Analog pins for digital input

[mister_e]

i never tested the above suggestion but it can work. But for safety sake i will turn them to digital.

Another solution...use ADCIN to read the pin.
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If result<XYZ => pin is LOW
if result>ABC => pin is HIGH.
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That will allow to determine your own HIGH/LOW threshold.

Just an idea.

[Charles Linquis]

I realize that I could just do a conversion to determine the pin's state, but I need to sit in a loop and look for a really short toggle.

The reason I have to configure it as analog is that the signal is connected to AN1, and I need to configure AN2 & AN3 as analog. The circuit is already built and I can't change the wiring.

I think the best solution is to do what Melanie suggested and configure the port as digital, read the pin, convert to analog, read channels 2&3, and switch back to digital.