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KW2x: XTAL (PTA19)

Question asked by Joseph Kissell on Dec 1, 2015
Latest reply on Dec 8, 2015 by Joseph Kissell

I'm using the KW2x MCU and am curious about using PTA19 as GPIO.


I'm using PTA18 as a modem CLK_OUT (MCU CLK_IN). This signal is running at 4MHz. Then my MCU is put into PEE mode to run at 48MHz.


According to everything I've read in the reference manual, I should be allowed to use PTA19 as a GPIO. However it is toggling states as if it were internally tied to a clocking signal. Does anyone know what steps I need to take to use PTA19 as a GPIO?


Note: I do have it configure as an INPUT with MUX ALT1.