Optional Lcd Power Supply Scheme; Current Consumption Measurement; Figure 13. Optional Lcd Power Supply Scheme; Figure 14. Current Consumption Measurement Scheme - STMicroelectronics STM32L151CB Manual
Ultra-low-power 32-bit mcu arm-based cortex-m3, 128kb flash, 16kb sram, 4kb eeprom, lcd, usb, adc, dac
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STM32L151x6/8/B, STM32L152x6/8/B
6.1.7
Optional LCD power supply scheme
Option 1
Option 2
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 13. Optional LCD power supply scheme
V
DD
N x 100 nF
+ 1 x 10 μF
V
LCD
100 nF
C
EXT
Figure 14. Current consumption measurement scheme
DocID17659 Rev 10
V
Step-up
DD1/2/.../N
Converter
V
LCD
V
SS1/2/.../N
Electrical characteristics
VSEL
MS32462V1
49/129
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