No-Connect Inconsistency

[jmk]

Thanks @retiredfeline , but the below comment by @craftyjon doesn’t help much.

@craftyjon

The other way to think about it is that “Free” pins can be routed through if it’s convenient on the PCB. There may also be “no connect” pins where it’s a bad idea to connect anything at all to the pad. But, for cases where the pad may be connected to anything without any bad effects, it can be useful to connect it to whatever net needs to be routed through the area so that you can route across the pad.

The comment doesn’t really give a Kicad definition of a “Free pad” or an “Unconnected pad”. I should add “Unspecified pad” to the list also.

Maybe Craftyjon, or someone else who knows, can give a Kicad definition for these three pins.