Power-On Considerations - Power-On Considerations - UG860

When using the Spartan UltraScale+ FPGAs, review the following power-on considerations:

• Ensure the proper power-on behavior and guidelines from the Spartan UltraScale+ FPGA Data Sheet: DC and AC Switching Characteristics (DS930) are followed. See Power-On Reset for more information.
• Ensure the flash is powered up and ready to receive commands and/or clocks before the FPGA begins to send them. See Power-On Sequence Precautions for Flash for more information.
• Ensure that the POR_OVERRIDE pin is tied Low unless the application can meet the Spartan UltraScale+ FPGA Data Sheet: DC and AC Switching Characteristics (DS930) requirement to shorten the POR delay for a faster configuration time. See POR_OVERRIDE for more information.