Minimum Vcore for RC RevE
From MCEWiki
On RC Rev E, the minimum Vcore is dictated by TPS76718QPWP regulators, U33 and U31, that generate VRDD=1VD8+ of the ADC chip, and 1.8V for DDR circuitry, respectively. The regulator datasheet specifies Vin(min)=2.7V. With 0.2V of margin, we need Vcore(min)=2.9V.
Note that although DDR chips are not populated on RC Rev E2, but U31 regulator still powers up the FPGA IO banks dedicated to DDR IO.
