PIC voltage levels

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  1. - 2nd November 2005, 19:50 #1
    barkerben's Avatar
    barkerben Guest

    Default PIC voltage levels

    Hi,

    This is only slightly related to Picbasic...

    I have a PIC running of 3.3v in a circuit. I realise that the MCLR pin is connected, through a pull up resistor, to a 5v line. Both voltage lines share a common earth.

    Is this likely to cause problems? Are there any major disadvantages to just disabling the MCLR pin completely and leaving it floating?

    Thanks,

    Ben
  2. - 2nd November 2005, 21:06 #2
    barkerben's Avatar
    barkerben Guest

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    Hmmm...

    Page 131 of the data sheet:

    http://www.rennes.supelec.fr/ren/fi/...ocs/16f62x.pdf

    Seems to say that the disaprity is ok. The voltage on the MCLR pin can range from Vss-0.3 to Vss+14. So pulling it to 5v should not be a problem, even if the rest of the PIC is running of 3v3

    ben
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