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Why ISR gets missed

Question asked by Smita Joshi on Jan 11, 2019
Latest reply on Jan 13, 2019 by Mark Butcher


We have configured MK60FN1M0VLQ12 Pin 3(PTE 2) as an input pin for interrupt via SPI interface. We have configured interrupt on rising edge. We see that ISR gets called 4 -5 times and after that ISR gets missed. And in oscilloscope we see that interrupt pin is HIGH.

What could be the issue? Why ISR gets missed out?

How to increase interrupt priority of PTE2? We have tried disabling other interrupts but the issue persist.