a question regarding the use of pins PF11, PF12, PF13, and PF14 as ADC inputs.

[RongShengWang]

Dear ST Support,

I am using the Nucleo-H753ZI development board (MB1364, STM32H753ZIT6) and have a question regarding the use of pins PF11, PF12, PF13, and PF14 as ADC inputs.

According to the UM2407 User Manual, these pins are stated as not usable for ADC input on this board. However, when reviewing the schematic (MB1364-H753ZI-C01), these pins appear to be free of any conflicting components or functions, and they are shown as connected to ADC-capable channels on the STM32H753ZIT6 (e.g., ADC1_INP2, ADC1_INP6, etc.).

Could you please clarify the following:

1. Are PF11–PF14 officially supported for ADC input on the Nucleo-H753ZI (MB1364)?
2. If not, what is the reason for the restriction in UM2407 — is it due to silicon limitations, board layout, or other design constraints?
3. Is there a specific board revision or condition under which these pins can be used safely as ADC inputs?

I would appreciate your guidance, as I need to use as many ADC inputs as possible for my application, and these pins would be very helpful if usable.

Best regards,

[AScha.3]

Hi,

i think its about the Arduino connector, there the PF11..14 are not connected, so cannot be used:

So try using them on connection to CN12 pins :

+

About the low level resolution on these ADC pins (and others also) you just have to try it .

There might be some capacitive stray in , as always possible (depends on layout, use of close pins etc.).

If you think, you can do it better, you have to make your own board, optimized for ADC performance.

[PeterWangPTD]

Thanks

My question was about the contradiction between  UM2407 User Manual and the Nucleo-H753ZI schematics why those pins are different from the rest ADC input pins?

[PeterWangPTD]

PF11 is connected to CN12-56.

I am able to configure it as ADC1 INP2. Why these pins are stated as not usable for ADC input on this board in UM2407 User Manual? Also CubeMX allows it. 

Thanks