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STM32L151VD Datasheet(PDF) 123 Page - STMicroelectronics

Part # STM32L151VD
Description  Ultra-low-power 32-bit MCU ARM-based Cortex-M3, 384KB Flash
PDF  140 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32L151VD Datasheet(HTML) 123 Page - STMicroelectronics

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STM32L151xD STM32L152xD
Electrical characteristics
Doc ID 022027 Rev 6
123/140
6.3.24
LCD controller (STM32L152xD only)
The STM32L152xD 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.
Table 72.
LCD controller characteristics
Symbol
Parameter
Min
Typ
Max
Unit
VLCD
LCD external voltage
-
-
3.6
V
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
-
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)
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 VDD = 2.2 V
-
3.3
-
µA
Supply current at VDD = 3.0 V
-
3.1
-
RHtot
(2)
2.
Guaranteed by design, not tested in production.
Low drive resistive network overall value
5.28
6.6
7.92
M
Ω
RL
(2)
High drive resistive network total value
192
240
288
k
Ω
V44
Segment/Common highest level voltage
-
-
VLCD
V
V34
Segment/Common 3/4 level voltage
-
3/4 VLCD
-
V
V23
Segment/Common 2/3 level voltage
-
2/3 VLCD
-
V12
Segment/Common 1/2 level voltage
-
1/2 VLCD
-
V13
Segment/Common 1/3 level voltage
-
1/3 VLCD
-
V14
Segment/Common 1/4 level voltage
-
1/4 VLCD
-
V0
Segment/Common lowest level voltage
0
-
-
ΔVxx(3)
3.
Based on characterization, not tested in production.
Segment/Common level voltage error
TA = -40 to 85 °C
--
± 50
mV



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