VREFBUFF option is not available in CubeMx for STM32G4

[abhijith_raj]

Question moved from this post.

Hi @mƎALLEm ,
I am using STMCubeIDE with cubeMX, in that there is no such configuration for VREFBUF. is there any alternative way for that?

[mƎALLEm]

Hello,

According to the datasheet STM32G491RET6 features an internal voltage reference buffer (VREFBUF)

It seems VREFBUF option is missing in CubeMx. I will escalate internally for analysis and eventual fix in the tool (internal ticket number 225569 for follow-up).

Try to add this code in the User code section (inspired from H7 generated code): scale set to 0 (2.5V)

  /** Configure the internal voltage reference buffer voltage scale
  */
  HAL_SYSCFG_VREFBUF_VoltageScalingConfig(SYSCFG_VREFBUF_VOLTAGE_SCALE0);

  /** Enable the Internal Voltage Reference buffer
  */
  HAL_SYSCFG_EnableVREFBUF();

  /** Configure the internal voltage reference buffer high impedance mode
  */
  HAL_SYSCFG_VREFBUF_HighImpedanceConfig(SYSCFG_VREFBUF_HIGH_IMPEDANCE_DISABLE);