29 eleCTRiCal ChaRaCTeRiSTiCS
29-10
Seiko epson Corporation
S1C17624/604/622/602/621 TeChniCal Manual
lCD drive voltage-supply voltage characteristic lCD drive voltage-supply voltage characteristic
(when V
C2
reference voltage is selected)
(when V
C1
reference voltage is selected)
When a 1 M
W
load resistor is connected between V
SS
and V
C3
When a 1 M
W
load resistor is connected between V
SS
and V
C3
(no panel load), Ta = 25°C, Typ. value
(no panel load), Ta = 25°C, Typ. value
1.5
2.0
2.5
3.0
3.5
4.0
4.0
3.0
2.0
1.0
V
DD
[V]
V
C3
[V]
LC
x
= 0xf
LC
x
= 0x0
1.5
1.8
2.1
2.4
2.7
3.0
4.0
3.0
2.0
1.0
V
DD
[V]
V
C3
[V]
LC
x
= 0xf
LC
x
= 0x0
lCD drive voltage-temperature characteristic
lCD drive voltage-load characteristic
Typ. value (V
C2
, V
C1
reference voltage)
When a load is connected to the V
C3
pin only
LC
x
= 0xf, Ta = 25°C, Typ. value
-50
1.05V
C3
1.04V
C3
1.03V
C3
1.02V
C3
1.01V
C3
1.00V
C3
0.99V
C3
0.98V
C3
0.97V
C3
0.96V
C3
0.95V
C3
-25
0
25
50
75
100
Ta [
°C
]
V
C3
[V]
-I
VC3
[µA]
V
C3
[V]
0
3.60
3.50
3.40
3.30
3.20
3.10
3.00
2.90
4
8
12
16
20
VCSEL = 0
VCSEL = 1
SeG/COM output characteristics
Unless otherwise specified: V
DD
= 1.8 to 3.6V, V
SS
= 0V, Ta = -25 to 70
°
C
item
Symbol
Condition
Min.
Typ.
Max.
unit
Segment/Common output current
I
SEGH
SEG
xx
, COM
xx
, V
SEGH
= V
C3
- 0.1V
-5
µA
I
SEGL
SEG
xx
, COM
xx
, V
SEGL
= 0.1V
5
µA
S1C17624/604/622 lCD driver circuit current consumption
Unless otherwise specified: V
DD
= 1.8 to 3.6V, V
SS
= 0V, Ta = 25
°
C, C
2
–C
5
= 0.1µF, No LCD panel load,
PCKEN[1:0] = 0x0 (OFF), FLCYC[2:0] = 0x4 (1 cycle), CCLKGR[1:0] = 0x0 (gear ratio 1/1)
item
Symbol
Condition
Min.
Typ.
Max.
unit
LCD circuit current with V
C2
reference
voltage
*
1
I
LCD2
DSPC[1:0] = 0x1 (checker pattern),
LC[3:0] = 0xf, OSC1 = 32kHz, V
DD
= 2.5
to 3.6V, VCSEL = 1
1.7
5
µA
Heavy load protection mode
LCD circuit current with V
C2
reference
voltage
*
1
I
LCD2H
DSPC[1:0] = 0x1 (checker pattern),
LC[3:0] = 0xf, OSC1 = 32kHz, V
DD
= 2.5
to 3.6V, LHVLD = 1, VCSEL = 1
21
32
µA
LCD circuit current with V
C1
reference
voltage
*
1
I
LCD1
DSPC[1:0] = 0x1 (checker pattern),
LC[3:0] = 0xf, OSC1 = 32kHz, V
DD
= 1.8
to 3.6V, VCSEL = 0
2.6
8
µA
Heavy load protection mode
LCD circuit current with V
C1
reference
voltage
*
1
I
LCD1H
DSPC[1:0] = 0x1 (checker pattern),
LC[3:0] = 0xf, OSC1 = 32kHz, V
DD
= 1.8
to 3.6V, LHVLD = 1, VCSEL = 0
13
20
µA
*
1 This value is added to the current consumption in HALT mode or current consumption during execution when the LCD circuit is ac-
tive. Current consumption increases according to the display contents and panel load.