson Electronics America, Inc., S1D1 Datasheet - Page 520

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

S1D15A06 Series
Power supply circuit
The power supply circuit generates the voltage to drive
the LCD panel at low power consumption.
The power supply circuit consists of a booster circuit,
voltage regulator circuit, and voltage follower circuit,
and is controlled by Power control set command. Using
this command, the booster circuit, the voltage regulator
circuit, and the voltage follower circuit can be indepen-
dently turned ON or OFF. Consequently, the external
Table 9
* Pins on the booster circuits denote CAP1+, CAP1-, CAP2+, CAP2- and CAP3+ pins.
* Although other combinations than the above are available, they are not pragmatic and thus not recommendable.
*1: S1D15A06D00B
*4: V
Booster circuit
Using the booster circuit, it is possible to produce Quad/
Triple/Double boosting of the V
Quad boosting : If capacitor are inserted between CAP1+
and CAP1-, between CAP2+ and CAP2-, between
CAP3+ and CAP1-, between V
potential between V
toward the positive side and it is output at V
Triple boosting : If capacitor are inserted between
CAP1+ and CAP1-, between CAP2+ and CAP2-,
12–16
Table 8
External power supply alone is used
Built-in power supply alone is used
D2 Booster circuit control bit
D1 Voltage adjusting circuit (V adjusting circuit) control bit
D0 Voltage follower circuit (V/F circuit) control bit
V/F circuits alone are used
DD2
V/F circuit alone is used
is recommended to short-circuit to V
V adjusting and
Usage
DD2
*
and V
*2: S1D15A06D01B
SS
is boosted to quadruple
DD2
Item
OUT
–V
Model D2 D1 D0
SS
and V
*1
*2
*2
*3
voltage level.
OUT
DD2
1
0
0
DD
0
*
pin.
, the
1
1
0
0
*3: S1D15A06D02B
EPSON
1
0
1
1
Booster V adjusting
circuit.
power supply and part of internal power supply circuit
functions can be used simultaneously. Table 8 shows
reference combinations.
Table 8 lists the functions controllable from 3 bits data
of the power control set command. And, Table 9 shows
sample combinations of the bits.
Select the models depending on the state of use.
OFF
between V
and V
pin.
Double boosting : If capacitor are inserted between
CAP1+ and CAP1-, between V
CAP2-, and jumper between CAP2+, CAP3+ and V
the double boosted voltage appears at V
The boosted voltage relationships are shown in Figure
7.
OFF
OFF
ON
OUT
, the triple boosted voltage appears at V
circuit.
OUT
OFF
OFF
ON
ON
*
and V
“1”
ON
ON
ON
DD2
circuit.
OFF
V/F
ON
ON
ON
, and jumper between CAP3+
State
V
External
entered.
voltage
0
V
OUT
V
V
to V
OFF
OFF
OFF
OUT
“0”
0
DD2
*4
and V
*4
4
OUT
*4
Rev. 1.0a
pin.
DD2
Pins on
booster
circuit
OPEN
OPEN
OPEN
Used
, open
OUT
OUT
,