Power consumption during STOP2 mode.

[LMehm]

Hello!

I have some power consumption during STOP2 mode which is around 470 microamps with some strange waveform like this:

Is it possible some peripheral to cause this consumption?!

[Aime]

Hi @LMehm ,

The spikes seem periodic maybe due to a software activity or a pin connected to a external peripheral.

Which STM32 are you using? How to do enter in STOP2 mode?

Best regards,

Aime

[LMehm]

Hi Aime!

Thank you for your reply!

I am using STM32L476 microcontroller.

Here is the main cycle:

while (1)

  {

    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */

  if(Flags&START_RAD_MEASURE){

  Flags&=~START_RAD_MEASURE;

  ex_Hibernate();

  sensorMeasureOnce();

  }

  if(Flags&ALARM_DETECTED)

  {

  Flags&=~ALARM_DETECTED;

  HAL_GPIO_WritePin(ALRM_LED_GPIO_Port, ALRM_LED_Pin, GPIO_PIN_SET);

  alrmCnt=2;

  }

  HAL_SuspendTick();

  HAL_SPI_DeInit(&hspi1);

  HAL_UART_DeInit(&huart2);

  HAL_PWREx_EnterSTOP2Mode(PWR_SLEEPENTRY_WFI);

  if(alrmCnt!=0)

  {

  alrmCnt--;

  if(alrmCnt==0)

  {

  HAL_GPIO_WritePin(ALRM_LED_GPIO_Port, ALRM_LED_Pin, GPIO_PIN_RESET);

  }

  }

  HAL_ResumeTick();

  SystemClock_Config();

  MX_SPI1_Init();

  MX_USART2_UART_Init();

  }