I am trying understand the schematic for a Waveshare Core 407I board, with an STM32F407IGT6 MCu. What is the meaning of this schematic symbol (labelled COMP.J1 JPAD3)?
Link to full schematic: https://www.waveshare.com/w/upload/4/4a/XCore407I-Schematic.pdf
I've identified it on the board to be a blob of solder next to a square contact. What component is this if I were to draw it myself in an EDA program?