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VREF BUFF configuration

Fannyrsy
Associate II

Hello 🙂

I'm am working with a Nucleo WB55 and I am trying to use the ADC. I assume that the reference voltage used for the conversion is equal to 3.6V because I think that this is the default settings and because when I connect 3.3V to the 12 bits ADC input, I only get about 4040/4095.  I saw on other posts that a configuration panel is available for VREF BUFF, but it doesn't exist in my STM32CubeMX  even if I can  choose VREF BUFF as an output on VREF+ pin. 

Here is my pinout view where I can choose VREF+ as VREFBUF_OUT : 

Fannyrsy_0-1700471555715.png

Here is the panel of someone else where VREF BUFF can be configured : 

Fannyrsy_1-1700471740302.png

Finally here is mine where I can't configure VREF BUFF : 

Fannyrsy_2-1700471825553.png

My question is : the microcontroller i use allows to use VREF BUFF but I can't configure it in STM32CubeMX. Can someone help me on that? 

Thanks a lot,

Fanny

 

1 ACCEPTED SOLUTION

Accepted Solutions
Mahmoud Ben Romdhane
ST Employee

Hello @Fannyrsy 

First let me thank you for posting and welcome to the ST Community.

You can find the VREFBUF mode configuration under System Core, SYS, VREFBUF Mode.

Thanks.

Mahmoud.

 

View solution in original post

2 REPLIES 2
Mahmoud Ben Romdhane
ST Employee

Hello @Fannyrsy 

First let me thank you for posting and welcome to the ST Community.

You can find the VREFBUF mode configuration under System Core, SYS, VREFBUF Mode.

Thanks.

Mahmoud.

 

Fannyrsy
Associate II

Hello @Mahmoud Ben Romdhane,

Thank you a lot for your quick answer. This will help me a lot !