Generation problem

[dmairspotter]

Have you got your oscillator mode set right? I think it is HS for crystal..don't have my documaentation in front of me but I have had trouble with forgetting this.

[vladimir059@hot]

Hello, thank you everybody for replies.
Yes, I downloaded program into PIC controller, and I‘m 100% sure there is not generation , because if I use external source of oscillation controller wakes up and works properly. I think my prototype PCB isn’t good and there are some parasitic influence between components. What are there general rules exist for placing components around PIC controller?
Vladimir

[Archangel]

Hi Vladimir,
Running at 4 MHZ you should not have too many RF issues as the frequency is so low. When you program the chip - make sure the programmer is set to " XT " for 4 mhz if it is set to " HS "or " RC" it will not oscillate with a resonator or crystal. Since 4 MHZ is the default speed for this chip I do not believe you need to DEFINE it in the code, I never have for 4 mhz and they always work. Also make sure no other loads are attached to pins 15 or 16, just the crystal and 22pf caps.
I Hope this helps.
JS