Channel limit

Questions and discussions about the Xillybus IP core and drivers

Channel limit

Postby Guest »

Hi,
Is there a limit of how many channels(device files) I can create in IP factory?
For example can I create 128 of them? Or 1024?
Guest
 

Re: Channel limit

Postby support »

Hello,

In principle, there is no limit. In practice, the limit is dictated by the amount of logic that the FPGA can take (usually there's also application logic that does something with the data) and meeting timing constraints: The multiplexing elements in the IP core get larger, and therefore slower, as the number of streams rises. This is relevant in particular on FPGAs with a bus_clk of 250 MHz.

Actual tests have been done with around 60 streams on SP605 (Spartan-6 LX45T) for example. But it's possible to go higher if required on larger devices.

Regards,
Eli
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Re: Channel limit

Postby Guest »

Thank you for reply,
I'm using Xilinx Virtex-7 FPGA VC707 Evaluation Kit so it is 250 MHz.
Currently I have 2 downstreams and 8 upstreams and it's working fine. I'll add more upstreams and see what will happen :)
Guest
 


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