16F690 MCLR as Input

[jackberg1]

many thanks Henrik to clarify this post.

that make more sense to me now with further test, when the pin RA3
has nothing connected to it, the input is floating thus
when adding a pulldown it's state is stable.


I found from the datasheet a diagram of the MCLR input circuit, my guess is the red line indicate the path of the input configuration.