How to impliment This

I want to build circut with 8051 micro controller which detects whether Clock signal is available or not ie I want to detect Clock signal is presetnt or not how to or not do this .

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  • What clock signal?

    What processor?

    Please spend time writing long questions, to avoid that people have to guess what you mean.

    Do you mean that you want to verify that an crystal oscillator is working and has stabilized before you switch from an RC oscillator? Or where you thinking about an real-time clock? Or something else?

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  • What clock signal?

    What processor?

    Please spend time writing long questions, to avoid that people have to guess what you mean.

    Do you mean that you want to verify that an crystal oscillator is working and has stabilized before you switch from an RC oscillator? Or where you thinking about an real-time clock? Or something else?

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