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i.MX RT1050 NVCC_SD0 operating conditions

Question asked by Brian Han on Jun 24, 2020
Latest reply on Jun 29, 2020 by Brian Han


I need to control several ICs with i.MX RT 1050 and most of the I/Os are on 3.3V, but I have 3 pins that I have to control using 1.8V.

So rather than level shifting i/MX RT's 3.3V to 1.8V, I was thinking of using the NVCC_SD0 bank (GPIO_SD_B0_00~05) as the 1.8V GPIO controller.

I intuitively think this should work without a problem, but I couldn't find any warnings that I can mix up 3.3V and 1.8V supplies for each GPIO NVCC.

Do I have to match all the voltage levels for all NVCC_XX?

IMXRT1050CEC Datasheet


Thank You