Cpin values ​​for XC1 ,XC2

I will calculate the capacitance of the external capacitors for the 32 MHz oscillator circuit, but the values of the Cpin for XC1 and XC2 are not specified in the the datasheet V1.0.
Could you please tell me the capacitance of the XC1 and XC2 Cpin? Are they the same as XCL1 and XCL2, which are 3 pF (Typ)?

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  • Hi, 

    Can you clarify a few terms here?
    1. "the external capacitors for the 32 MHz oscillator circuit" which capacitance are you referring to? Please use designation from datasheet.
    2. "XCL1 and XCL2, which are 3 pF (Typ)" - where in the Nordic's document do you find these parameters? Can you please give me a link?

  • I would like to know the Cpin values of XC1 and XC2.


    1. ”The external capacitors” refer to C1 and C2 in the equation shown in Figure 15: Load capacitance equation for external capacitors under Section 5.5.1.1 Using external capacitors of the datasheet.

    2.Sorry, XCL1 and XCL2 were incorrect; the correct names are XL1 and XL2.
    The Cpin values for XL1 and XL2 are listed in Section 11.9.2 32.768 kHz crystal oscillator (LFXO).

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  • I would like to know the Cpin values of XC1 and XC2.


    1. ”The external capacitors” refer to C1 and C2 in the equation shown in Figure 15: Load capacitance equation for external capacitors under Section 5.5.1.1 Using external capacitors of the datasheet.

    2.Sorry, XCL1 and XCL2 were incorrect; the correct names are XL1 and XL2.
    The Cpin values for XL1 and XL2 are listed in Section 11.9.2 32.768 kHz crystal oscillator (LFXO).

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