12F683 internal pull up

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  1. - 26th July 2008, 19:22 #7
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    hvacrtech
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    Quote Originally Posted by Bruce View Post
    If you have internal pull-ups ON, and you're testing the input pin for logic 1, the only
    way your LED shoud NOT blink would be when GPIO.5 is pulled to ground.

    That way it been erratic behavior and You are right about that the led should not blink when GPIO.5 is opened. that way when I opened the path from ground, the led still blinks. After I added INTCON=0 to it, it behaves much better and dont blink when opened. When I closed the GPIO.5 to ground, the led did blink.

    I dont know why but added INTCON=0, system stablizes. Like other PIC I know dont have issues with out this configuration. Maybe it a requirement?
    Last edited by hvacrtech; - 26th July 2008 at 19:26.
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