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| STM32L151X6 Datasheet, PDF (104/133 Pages) STMicroelectronics – Reset and supply management | |||
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Electrical characteristics
STM32L151x6/8/B STM32L152x6/8/B
6.3.21
LCD controller (STM32L152xx only)
The STM32L152xx embeds a built-in step-up converter to provide a constant LCD reference
voltage independently from the VDD voltage. An external capacitor Cext must be connected
to the VLCD pin to decouple this converter.
Symbol
Table 62. LCD controller characteristics
Parameter
Min
Typ
Max
Unit
VLCD LCD external voltage
-
-
3.6
VLCD0 LCD internal reference voltage 0
-
2.6
-
VLCD1 LCD internal reference voltage 1
-
2.73
-
VLCD2 LCD internal reference voltage 2
-
2.86
-
VLCD3 LCD internal reference voltage 3
-
2.98
-
V
VLCD4 LCD internal reference voltage 4
-
3.12
-
VLCD5 LCD internal reference voltage 5
-
3.26
-
VLCD6 LCD internal reference voltage 6
-
3.4
-
VLCD7 LCD internal reference voltage 7
-
3.55
-
Cext
VLCD external capacitance
0.1
-
2
µF
ILCD(1)
RHtot(2)
RL(2)
Supply current at VDD = 2.2 V
Supply current at VDD = 3.0 V
Low drive resistive network overall value
High drive resistive network total value
-
3.3
-
3.1
5.28
6.6
192
240
-
µA
-
7.92
MΩ
288
kΩ
V44
Segment/Common highest level voltage
-
-
VLCD
V
V34
Segment/Common 3/4 level voltage
-
3/4 VLCD
-
V23
Segment/Common 2/3 level voltage
-
2/3 VLCD
-
V12
Segment/Common 1/2 level voltage
V13
Segment/Common 1/3 level voltage
-
1/2 VLCD
-
V
-
1/3 VLCD
-
V14
Segment/Common 1/4 level voltage
-
1/4 VLCD
-
V0
Segment/Common lowest level voltage
0
-
-
ÎVxx(3)
Segment/Common level voltage error
TA = -40 to 85 ° C
-
-
± 50
mV
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
2. Guaranteed by design.
3. Guaranteed by characterization results.
104/133
DocID17659 Rev 12
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