Ruben 게시 날짜 October 15, 2020
It looks like it is a debugging test point or a test probe.
Esmeralda 게시 날짜 October 15, 2020
The schematic diagram of ST can be seen by looking at the discovery board, which is the short circuit pad.
Alejandra 게시 날짜 October 15, 2020
It is a short-circuit cap, which is often used for debugging.
