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Low Voltage Warning interrupt doesn't trigger at configured trip point. Kinetis MK02FN128VFM10.

Question asked by Matthew King on Mar 19, 2019
Latest reply on Mar 21, 2019 by Matthew King

I am using the LVW interrupt in register PMC_LVDSC2 to quickly identify brown-out/power down scenarios.

I am using the "Low-voltage warning thresholds — high range", and have tried each of the 4 possible trip points within the high range: 2.7V, 2.8V, 2.9V, 2.3V. 

The microcontroller does detect the low voltage event, but always at 2.38V (+/- .02V), regardless of the configured trip point. I know this because I toggle an I/O pin when the ISR fires, and I see the supply voltage to the MCU at the time the I/O toggles.

Is there a known errata on the LVW interrupt trip point voltage?

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