recently I have a project,use 40 GTHs,and the 690t suporrts 80 GTHs. Below is my parameters setting.
RX:line rate 6.25G;
internal data with:32bits;
PLL seletion:Quad PLL;
gth count:32 gths.
TX:line rate 5.0G;
gth count:40 gths.
But when I instanced the GTH IP core and implement the project,the bufg resource can not meet the device, and the MAP ERROR : TOO MANY COMPS OF TYPE "BUFG" TO FOUND TO FIT THIS DEVICE.
Design summary says the project uses 46 bufgs,but the device only has 32 bufgs.
And I check the gt_rxusrclk_source.v ,I found that RX IP core uses 33 bufgs and the TX IP core uses 11 bufgs.
So I have a question, 7 series family says 690T has 80 GTHs, I want to know how do I correctly use the GTH IP core and make the bufg resource meet my project ?
I was very impatient to the way to solve this question,and it is important for me to know why .
thank you very much.
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