RIPPLES IN SUPPLY OF FPGA_plz help

Questions:

Is it just the PLL section supply that ripples? If you don't use the the PLL section can you use the device ( with restricted clock capabilties )?

If it is the first time you try to activate the whole device some outputs may be short circuit or the supply can't source enough current for the whole device.

Do you use sperated supplies for the PLL section?

Are the PLL supplies decoupled close to the device?

Is the source impedance of the supplies low enough?

Did you accidentally create a resonance circuit to filter the supply your PLL section: EG used a relative high Q inductor ( 10 uH || 100nf+10nF )? In that case you can just replace the inductor with a ferrite!

Succes with debugging,

Andries