STM32U0: Connection between OPAMP1_VOUT and internal ADC channel (ADC1_IN7 or 8) ?

[ssHan]

I'm designing a circuit to convert sensor values ​​to ADC using the STM32U073MC (LQFP-80).
Unfortunately, I'm new to the STM32U0 series.

I read the RM0503(Rev 4) Reference manual(page 427) and found that the OPAMP1_VOUT can be connected to ADC1_IN8.

However, I checked the datasheet's(DS14548 - Rev 2 - March 2024) port table(page 32/Table 12. STM32U073x8/B/C pin/ball definition) and it seems to be connected to ADC1_IN7.

1. Which information is correct? (ADC1_IN7 or ADC1_IN8)

2. Also, could you briefly explain how to make the desired connection using CubeMX provided by ST?

  - I wish configure VM_SEL bits as “inverting not externally connected” with CubeMX.

 

[MKANO.2]

Hello @ssHan 

For the first point  : 1/ I confirm that the datasheet is correct, and OPAMP1_VOUT can be connected to ADC1_IN7.  I will  raise internally the error in the RM for correction

For the second point : 2/ To configure the OPAMP, please refer to the example provided in the STM32Cube MCU Package for the STM32U0 series, which is available for the STM32U083C-DK board. Additionally, AN5306 offers a detailed explanation on implementing the OPAMP for STM32G4 series.

Best regards,

Mariem

[ssHan]

Thank you, Mariem. It was very helpful to me.