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STM32L151VD Datasheet(PDF) 129 Page - STMicroelectronics

Part # STM32L151VD
Description  Ultra-low-power 32-bit MCU ARM® Cortex®-M3, 384KB Flash, 48KB SRAM, 12KB EEPROM, LCD, USB, ADC, DAC, memory I/F
PDF  154 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32L151VD Datasheet(HTML) 129 Page - STMicroelectronics

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DocID022027 Rev 11
129/154
STM32L151xD STM32L152xD
Electrical characteristics
129
6.3.24
LCD controller
The device 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 73. 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.
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. Guaranteed by characterization results.
Segment/Common level voltage error
TA = -40 to 105 ° C
--
± 50
mV



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