IOC on a ACD pin ?

[longpole001]

but would that not work if i was looking for a analog change not a logic change ?

[Jerson]

Obviously not. You cannot have an interrupt on analog change.

[mark_s]

Hello,
You did not mention which pic you are using? Many pics have comparator modules connected to the analog pins. These can generate interrupts on change by setting the reference voltage to your desired trigger level.
Just an idea, depending on your specific pic and available pins.