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You are here: Home / Topics / related I/O pins operations of 8051……..

related I/O pins operations of 8051……..

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Microcontroller › 8051 › related I/O pins operations of 8051……..

  • This topic has 2 replies, 3 voices, and was last updated 13 years, 6 months ago by Dexter.
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  • December 17, 2011 at 8:07 am #1448
    kirusanthan
    Participant

    hi friends i have doubt on i/o pins configuration of 8051.when i am writing embedded c program for selecting the single bit code sbit led=P1^0; like that for selecting all port0 pin means sfr led=0x80;… but my doubt on first im selecting all port pin using sfr then how i selecting particular pin example P0.1 form that sfr port for read and write…..

    December 30, 2011 at 10:32 am #6969
    nikhiljain
    Participant

    you can use either of the one operation. If you are using SFR u are using the entire 8 bits as a byte. When you are using sbit u are using only the corresponding bit..

     

    Using both for the same port in the program may produce logical error if not the syntax error..

    December 30, 2011 at 1:28 pm #6972
    Dexter
    Participant

     

    what nikhiljain said is correct .

     

    Using both for the same port in the program may produce logical error if not the syntax error..

     

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