pic16f88 & voltage

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  1. - 15th February 2009, 10:38 #1
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    Red face Bad way of asking the Question ... ( I think )


    >Which inputs do you use for Xbee ???

    pin 1 for 3.3Vcc
    pin 3 for input from RB5(tx) from pic
    Hi,

    I think I didn't write it correctly ...

    Which inputs of the PIC do you use for Xbee reading ...

    Alain
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    Why insist on using 32 Bits when you're not even able to deal with the first 8 ones ??? ehhhhhh ...
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    IF there is the word "Problem" in your question ...
    certainly the answer is " RTFM " or " RTFDataSheet " !!!
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  2. - 16th February 2009, 04:53 #2
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    Quote Originally Posted by Acetronics View Post
    Hi,

    I think I didn't write it correctly ...

    Which inputs of the PIC do you use for Xbee reading ...

    Alain
    no problem, i read backwards randomly at times, so maybe i mis-read the question.

    i use pin RB2(rx) is the only reading from the xbee currently.
  3. - 16th February 2009, 08:48 #3
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    Lightbulb

    Quote Originally Posted by rdxbam View Post
    no problem, i read backwards randomly at times, so maybe i mis-read the question.

    i use pin RB2(rx) is the only reading from the xbee currently.
    Hi,

    RB2 is then a Schmitt trigger Input ... if used for RX ...

    Can a 5v Powered schmitt Trigger input read 3v3 levels ??? ...

    Good Question !!!

    Alain
    ************************************************** ***********************
    Why insist on using 32 Bits when you're not even able to deal with the first 8 ones ??? ehhhhhh ...
    ************************************************** ***********************
    IF there is the word "Problem" in your question ...
    certainly the answer is " RTFM " or " RTFDataSheet " !!!
    *****************************************
  4. - 17th February 2009, 09:09 #4
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    Quote Originally Posted by Acetronics View Post
    Hi,

    RB2 is then a Schmitt trigger Input ... if used for RX ...

    Can a 5v Powered schmitt Trigger input read 3v3 levels ??? ...

    Good Question !!!

    Alain
    indeed, great question and prompts me to research more:

    via p#11 of the datasheet from http://ww1.microchip.com/downloads/e...doc/30487c.pdf ...

    i'm using pin RB2 as [I]nput and not using the buffer as a Schmitt trigger input. Pin RB2 as [I]nput is for ausart.

    the Schmitt trigger input would be for serial programming ICD or low voltage ICSP programming but not on pin RB2, unless for SPI data out, which in my case it is not.

    is that how you read it?

    thx
  5. - 17th February 2009, 09:14 #5
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    Quote Originally Posted by Acetronics View Post
    Hi,

    Can a 5v Powered schmitt Trigger input read 3v3 levels ??? ...

    [...]

    Alain
    on another board with a pic16f88 with RB2 reading from pin2 on the xbee sitting on a xbib-r-dev board, the data is read just fine. yes, RB2 can read 3.3v levels.
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