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i.MX8M power-up sequence

Question asked by wei Liu on Jul 29, 2018
Latest reply on Jul 29, 2018 by Yuri Muhin

I have a question about the i.MX8M power-up sequence.In the spec “IMX8MDQLQCEC” on  page 25,it said "Turn on... VDD_DRAM",then "Turn on NVCC_XXX and NVCC_DRAM".When I researched the IMX8M demo design"MCIMX8M-EVK",I have found "VDD_DRAM" is connected to the pin SW3A/B of PMIC(MC34PF4210A1ES),"NVCC_DRAM" is connected to the pin SW2,according to the PMIC spec"PF4210" on page 17,I can see SW2 is powered before SW3A/B,so in the EVK design NVCC_DRAM is powered before VDD_DRAM?That does not match with the description in the spec “IMX8MDQLQCEC”,I cannot understand.