Spartan 6 GTP Filters

[dguisinger]

I've been reading the Spartan 6 LXT series GTP guide.

I've noticed the power supply requirements seem to have eased up over the Virtex-5 and I'm looking for some verification.

The difference I am seeing is the power supply filters.

The bypass caps are in the GTP guide, but the inductors on each pin are gone.  This would greatly simplify the routing in areas of the board that are already crowded.  Is this a mistake in the guide?  Or can I really get by with not having these as part of the filters?

Thanks,

Dan 

[mcgett]

Yes, the power supply requirements have been relaxed, but you still need to pay close attention to the noise levels of the MGT power supplies as it will directly impact the performance.

[dguisinger]

Thanks.

Out of the different supply pins, are there any you would recommend leaving the V5 style filtering on for extra stability?