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Can I count the number of pulse at 20MHz from a GPIO port with FRDM-K64F?

Question asked by Alessio Paolucci on Jan 20, 2015
Latest reply on Jan 22, 2015 by Alessio Paolucci

Good morning!

For the project of an acquisitor with k64 MCU, can be useful to count the number of adc conversion that I store in a FIFO memory.

The problem is if I can mesure the number of pulse of a 20MHz signal that I have in GPIO input with the port interrupt.

The k64 is setted for 120MHz of core clock and 60MHz of bus clock.


Do you think I can count pulses at this frequency with this micro?


Alessio Paolucci