Reference Voltage always reads as 0xFFFF

[Masud]

I am using NUCLEO-U031R8 board and MCU is STM32UO31R8

while 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)*VREFINT_CAL_ADDR;

I am always getting 0xFFFF

what could be the issue?

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[KDJEM.1 · Accepted solution]

Hello @Masud and welcome to the community;

This issue is already reported here and reported internally.

An internal ticket number: 183723 (PS: ticket number 183723 is an internal tracking number and is not accessible or usable by customers).

May be this post help you.

I apologize for any inconvenience and thank you for your contribution in STCommunity.

Thank you.

Kaouthar