16f628a porta.5 as input

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  1. - 29th October 2009, 15:52 #1
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    naga
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    Default 16f628a porta.5 as input

    HI ALL,
    Using portb as output : working well.
    Using porta.0 to 7 except porta.4 & 5 as input with pull-up resistor working well with 0v trigger, Can i use also a pull-up resistor to porta.4 &5? or do i need to use pull-down resistor then trigger with +5v input.. Looking for help before messing up my IC.( didn't try yet,)
    Thanks.
  2. - 29th October 2009, 16:03 #2
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    you should be able to wire the resistor as a pullup or pulldown depending on what your input signal is.
  3. - 29th October 2009, 20:18 #3
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    Lightbulb

    Hi, Naga

    you can always use pullup or pulldown with inputs ...

    But take care to PORTA.4 and 5 ... They're not protected against voltage over VDD !!! ( see Datasheet p 33 ...)

    Alain
    Last edited by Acetronics2; - 29th October 2009 at 20:23.
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  4. - 31st October 2009, 12:04 #4
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    Thanks to all, Is there any way that can porta.5 be used as output?..Thanx again.
  5. - 31st October 2009, 12:18 #5
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    Wink

    Hi,

    The only way is to use it as output is as an OPEN Collector output ...

    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 " !!!
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