How can I perform TransFR operation in XO2 device?
The current Diamond version supports the TransFR operation. For a successful TransFR operation, the Enable_TransFR preference must be enabled in the diamond spreadsheet. This will set the Freeze_IO and the Freeze_MIB fuses which will hold the IOs buffers in the known state during re-configuration. During reconfiguration (i.e. issuing REFRESH or toggling PROGRAMN pin), the IOs will hold its previous state. Kindly note that there are no special settings required in the diamond programmer to support TransFR operation. The diamond programmer will just issue the refresh command. When you enable the \u201CEnable_TransFR\u201D preference in spreadsheet view, the default IO states will be \u201CLeave alone\u201D.