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

[kirusanthan]

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…..

[nikhiljain]

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..

[Dexter]

 

^{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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