The MVIO feature allows a subset of the I/O pins to be powered by a different I/O voltage domain than the rest of the I/O pins. This eliminates the need to have external level shifters for communication or control of external components running on a different voltage level. Eliminating external logic level shifters will, in turn, reduce the BOM and free up PCB space.
Figure 1. Multi-Voltage I/O Replacing External Logic Level Converters
Note: For more details and code example,
refer to TB3287 - Getting Started with MVIO.