S1D15E06 Series
control of step-up circuit, voltage regulating circuit and
liquid crystal drive potential generating circuit. This
allows a combined use of the external power supply and
part of built-in power supply functions. Table 6.7
shows functions controlled by the 5-bit data of the
control set command, and Table 6.8 shows reference
combinations. The power supply circuit is enabled only
during master operation.
6.6 Power supply circuit
This is a power supply circuit to generate voltage
required for liquid crystal drive, and is characterized by
a low power consumption. It consists of a step-up
circuit, voltage regulating circuit and liquid crystal
drive voltage generating circuit, and is enabled only
during master operation. The power supply circuit uses
the power control set command to provide an on/off
Table 6.7 Control by 5-bit data of the control set command
Item
State
“1”
Triple Double Single
“0”
–
D4 Step-cut circuit scaling factor select bit 1
–
1
1
–
–
–
1
0
–
–
–
0
1
–
–
–
D3 Step-cut circuit scaling factor select bit 2
–
–
D2 Step-cut circuit control bit
ON
ON
ON
OFF
OFF
OFF
D1 Voltage regulator circuit (VC regulator circuit) control bit
D0 LCD driving potential generating circuit (LCDV circuit) control bit
Table 6.8 Reference combination
Circuits used
D4 D3 D2 D1 D0 Step-up VC regulator
LCDV
circuit
Eternal input
power supply
circuit
circuit
1Use of all built-in
power supplies
Triple step-up
Double step-up
VOUT = VDD
1
1
0
1
0
1
1
1
1
1
1
1
1
1
1
“1”
“1”
“1”
“1”
“1”
“1”
“1”
“1”
“1”
–
–
–
×
2VC regulating circuit and
0
0
0
1
1
“0”
“1”
“1”
VOUT
LCDV circuit only
×
×
×
×
3LCDV circuit only
0
0
0
0
0
0
0
0
1
0
“0”
“0”
“0”
“0”
“1”
VC
×
4External power supply
“0”
V3, V2, V1, VC,
MV1, MV2
only (S1D15E06D00B )
*
* Any combinations other than the above are not available.
*100ms or more should be kept from VC regulator circuit ON to LCDV circuit ON.
20
EPSON
Rev. 2.1
EPSON [ EPSON COMPANY ]
