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When using the external RC oscillator, how can the frequency accuracy be determined?

April 26, 2017external Frequency oscillator RC

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When using the external RC oscillator, how can the frequency accuracy be determined?

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Answer The external RC circuit is connected to the OSC1 pin and the OSC2 pin is a floating output. The frequency of the internal RC oscillator can be measured on pin OSC2 with an oscilloscope. The frequency measured will be Fsys/4.