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Senior III
October 6, 2026
Solved

STM32WB55 UFQFPN48 ref design different pinout to KiCAD symbol

I trying to follow the UFQFPN48 reference design for a STM32WB55CGUx in KiCAD.
The ref design has some pinouts that don’t exist in the associated KiCAD symbol for the chip.

The ref design,

 

The KiCAD symbol with as much as I have wired up so far,

 

 So the branch in the orange box for example, in the refence design this should have a branch just above C13 going to VFBSMPS yet in the KiCAD symbol this is missing. also there is no RF0.

TDK
TDKBest answer
October 6, 2026

in the refence design this should have a branch just above C13 going to VFBSMPS yet in the KiCAD symbol this is missing

What’s missing? VFBSMPS is clearly there.

Make the connection. C13 and L3 are separate components. Move them to expose the green net wire, if that’s what you want.

 

RF0 is pin 22 which is there as well. Left side.

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2 replies

TDK
TDKBest answer
October 6, 2026

in the refence design this should have a branch just above C13 going to VFBSMPS yet in the KiCAD symbol this is missing

What’s missing? VFBSMPS is clearly there.

Make the connection. C13 and L3 are separate components. Move them to expose the green net wire, if that’s what you want.

 

RF0 is pin 22 which is there as well. Left side.

"If you feel a post has answered your question, please click ""Accept as Solution""."
Senior III
October 7, 2026

So it is, I’m an idiot, was the end of a very long day & got circuit blind. Also thanks for pointing out RF0 is the same as VSSRF.