29 eleCTRiCal ChaRaCTeRiSTiCS
S1C17624/604/622/602/621 TeChniCal Manual
Seiko epson Corporation
29-9
Unless otherwise specified: V
DD
= 1.8 to 3.6V, V
SS
= 0V, Ta = -25 to 70°C
item
Symbol
Min.
Typ.
Max.
unit
SCL cycle time
t
SCL
2500
ns
Start condition hold time
t
STH
1/f
SYS
ns
Data output delay time
t
SDD
1/f
SYS
ns
Stop condition hold time
t
SPH
1/f
SYS
ns
*
f
SYS
: System operating clock frequency
lCD Driver Characteristics
29.9
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.
lCD drive voltage
Unless otherwise specified: V
DD
= 2.5 to 3.6V, V
SS
= 0V, Ta = 25
°
C, C
2
–C
5
= 0.1µF, Checker pattern displayed, No panel load,
VCSEL = 1 (V
C2
reference voltage)
item
Symbol
Condition
Min.
Typ.
Max.
unit
LCD drive voltage
(V
C2
reference voltage)
V
C1
Connect 1M
W
load resistor between V
SS
and V
C1
0.324
×
V
C3
(Typ.)
0.350
×
V
C3
(Typ.)
V
V
C2
Connect 1M
W
load resistor between V
SS
and V
C2
0.649
×
V
C3
(Typ.)
0.701
×
V
C3
(Typ.)
V
V
C3
Connect 1M
W
load resistor
between V
SS
and V
C3
LC[3:0] = 0x0
Typ.
×
0.96
2.56
Typ.
×
1.04
V
LC[3:0] = 0x1
2.62
V
LC[3:0] = 0x2
2.68
V
LC[3:0] = 0x3
2.74
V
LC[3:0] = 0x4
2.80
V
LC[3:0] = 0x5
2.86
V
LC[3:0] = 0x6
2.92
V
LC[3:0] = 0x7
2.98
V
LC[3:0] = 0x8
3.04
V
LC[3:0] = 0x9
3.10
V
LC[3:0] = 0xa
3.15
V
LC[3:0] = 0xb
3.21
V
LC[3:0] = 0xc
3.27
V
LC[3:0] = 0xd
3.33
V
LC[3:0] = 0xe
3.39
V
LC[3:0] = 0xf
3.45
V
Unless otherwise specified: V
DD
= 1.8 to 3.6V, V
SS
= 0V, Ta = 25
°
C, C
2
–C
5
= 0.1µF, Checker pattern displayed, No panel load,
VCSEL = 0 (V
C1
reference voltage)
item
Symbol
Condition
Min.
Typ.
Max.
unit
LCD drive voltage
(V
C1
reference voltage)
V
C1
Connect 1M
W
load resistor between V
SS
and V
C1
0.333
×
V
C3
(Typ.)
0.360
×
V
C3
(Typ.)
V
V
C2
Connect 1M
W
load resistor between V
SS
and V
C2
0.645
×
V
C3
(Typ.)
0.696
×
V
C3
(Typ.)
V
V
C3
Connect 1M
W
load resistor
between V
SS
and V
C3
LC[3:0] = 0x0
Typ.
×
0.96
2.50
Typ.
×
1.04
V
LC[3:0] = 0x1
2.56
V
LC[3:0] = 0x2
2.61
V
LC[3:0] = 0x3
2.67
V
LC[3:0] = 0x4
2.73
V
LC[3:0] = 0x5
2.79
V
LC[3:0] = 0x6
2.85
V
LC[3:0] = 0x7
2.90
V
LC[3:0] = 0x8
2.96
V
LC[3:0] = 0x9
3.02
V
LC[3:0] = 0xa
3.08
V
LC[3:0] = 0xb
3.14
V
LC[3:0] = 0xc
3.19
V
LC[3:0] = 0xd
3.25
V
LC[3:0] = 0xe
3.31
V
LC[3:0] = 0xf
3.37
V