The data sheet states, "When operating in three-supply mode, the 1.8-V VDDA1P8 supply must be stable within 25 ms of the 2.5-V VDDA2P5 supply ramping up. There is no sequencing requirement for other supplies when operating in threesupply mode." Is it okay to lamp VDDA1P8 before VDDA2P5?