Required Information - 2023.2 English

UltraFast Design Methodology Guide for FPGAs and SoCs (UG949)

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2023.2 English

For the tools to work effectively, you must provide as much information about the I/O characteristics and topologies as possible. You must specify the electrical characteristics, including the I/O standard, drive, slew, and direction of the I/O.

You must also take into account all other relevant information, including clock topology and timing constraints. Clocking choices in particular can have a significant influence on pinout selection, and vice versa.

For IP that have I/O requirements, such as transceivers, PCIe, and memory interfaces, you must configure the IP prior to completing I/O pin assignment. For more information on specifying the electrical characteristics for an I/O, see this link in the Vivado Design Suite User Guide: I/O and Clock Planning (UG899).