stm32l476vg не инициализируется RTC от внешнего кварца LSE

void SystemClock_Config(void)
{
    RCC_OscInitTypeDef RCC_OscInitStruct = { 0 };
    RCC_ClkInitTypeDef RCC_ClkInitStruct = { 0 };
    RCC_PeriphCLKInitTypeDef PeriphClkInit = { 0 };
 
    /* MSI is enabled after System reset, activate PLL with MSI as source */
    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI;
    RCC_OscInitStruct.MSIState = RCC_MSI_ON;
    RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_6;
    RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT;
    RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
    RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_MSI;
    RCC_OscInitStruct.PLL.PLLM = 1;
    RCC_OscInitStruct.PLL.PLLN = 40;
    RCC_OscInitStruct.PLL.PLLR = 2;
    RCC_OscInitStruct.PLL.PLLP = 7;
    RCC_OscInitStruct.PLL.PLLQ = 4;
    if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
    {
        /* Initialization Error */
        Error_Handler();
    }
  
    /* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 
       clocks dividers */
    RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
    RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
    RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
    RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;  
    RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;  
    if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK)
    {
        /* Initialization Error */
        Error_Handler();
    }
 
    PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART1 | RCC_PERIPHCLK_USART3;
    PeriphClkInit.Usart1ClockSelection = RCC_USART1CLKSOURCE_PCLK2;
    PeriphClkInit.Usart3ClockSelection = RCC_USART3CLKSOURCE_PCLK1;
    if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
    {
        Error_Handler();
    }
}

void HAL_RTC_MspInit(RTC_HandleTypeDef* hrtc)
{
    RCC_OscInitTypeDef        RCC_OscInitStruct;
    RCC_PeriphCLKInitTypeDef  PeriphClkInitStruct;
 
    __HAL_RCC_PWR_CLK_ENABLE();
    HAL_PWR_EnableBkUpAccess();
 
    /*##-2- Configure LSE as RTC clock source ###############################*/
    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE;
    RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
    RCC_OscInitStruct.LSEState = RCC_LSE_ON;
    RCC_OscInitStruct.LSIState = RCC_LSI_OFF;
    if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
    { 
        Error_Handler();
    }
  
    PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_RTC;
    PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSE;
    if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)
    { 
        Error_Handler();
    }
 
    /*##-2- Enable RTC peripheral Clocks #######################################*/ 
    /* Enable RTC Clock */ 
    __HAL_RCC_RTC_ENABLE(); 
  
    /*##-4- Configure the NVIC for RTC Alarm ###################################*/
    HAL_NVIC_SetPriority(RTC_Alarm_IRQn, 0x0F, 0);
    HAL_NVIC_EnableIRQ(RTC_Alarm_IRQn);
 
}