We would like to utilize an external crystal oscillator(TCXO) with the QN9080. Is this possible by simply driving the XTAL_IN pin with a 32MHz oscillator?
Please take a look at section 5.4 Clock injection from the QN908x Hardware Design Considerations document.
There's an update pending for the app note though if using a square wave input. A 1nF capacitor should be added in series with the XTAL_IN input. This is to reduce the current draw that might otherwise occur. ANA_CTRL0[XTAL_MODE] must be set to the correct value as well for the clock input type.
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