I would like to ask please about I/O standard because I have no experience with these interfaces. For example, in attahced shot, this is difference between LVDS and CMOS technologies. I can see also from user guide 471 page 99 that for example LVDS_25 and LVCMOS_25 are placed in HR Bank. What I know also is we can choose which logic family in constraint files (UCF for instance).
My question is, How changing the IOstandard in the UCF file can change the logic family connected to the IO PAD (Do we have each logic family connected to the PAD or is it switching techniques, etc). I am asking because each logic family has its own architecture and configuration so I can't imagine how choosing the IOstandard in UCF file can assign the needed logic family