HXFO pin capacitance (Cpin)

[MURAKAMI KAZUHIRO]

nRF54LM20A: 

C_pin is the pin input capacitance on pins XC1 and XC2.

Could you provide the typical, maximum, and minimum values of Cpin?

This information is needed as a reference for external 32 MHz crystal tuning.

[Simonr]

Hi

Please see the OSCILLATORS chapter for how to calculate the load capacitance when using external capacitors:

When using external capacitors, the load capacitance (CL) is the total capacitance seen by the crystal across its terminals and is calculated by the equation above. C1 and C2 are the external capacitors. Cpcb1 and Cpcb2 are stray capacitance on the PCB. Cpin is the pin input capacitance on XC1 and XC2. When you use the external capacitors you should disable the internal capacitor by setting OSCILLATORS.XOSC32M.CONFIG.INTCAP to 0.

Best regards,

Simon

[MURAKAMI KAZUHIRO]

Hi

Based on the above equation, I would like to know the load capacitance (CL) for the maximum and minimum values of Cpin. Therefore, could you please provide the upper and lower limits of Cpin?
My understanding is that Cpin is different from the internal capacitor.