1.10 Obtaining a Two-Rail Design for Non-SerDes Applications

SmartFusion 2/IGLOO 2 devices need multiple power supplies for functional operation, programming, and high-speed serial interfaces. It is possible to design an application with only two voltage rails using SmartFusion2/IGLOO2 devices.

I/O banks in SmartFusion2 and IGLOO2 devices support a wide range of I/O standards. I/O bank supplies can operate at 1.2V, 1.5V, 1.8V, 2.5V, or 3.3V. To obtain a two-voltage-rail design, the core voltage must be connected to 1.2V, and the mandatory I/O bank supplies and VPP supplies can be connected to 2.5V or 3.3V.