Вот попробуйте генератор (сам не пробовал) -
https://www.opalkelly.com/tools/fmceepromgenerator/Для KCU105 все есть в user guide
Цитата
• If no cards are attached to the FMC ports, the VADJ voltage is set to 1.8V.
• When one FMC card is attached, its I2C EEPROM is read to find a VADJ voltage
supported by both the KCU105 board and the FMC module within the available choices
of 1.8V, 1.5V, 1.2V, and 0.0V.
• When two FMC cards are attached with differing VADJ requirements, VADJ_1V8 is set to
the lowest value compatible with the KCU105 board and the FMC modules, within the
available choices of 1.8V, 1.5V, 1.2V, and 0.0V.
• If no valid information is found in the I2C EEPROM, the VADJ_1V8 rail is set to 0.0V.
Для прошлой серии плат был отдельный джампер на включение VADJ. Номинал может быть изменен с помощью программатора TI.
На платах текущей серии возможно ручное управление
https://www.xilinx.com/support/answers/67308.html .