I have a custom board STM32WB55CGU6 with a reset pin connected to a pull-up resistor and a capacitor as shown in the schematic and PCB layout below (connected to the reset pin 7):
Using an oscilloscope, I obtained the following signal below between the resistor and capacitor of the reset as well as VCC:
Normally, from what I understand I am supposed to obtain a value of 3.3V at this point. I think that there is a problem with the capacitor but using a multimeter, I am able to obtain a value close to the actual value of the capacitor. Any other ideas on why I would have this?
UPDATE: After removing the pull up resistor as recommended, the signal remains the same.
Also, here is the full schematics. Please note that for the moment I have modified it slightly, changing the pins of PA13, PA14 to SWDIO and SWCLK respectively to test the PCB using a ST-Link V2.
In addition to this, I have weird signals in my SWCLK and SWDIO pins.