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?