Are Pic pins normally LOW when the PIC is un-powered??


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    Default Re: Are Pic pins normally LOW when the PIC is un-powered??

    Yeah, I have the PIC running off of 5V for Vdd.
    I did the calculation for the LED current limit resistor to take into account the 12V (using a 2700 ohm resistor) for approx 5ma LED current.

    I thought the PIC could just be a source of Gnd (LOW) when I wanted to turn the LED on.

    I had assumed that the port pins would be in a High Impedance state when powered down, and until configured otherwise.
    Guess I'll have to insert a transistor in the ckt to control the LED.

    Anybody else had any experience with how the I/O pins behave when the PIC is powered down??

    thanks
    Last edited by Heckler; - 21st February 2014 at 23:35.
    Dwight
    These PIC's are like intricate puzzles just waiting for one to discover their secrets and MASTER their capabilities.

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