01-21-2021 06:28 AM
I'm getting the mapping error below:
Pack:1107 - Pack was unable to combine the symbols listed below into a single IOB component because the site type selected is not compatible. The component already has an input slave buffer.
There is no more information, I've selected to generate detailed map report and the .mrp file doesn't give me anything more than this. How do I go about finding what's causing this? Going by what I've read in other posts, there should be a 'Further Information' section, but it's not there for me. Is there another way I can validate my ucf file maybe?
Using ISE 14.7, device XC4VLX80-10FF1148
01-21-2021 06:56 AM
It doesn't give you any information about the pin or the ports invovled?
My best guess is that you are trying to place a differential pin on the P side of a pair where the N side is assigned to a different signal (either a single ended signal or a different differential pair).
It is also possible that it is some other combination of resources that need "master/slave" pairs; like the ISERDES/OSERDES with "Width expansion" - if you have an ISERDES/OSERDES that needs width expansion and the other P/N pair is used (so the ISERDES/OSERDES is not available) then you could get a message like this.