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I/Os 3.3V if Micro powered at 1.8V?

Question asked by George Sosnowski on Oct 31, 2016
Latest reply on Oct 31, 2016 by Hui_Ma

We are using the MK22FN512CBP12R, powered at 1.8V. Was wondering if the I/Os would be tolerant in some configuration to operate with 3.3V levels? The pins we are connecting to are open drain 3.3V, so they would have pullups to 3.3V. Could the Kinetis 1.8V digital I/O be connetced in some configuration to operate correctly in this scenario, either as is or configured as open drain, as well?

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