19 eleCTRiCal ChaRaCTeRiSTiCS
S1C63003/004/008/016 TeChniCal Manual
Seiko epson Corporation
19-3
(Rev. 1.1)
analog Circuit Characteristics and Current Consumption
19.4
lCD Driver
19.4.1
The typical values in the following LCD driver characteristics varies depending on the panel load (panel size, drive
duty, number of display pixels and display contents), so evaluate them by connecting to the actually used LCD
panel.
S1C63004/008/016 lCD drive voltage (V
C1
reference)
Unless otherwise specified: V
DD
=1.2 to 1.7V (1.5V type) or V
DD
=1.8 to 5.5V (3V type), V
SS
=0V, Ta=25
°
C, C
1
–C
6
=0.1µF,
When a checker pattern is displayed, No panel load, A 1 M
Ω
load resistor is connected between V
SS
and V
C1
, between V
SS
and V
C2
,
and between V
SS
and V
C3
.
Item
Symbol
Condition
Min.
Typ.
Max.
Unit
LCD drive voltage
V
C1
0.335
×
V
C3
(typ.)
–
0.363
×
V
C3
(typ.)
V
V
C2
0.646
×
V
C3
(typ.)
–
0.700
×
V
C3
(typ.)
V
V
C3
LC[3:0]=0H
Typ.
×
0.96
2.75
Typ.
×
1.04
V
LC[3:0]=1H
2.84
V
LC[3:0]=2H
2.92
V
LC[3:0]=3H
3.00
V
LC[3:0]=4H
3.08
V
LC[3:0]=5H
3.17
V
LC[3:0]=6H
3.25
V
LC[3:0]=7H
3.34
V
LC[3:0]=8H
3.42
V
LC[3:0]=9H
3.50
V
LC[3:0]=AH
3.58
V
LC[3:0]=BH
3.67
V
LC[3:0]=CH
3.75
V
LC[3:0]=DH
3.83
V
LC[3:0]=EH
3.91
V
LC[3:0]=FH
4.00
V
Notes: • Depending on the panel load, when V
DD
is 1.2 V or lower, the LCD drive voltage does not measure up to the
specifications above.
• Contrast settings to set “V
C1
Max. > V
DD
” are impossible, as the V
C1
voltage is always lower than V
DD
. See
“LCD drive voltage - supply voltage characteristic (1/3 bias, V
C1
reference), 1.5 V low-voltage type” in Sec-
tion 19.8, “Characteristics Curves (reference value).”
S1C63004/008/016 lCD drive voltage (V
C2
reference)
Unless otherwise specified: V
DD
=1.8 to 5.5V, V
SS
=0V, Ta=25
°
C, C
1
–C
6
=0.1µF, When a checker pattern is displayed, No panel load
A 1 M
Ω
load resistor is connected between V
SS
and V
C1
, between V
SS
and V
C2
, and between V
SS
and V
C3
.
Item
Symbol
Condition
Min.
Typ.
Max.
Unit
LCD drive voltage
V
C1
0.323
×
V
C3
(typ.)
–
0.349
×
V
C3
(typ.)
V
V
C2
0.650
×
V
C3
(typ.)
–
0.704
×
V
C3
(typ.)
V
V
C3
LC[3:0]=0H
Typ.
×
0.96
2.84
Typ.
×
1.04
V
LC[3:0]=1H
2.92
V
LC[3:0]=2H
3.01
V
LC[3:0]=3H
3.09
V
LC[3:0]=4H
3.17
V
LC[3:0]=5H
3.26
V
LC[3:0]=6H
3.34
V
LC[3:0]=7H
3.43
V
LC[3:0]=8H
3.51
V
LC[3:0]=9H
3.60
V
LC[3:0]=AH
3.68
V
LC[3:0]=BH
3.77
V
LC[3:0]=CH
3.85
V
LC[3:0]=DH
3.94
V
LC[3:0]=EH
4.02
V
LC[3:0]=FH
4.11
V
Note: V
C2
reference cannot be set in the 1.5 V low-voltage type, as the maximum operating voltage is 1.7 V.