topic QN9080 utilizing a 32MHz external oscillator in Wireless MCU https://community.nxp.com/t5/Wireless-MCU/QN9080-utilizing-a-32MHz-external-oscillator/m-p/744563#M4227 <HTML><HEAD></HEAD><BODY><P>We would like to utilize an external crystal oscillator(TCXO) with the QN9080.&nbsp; Is this possible by simply driving the XTAL_IN pin with a 32MHz oscillator?</P></BODY></HTML> Wed, 28 Mar 2018 15:59:52 GMT giovanni 2018-03-28T15:59:52Z QN9080 utilizing a 32MHz external oscillator https://community.nxp.com/t5/Wireless-MCU/QN9080-utilizing-a-32MHz-external-oscillator/m-p/744563#M4227 <HTML><HEAD></HEAD><BODY><P>We would like to utilize an external crystal oscillator(TCXO) with the QN9080.&nbsp; Is this possible by simply driving the XTAL_IN pin with a 32MHz oscillator?</P></BODY></HTML> Wed, 28 Mar 2018 15:59:52 GMT https://community.nxp.com/t5/Wireless-MCU/QN9080-utilizing-a-32MHz-external-oscillator/m-p/744563#M4227 giovanni 2018-03-28T15:59:52Z Re: QN9080 utilizing a 32MHz external oscillator https://community.nxp.com/t5/Wireless-MCU/QN9080-utilizing-a-32MHz-external-oscillator/m-p/744564#M4228 <HTML><HEAD></HEAD><BODY><P>Hello Gary,</P><P></P><P>Please take a look at section&nbsp;<STRONG>5.4 Clock injection</STRONG> from the <A href="https://www.nxp.com/docs/en/nxp/application-notes/AN11996.pdf">QN908x Hardware Design Considerations</A>&nbsp;document.</P><P></P><P>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.<BR /> <BR />ANA_CTRL0[XTAL_MODE] must be set to the correct value as well for the clock input type.</P><P></P><P>Regards,</P><P>Gerardo</P></BODY></HTML> Mon, 02 Apr 2018 22:32:59 GMT https://community.nxp.com/t5/Wireless-MCU/QN9080-utilizing-a-32MHz-external-oscillator/m-p/744564#M4228 gerardo_rodriguez 2018-04-02T22:32:59Z