Hello Luigi,
The chip of "MK61Fx512" is 512 flash , why do you use the 1M flash ?
The attach project is about one timer interrupt project ,
- The one of "k61fx512_isr_nope_isr" is about bare board project , when you run it , you can see the
variable of "testcnt" increased :

- The project of "MK61Fx512_isr_test" is one project with Processor Expert (PE), the PE
project is when you create project select this :

Have a great day,
Alice Yang
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