I am using NUCLEO-U031R8 board and MCU is STM32UO31R8while reding reference voltage by using below code #define VREFINT_CAL_ADDR ((uint16_t*) (0x1FFF6EA4UL)) ADC1_COMMON->CCR |= ADC_CCR_VREFEN; uint16_t Internal_voltage_reference = (uint16_t)*VREFI...