475
CHAPTER 25 ELECTRICAL SPECIFICATIONS
User’s Manual U15798EJ2V0UD
LCD controller/driver characteristics (T
A
=
−
40 to +85
°
C, V
DD
= 1.8 to 5.5 V)
Parameter
Symbol
Conditions
MIN.
TYP.
MAX.
Unit
LCD reference
V
LCD2
C1 to C4 = 0.47
µ
F
Gain = 1
0.84
1
1.165
V
voltage
Gain = 1.5
1.26
1.5
1.74
V
Gain adjustment
1.0
1.5
times
Doubler output voltage V
LCD1
C1 to C4 = 0.47
µ
F
2V
LCD2
– 0.1
2V
LCD2
2V
LCD2
V
Tripler output voltage V
LCD0
C1 to C4 = 0.47
µ
F
3V
LCD2
– 0.15
3V
LCD2
3V
LCD2
V
Boost wait time
Note 1
t
VAWAIT
Gain = 1
4.5 V
≤
V
DD
≤
5.5 V
4
s
1.8 V
≤
V
DD
< 4.5 V
0.5
s
Gain = 1.5
1.8 V
≤
V
DD
≤
5.5 V
0.5
s
LCD output
R
ODC
40
k
Ω
resistance
Note 2
(common)
LCD output
R
ODS
200
k
Ω
resistance
Note 2
(segment)
Notes 1.
The boost wait time is the wait time from when boosting is started to when display is enabled.
2.
The output resistance is the resistance between the segment/common pin and the V
LC0
, V
LC1
, V
LC2
, or
V
SS
pin.
Remark
C1, C2, C3, and C4 are the capacitors connected between CAPH and CAPL, V
LC2
and GND, V
LC1
and
GND, and V
LC0
and GND, respectively.
V
LC0
V
LC1
V
LC2
C2
C3
C4
CAPH
C1
External pin
CAPL
•
C1 = C2 = C3 = C4 = 0.47 [
µ
F]
V
LCD2
(V)
V
LCD1
(V)
V
LCD0
(V)
V
LCD0
= 3 V (gain = 1)
1
2
3
V
LCD0
= 4.5 V (gain = 1.5)
1.5
3
4.5
Содержание mPD780344 Series
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