Does anyone know the function of pins L2 N12 L13 C13 A5 on the MAX 10 U169 package? (e.g. part# 10M16SAU169)
Altera's pin description files leave the associated lines essentially blank. The Quartus pin planner shows them as a 'D' with a circle around it, but I don't know what that means either, and there are other pins with actual names (JTAGEN, CONFIG_SEL) with the same symbol.
In particular I am trying to do a PCB layout and would like to know whether they can be connected to VCC, or ground, or used as an IO. Or is there another function?