Electrical characteristics
STM32L100RC
96/104
DocID024995 Rev 4
6.3.21 LCD
controller
The device embeds a built-in step-up converter to provide a constant LCD reference voltage
independently from the V
DD
voltage. An external capacitor C
ext
must be connected to the
V
LCD
pin to decouple this converter.
2.
The delay is characterized for 100 mV input step with 10 mV overdrive on the inverting input, the non-
inverting input set to the reference.
3.
Comparator consumption only. Internal reference voltage (necessary for comparator operation) is not
included.
Table 61. LCD controller characteristics
Symbol
Parameter
Min
Typ
Max
Unit
V
LCD
LCD external voltage
-
-
3.6
V
V
LCD0
LCD internal reference voltage 0
-
2.6
-
V
LCD1
LCD internal reference voltage 1
-
2.73
-
V
LCD2
LCD internal reference voltage 2
-
2.86
-
V
LCD3
LCD internal reference voltage 3
-
2.98
-
V
LCD4
LCD internal reference voltage 4
-
3.12
-
V
LCD5
LCD internal reference voltage 5
-
3.26
-
V
LCD6
LCD internal reference voltage 6
-
3.4
-
V
LCD7
LCD internal reference voltage 7
-
3.55
-
C
ext
V
LCD
external capacitance
0.1
-
2
µF
I
LCD
(1)
1.
LCD enabled with 3 V internal step-up active, 1/8 duty, 1/4 bias, division ratio= 64, all pixels active, no LCD
connected.
Supply current at V
DD
= 2.2 V
-
3.3
-
µA
Supply current at V
DD
= 3.0 V
-
3.1
-
R
Htot
(2)
2.
Guaranteed by design, not tested in production.
Low drive resistive network overall value
5.28
6.6
7.92
M
Ω
R
L
(2)
High drive resistive network total value
192
240
288
k
Ω
V
44
Segment/Common highest level voltage
-
-
V
LCD
V
V
34
Segment/Common 3/4 level voltage
-
3/4 V
LCD
-
V
V
23
Segment/Common 2/3 level voltage
-
2/3 V
LCD
-
V
12
Segment/Common 1/2 level voltage
-
1/2 V
LCD
-
V
13
Segment/Common 1/3 level voltage
-
1/3 V
LCD
-
V
14
Segment/Common 1/4 level voltage
-
1/4 V
LCD
-
V
0
Segment/Common lowest level voltage
0
-
-
Δ
Vxx
(3)
3.
Guaranteed by characterization results, not tested in production.
Segment/Common level voltage error
T
A
= -40 to 105
°
C
-
-
±
50
mV
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http://www.vicor.top/
021-31660491