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GPIO Filter (enabled with PFE)

Question asked by Yves B on Jul 29, 2014
Latest reply on Jul 30, 2014 by Adrian Cano



in the ref manual of the K20 series, I found the following sentence very confusing:

A low pass filter of 10 MHz to 30 MHz bandwidth.

could someone please tell me what is the exact nature of the input filter activated with PORTx_PCRn register bit PFE?

(band pass of 10MHz to 30MHz bandwidth or low pass with 10MHz to 30MHz cutoff frequency)