If an XPIO/HDIO bank is unused, it is recommended to tie the relevant VCCO pins to ground while leaving the individual I/Os unconnected, with the exceptions of any bank with a DCI calibration pin (IO_VR_), such as banks 700, 800, 723, or 823. For banks with DCI pins and banks 500, 501, 502, and 503, refer to the following list for rules for powering and not powering:
- Banks with DCI pins (IO_VR_) should always be powered because they enable DCI calibration for all of the other XPIO banks.
- Bank 500 VCCO pins can be grounded if no MIO circuitry in that bank or system monitor circuitry is used.
- Bank 501 VCCO pins can be grounded if no MIO circuitry in that bank is used.
- Bank 502 VCCO pins can be ground if no MIO circuitry in that bank is used.
- Bank 503 VCCO pins should ALWAYS be powered to a valid voltage because they are used in the boot process.
Pins that are labeled as "NC" in the package file can either be left unconnected or tied to ground. See the Power Pin Definitions table in Versal Adaptive SoC Packaging and Pinouts Architecture Manual (AM013).