I’m designing a board using an stm32g030k and I am confused by the design of the symbol and footprint. Pin 21 and pin 19 are marked with an X and did not appear in the symbol. I edited the symbol to include them. Even after updating the PCB from the schematic the ‘X’ remains. Why? Even setting pin 19 to a new net does not replace the ‘X’. Is this expected behavior?
-A
did you connect the pin to something ? not just a small wire that goes no were on the schematic.
To have a net you need at least 2 connections.
When you edit the symbol, you must not only make the pins visible, but you must also change the Electrical Type from Unconnected to whatever is appropriate for your schematic.
I also had a brief look at the datasheet of this IC, and it puzzles me a bit why this pin is hidden and set to “unconnected” by default.
Screenshot made from page 29 of: file:///home/paul/downloads/stm32g030k6.pdf
No, not true. In my setup, open pins are treated as nets with a single pin, and get net names such as unconnected-(U1-PB2-Pad17). The “x” is for pins which have a no-connect flag, or as set as unconnected in the symbol itself.
You can also label a net with “x”, and then they look the same in the PCB editor as the unconnected pins, but KiCad can still keep them apart.
OK, that makes sense. I had only tried to create a net with the pin. Once I added additional components the correct net name showed up. But, yes, I find it odd that Pin 19 and Pin 21 are hidden by default.
Thank you for the reply.
-A
