Hello everyone, I am using this forum a lot these days . I have another question. I am making PCB design with RP2040 and W5500 (First PCB design with chips). The RP2040 chip itself doesn't have AGND. I know the digital gnd is much more noiser that analog agnd. In real design (i couldn't do it yet) which one should I fallow ? I wanted to ask because I have no experience with either (GND or AGND ) .
1-)For example can I connected GHs_GND and CH_GND1 pins to GND instead of CGND? If I connect what will happen?( Will PCB work?)
In this design they connected. They are using ETH-POE, I am using RJ45 (HR91105A) are they different?
2-) I am using stepper motor driver but I willingly connect signal's pin and 5V to PCB. I will give power motor driver from another adapter (Switch mode adapter.) Will it be a problem if I use GND again?
3-) This question is off topic but does footprint matter when choosing a crystal (4-SMD or HC-49/US)? W5500 doesn't give crystal name so I am choosing. Does crystal matter I mean If I choose same frequency and calculate right capacitor for it, It will work right? Thank you.