STMicroelectronics Discovery kit for STM32L151/152 line - with STM32L152RC MCU STM32L152C-DISCO STM32L152C-DISCO Hoja De Datos

DocID022799 Rev 6

1. Option 1: LCD power supply is provided by a dedicated VLCD supply source, VSEL switch is open.
2. Option 2: LCD power supply is provided by the internal step-up converter, VSEL switch is closed, an 

external capacitance is needed for correct behavior of this converter.

MS32485V1

V

DD1/2/.../N

N x 100 nF
+ 1 x 10 μF

Step-up
Converter

V

SS1/2/.../N

V

DD

100 nF

V

LCD

V

LCDrail1

V

LCDrail2

V

LCDrail3

V

LCD

PB0 or PE12

PB2

PB12 or PE11

C

EXT

C

rail3

LCD

VSEL

C

rail2

C

rail1

Option 1

Option 2

ai14126b

VDD

VDDA

IDD