S1D15E06 Series
only by the command without adding any external parts.
The variable range of the VC voltage is from about 1.6
to 7.0 [V]. When the internal step-up is used, or VOUT
is input for use, the VOUT potential should be, in
principle, the voltage 20% or more higher than the
maximum voltage of the VC to be used, giving
consideration to temperature characteristics.
6.6.2 Voltage Regulating Circuit
VOUT generated from the step-up circuit or VOUT input
from the outside produces liquid crystal drive voltage
VC via the voltage regulating circuit. The voltage
regulating circuit is controlled by liquid crystal drive
voltage change command and electronic volume.
The S1D15E06 series has a high precision constant
voltage source, and incorporates 4-step liquid crystal
drive voltage change command and 128-step electronic
volume functions. This makes it possible to provide a
high precision liquid crystal drive voltage regulation
Example: When VC output is 7 [V], VOUT ≥ 8.4 [V]
(three times 2.8 [V], etc.)
When VC output is 4 [V], VOUT ≥ 4.8 [V]
(two times 2.4 [V], three times 1.8 [V])
• Electronic volume
α of Table 6.9 indicates an electronic volume command
value. It takes one of 128 states when the data is set in
the 7-bit electronic volume register.
Table 6.9 shows the value of α by setting the data in the
electronic volume register.
Table 6.9
D6
D5
D4
D3
D2
D1
D0
α
Voltage VC
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
1
0
0
1
2
Small
↑
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
1
1
1
0
1
125
126
127
↓
Large
• Liquid crystal drive voltage selection
The liquid drive voltage range can be selected from 3
states by the liquid crystal drive voltage select command
using the two-bit crystal drive voltage select command
register.
Table 6.10
D1
0
D0
0
VC voltage output range
1.77V to 3.50V
1
0
2.53V to 5.00V
1
1
3.54V to 7.00V
22
EPSON
Rev. 2.1
EPSON [ EPSON COMPANY ]
