1. All PI ports VOL and VOH fail. Some PC ports have individual VOL and VOH fail.
2. The network port is not working
If there are GD32 engineers who see this post, please tell me if there is such a pr
In AD, if you want to avoid green paint inside the circle on the top surface of the circuit board, should you draw a solid circle or a ring on the TOPSOLDER layer? As shown in the figure below
For battery-powered products, if you want to determine whether the GND voltage of the entire board is very stable, that is, similar to the 220V neutral line, which is originally 0V, and some neutral l