Use the Location attribute in the Pads module (Pad Loc) to place I/O modules in a specific IOB location.
To assign a location to a specific bit, precede the location with a bit identifier. You can assign multiple bits by using a period as a separator. For example, with a bus width of 8 bits, you could specify the following assignment in the Pad Loc field.
0:P44.2:P45.7:P46
This specification assigns bit 0 to pad 44, bit 2 to pad 45, and bit 7 to pad 46. Note that all of the bit positions do not need to be specified.
Commas will not work as separators between bit assignments.
