STM32 MCUs products

Showing results for 
Search instead for 
Did you mean: 

Forum Posts

STM32L4 wakes up instantly from low-power sleep

Hi all,I want to measure the power consumption on my board which has a STM32L431CC. Other than the µC, there is nothing left on the board excepted for an RC filter on the NRST pin, I removed the RTC quartz.Inspired by the example code i found, i wrot...

Steven.D by Associate II
  • 2 replies
  • 0 kudos

Using timer to wake from sleep

Im attempting to put the cpu to sleep between ticks of timer 15 on a stm32L432, The LED flashs without the Sleep code however it never wakes up from the timer interuptvoid HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef * htim) { HAL_ResumeTick(); if...

PGood.1 by Associate II
  • 2 replies
  • 0 kudos

Problems with RTC - wakeup from STOP-Mode

Hi,i am using a STM32L010K8 MCU and i want to wake up from stop mode when a RTC-Wakeup interrupt occours. Here in this example i set the RTC wakeup interrupt for 30 seconds. Without entering the sleep mode the RTC IRQ works fine. But if the MCU enter...

ledi001 by Associate III
  • 2 replies
  • 0 kudos

Resolved! STM32H743: Backup RAM not saved

I'm trying to use the 4K backup RAM on the STM32H743. The RTC is working and keeps time so I know the battery system is OK. I can read and write to the backup RAM OK but it loses all data on power off.I've enabled access as follows:HAL_PWREx_EnableBk...

PMath.4 by Senior III
  • 12 replies
  • 1 kudos

Resolved! WUF flag when exiting Standby

Hello.STM32G070CI'm having some issues with the WUF flag when exiting Standby. Exit mode is set to WKUP1 (PA0).I poll the register after exiting standby and in the PWR->SR1 register, the SBF flag is set, but the WUF1 flag is cleared.I also noticed an...

Akoli.2 by Associate III
  • 3 replies
  • 0 kudos