GND pour Layer 1 under HSE Crystal

[tejgrewal]

Hi there,

I have tried to search lot and read article by TI , ST electronics , microchip etc.

Some advice to have ground pour under the Crystal Oscillator and others say should not have it all , whom to trust and what is opinion about it?

Why and Why not ? Reason behind it ?

I shall be thankful for explanations.

Regards,
Tej

[robertferanec]

- Usually I do not have GND directly under oscillators, but often I have GND on the second layer - I have never had any problems with this.
- Also, I need to say, I do not route other signals directly under oscillator (they could pick up noise),
- but I do route signals under oscillators if there is GND layer between oscillator and signal.

I mostly read about not routing directly under oscillators, I am not sure if I have seen something about not having GND plane under oscillators.

What are they saying - why yes and why not?