Description
For Stratix® 10 devices, POD-12, SSTL-12, HSTL-12 Class I and Class II are I/O standards that support internal VREF. However, the internal VREF is only available for External Memory Interface (EMIF) use cases.
Resolution
Different applications or protocols will have different options of I/O standards available that support Internal VREF. More information about this can be found in the External Memory Interfaces Stratix® 10 FPGA IP User Guide.