You can specify technologies for each I/O bank by doing one of the following:
Using the I/O Bank Settings dialog box
Placing an I/O of a particular technology in an I/O bank that has not been assigned a voltage
Running the I/O Bank Assigner
Using the command set_iobank in a PDC file
You cannot change the I/O technology of an assigned I/O to an I/O technology that is incompatible with the bank. If you need to assign the I/O technology to a new technology, first unassign the I/O.