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    Explain the programming steps of the counter and timer in 8051 micro controller ? - EngineersHub
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    Question
    Pisini Yagna Venkata Bhanu Pradeep
    6 months ago
    1 Answer(s) posted Write an answer 373
    Answer
    Read Mode
    Answer posted by Manish Matta
    5 months ago

    PROGRAMMING  STEPS OF THE COUNTER AND TIMER OF THE 8051 MICRO CONTROLLER :

    1. Load the TMOD register indicating which timer is used and which MOD is to be selected.

    2.               Load TL & TH with initial count values.

    3.               Start the timer.

    4.               Keep monitoring the TF flag come out of the loop when TF = 1.

    5.               Stop the timer.

    6.               Clear the TF flag to continue the next counting.

    7.               Again reload TH & TL.

    EXAMPLE PROGRAM:

             MOV TMOD,#o1H

    BACK: MOV TL0,#F2

              MOV TH0,#FFH

        CPL P1.0

        LCALL DELAY

       SJMP BACK

    DELAY: SETB TR0

    AGAIN: JNB TF0,AGAIN

    CLR TRO

    CLR TFO

    RET

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    Explain the programming steps of the counter and timer in 8051 micro controller ?
    X
    Explain the programming steps of the counter and timer in 8051 micro controller ?

    PROGRAMMING  STEPS OF THE COUNTER AND TIMER OF THE 8051 MICRO CONTROLLER :

    1. Load the TMOD register indicating which timer is used and which MOD is to be selected.

    2.               Load TL & TH with initial count values.

    3.               Start the timer.

    4.               Keep monitoring the TF flag come out of the loop when TF = 1.

    5.               Stop the timer.

    6.               Clear the TF flag to continue the next counting.

    7.               Again reload TH & TL.

    EXAMPLE PROGRAM:

             MOV TMOD,#o1H

    BACK: MOV TL0,#F2

              MOV TH0,#FFH

        CPL P1.0

        LCALL DELAY

       SJMP BACK

    DELAY: SETB TR0

    AGAIN: JNB TF0,AGAIN

    CLR TRO

    CLR TFO

    RET

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