Re: [Discuss-gnuradio] Re: interfacing a DSP array card to USRP2

[Matt Ettus]

> My understanding is that it takes 3 BUFGs and one DCM for tri-mode (maybe one 
> more of each for RGMII support but I
> don't see that) and, between this and other USRP2 needs, you ran into the limit 
> of 8.  Is that accurate?  Or would
> 10/100/1000 support would take more than 3...

I can't say how many clocks a _good_ 10/100/1G system would need, but 
the Opencore required 4.  One thing to keep in mind is that while there 
are theoretically 8 global clocks in the S3, other limitations mean that 
it can be difficult to use all 8.

Matt