Datasheet

Electrical characteristics STM32L151x6/8/B, STM32L152x6/8/B
50/131 DocID17659 Rev 9
6.1.7 Optional LCD power supply scheme
Figure 13. Optional LCD power supply scheme
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.
6.1.8 Current consumption measurement
Figure 14. Current consumption measurement scheme
MS32462V1
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
LCD
C
EXT
LCD
VSEL
Option 1
Option 2
ai14126b
V
DD
V
DDA
I
DD