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Unable to program KL03 below 2.7VDC

Question asked by Andrew Boss on Jan 3, 2019
Latest reply on Jan 7, 2019 by Jing Pan

In conjunction with Kinetis Design Studio, I am using a Multilink Universal device to program NXP MKL03Z32CAFR MCUs that are powered off of a 2.1 V supply in my design. I am getting a P&E Connection Assistant message when my MCU is powered from 2.1 V, and cannot program the MCU. When the MCU is powered at 3 V, I do not get the error and can successfully program the MCU.

The only way I am able to program my MCU at 2.1V is to first use the Kinetis Recovery Tool utility to halt the processor.

Are there other flash algorithms that will automatically halt the processor immediately upon startup? Any suggestions would be helpful.