LPC MicrocontrollersのトピックLPC824 - EMI from external crystal https://community.nxp.com/t5/LPC-Microcontrollers/LPC824-EMI-from-external-crystal/m-p/1083550#M41628 <HTML><HEAD></HEAD><BODY><P>With earlier constructions with other MCUs, I have had the problem that RF emissions from crystal oscillator has been too high for approval. One way of fixing this is to have a series resistor (~1K) between XTALOUT and the crystal in order to lower oscillation amplitude. Does anybody has any experience about that? </P><P></P><P>Kurt Mirdell</P></BODY></HTML> Wed, 12 Aug 2020 07:33:01 GMT kurtmirdell 2020-08-12T07:33:01Z LPC824 - EMI from external crystal https://community.nxp.com/t5/LPC-Microcontrollers/LPC824-EMI-from-external-crystal/m-p/1083550#M41628 <HTML><HEAD></HEAD><BODY><P>With earlier constructions with other MCUs, I have had the problem that RF emissions from crystal oscillator has been too high for approval. One way of fixing this is to have a series resistor (~1K) between XTALOUT and the crystal in order to lower oscillation amplitude. Does anybody has any experience about that? </P><P></P><P>Kurt Mirdell</P></BODY></HTML> Wed, 12 Aug 2020 07:33:01 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPC824-EMI-from-external-crystal/m-p/1083550#M41628 kurtmirdell 2020-08-12T07:33:01Z Re: LPC824 - EMI from external crystal https://community.nxp.com/t5/LPC-Microcontrollers/LPC824-EMI-from-external-crystal/m-p/1083551#M41629 <HTML><HEAD></HEAD><BODY><P>Hi</P><P>Maybe this application note can help you.</P><P><A class="link-titled" href="https://www.nxp.com/docs/en/application-note/AN3208.pdf" title="https://www.nxp.com/docs/en/application-note/AN3208.pdf">https://www.nxp.com/docs/en/application-note/AN3208.pdf</A>&nbsp;</P><P>Have a good day</P></BODY></HTML> Wed, 12 Aug 2020 18:32:57 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPC824-EMI-from-external-crystal/m-p/1083551#M41629 vicentegomez 2020-08-12T18:32:57Z Re: LPC824 - EMI from external crystal https://community.nxp.com/t5/LPC-Microcontrollers/LPC824-EMI-from-external-crystal/m-p/1083552#M41630 <HTML><HEAD></HEAD><BODY><P>Thank you very much for an interesting application note. I would love if there was more material like this for current ICs. However, there was not so much about EMI in it.</P><P></P><P>Kurt Mirdell</P></BODY></HTML> Wed, 12 Aug 2020 19:51:52 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPC824-EMI-from-external-crystal/m-p/1083552#M41630 kurtmirdell 2020-08-12T19:51:52Z