Application description

AN3413

4/18

DocID018933 Rev 2

Figure 1. Application schematics

1.4

Application principle

1.4.1

Overview

STM32L1xx DISCOVERY includes specific analog and logic hardware that is connected to

current when the device is placed in different power consumption modes such as:

•

Run mode

•

Sleep mode

•

Low power run mode

•

Low power sleep mode

•

Stop mode with operating RTC

•

Stop mode without RTC

•

Standby mode

The user reads the value displayed on the STM32L1xx DISCOVERY’s LCD panel, to know

how much power the device is currently consuming.

With this demonstration, you can obtain an overview of low power modes and supply current

requirements for each low power mode available on STM32L152.

C25

PA0

R39

330

R40

Blue

Green

PB7

PB6

LD3

LD4

User push-button

100 nF

LCD controller

STM32L152RBT6

or STM32L152RCT6

LCDCOM[3:0]

LCDSEG[23:0]

LCD

R38

10 k

VDD

BAR

0

1

2

3

IDD measurement circuitry

PA4

PA0

PC13

PB0..1, PC4..5,

PA6..7

Touch sensing

linear sensor

660

MS19810V2