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Are the interrupts of the Kinetis K20 preemptive?

Question asked by David Graham on Sep 17, 2015
Latest reply on Sep 18, 2015 by David Graham

I am running a K20 72 MHz MCU on a prototype board we that have
developed. I have a UART interrupt and a PORTA GPIO pin interrupt. Both interrupts
are working well but they are Tail-Chaining. The application requires the PORTA
interrupt to preempt the UART interrupt. I have tried many NVICIP register settings
to no avail. Any help or hints greatly appreciated.


Keil compiler

PE micro Multilink FX debugger