Peripheral firmware examples description

AN4062

8/17

DocID022897 Rev 3

Description

After reset, the program waits for the User button connected to PA.00 to be pressed to enter

the selected low power mode.

•

When the RTC is used, the wakeup from low power mode is automatically generated

by the RTC (after 5s).

•

In Sleep mode and Standby mode, press again the User button to exit the low power

mode.

The different low power mode configurations are:

Sleep mode

–

System running at PLL (48 MHz)

–

Flash 3 wait state

–

Code running from Internal Flash

–

All peripherals disabled

–

Wakeup using EXTI Line (User push-button PA.00)

Stop mode

–

RTC clocked by LSI

–

Regulator in LP mode

–

HSI, HSE OFF and LSI if not used as RTC clock source

–No IWDG

–

Flash in deep power down mode

–

Automatic Wakeup using RTC clocked by LSI

Standby mode

–RTC OFF

–

IWDG and LSI OFF

–

Wakeup using Wakeup Pin (PA.00)

Standby mode with RTC clocked by LSI

–

RTC clocked by LSI

–

IWDG OFF and LSI OFF if not used as RTC clock source

–

Automatic Wakeup using RTC clocked by LSI

3.7

Flash program example

Purpose

This example describes how to program the STM32F0xx internal Flash.

Description

In this example:

•

After Reset, the Flash memory Program/Erase Controller is locked. The

FLASH_Unlock function is used to unlock it.

•

Before programming the desired addresses, an erase operation is performed using the

Flash erase sector feature. The erase procedure starts with the calculation of the