STM32C071RxTxN PD4 power domain

laurencedv · ‎2025-04-29

Hello there, I see in the datasheet for the STM32C071Rx that the version N (with VDDIO) marks PD4 as supplied by the pin VDDIO in the figure 10:

But the table 12 doesn't marks it as a pin supplied by VDDIO but VDD instead:

Which is true? VDD or VDDIO?

Thanks

Peter BENSCH · ‎2025-04-29

Welcome @laurencedv, to the community!

This is worded a little awkwardly in the data sheet: In table 12, the column LQFP64 GP/N applies to both GP and N versions. The pin 54 you have marked is therefore FT for the GP version and FT_s for the N version. This is also shown in figure 10, where the footnote for the N version reads: ‘I/O supplied by VDDIO2’.

Does it answer your question?

Regards
/Peter

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View solution in original post

Peter BENSCH · ‎2025-04-29

Welcome @laurencedv, to the community!

This is worded a little awkwardly in the data sheet: In table 12, the column LQFP64 GP/N applies to both GP and N versions. The pin 54 you have marked is therefore FT for the GP version and FT_s for the N version. This is also shown in figure 10, where the footnote for the N version reads: ‘I/O supplied by VDDIO2’.

Does it answer your question?

Regards
/Peter

In order to give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.

laurencedv · ‎2025-05-01

Hi Peter,

Yes it does, thanks, hopefully will be helpful to others.

The confusing part is that all the others pins that are supplied by VDDIO2 are marked as FT_s in the table, ie PD3. Combined with PD4 being the last (on the edge) it made me doubt what I was seeing.

Thanks for your quick answer!