Hello Laboratori, I can also see that by default NMI is only enabled for stack pointer monitor (in ThreadX applications) interrupt. Set R_ICU->NMIER_b.NMIEN to 1 and the NMI should be enabled. In your callback, make sure to perform R_ICU->NMICLR_b.NMICLR = 1; in order to clear the interrupt flag once you finished processing. Regards
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