2021-10-08 12:47 AM
2021-10-08 12:49 AM
If i were you i would show also the PCB routing, if this is a stepper motor driver board the way you route the ground is not trivial.
And maybe use some names? "U?" "P?" doesnt give me a lot of info
2021-10-08 01:20 AM
please add a 2.2uF or 4.7uF capacitor closed to MCU power pin (VDD/VCC). you may refer F303 EVAL or Nucleo board on ST website for the MCU system.
2021-10-08 07:22 AM
NRST needs a 0.1uF to ground, should also be broken out to the debug header IMO.
Debug header should include a ground signal.