18F4550 running 3.3V (serin2) and 16F877 running 5v (serout2), is possible?


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    Default 18F4550 running 3.3V (serin2) and 16F877 running 5v (serout2), is possible?

    Hello all,

    Somebody knows solve it? I have a circuit based on 18f4550 as RX (serin2) using 3,3v as power, and other circuit using 18f877a running 5,0V. I puted a 1k resistor of the TX to the RX pins but sometimes the data fail. I thinnk that is necessary to use some converter. I alread put a divider resistor (15k and 10k without sucess.

    Pimentel
    Last edited by Pimentel; - 25th January 2014 at 18:35.

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