Kinetis MicrocontrollersのトピックHelp: Is it possible to use the internal load capacitor in all oscillator modes? https://community.nxp.com/t5/Kinetis-Microcontrollers/Help-Is-it-possible-to-use-the-internal-load-capacitor-in-all/m-p/292128#M11744 <HTML><HEAD></HEAD><BODY><P>I would like to use the&nbsp; internal load capacitor in all oscillator modes.</P><P></P><P>Is it possible to use the internal load capacitor in all oscillator modes or are they disabled in all modes except&nbsp; "Low-frequency (32 kHz), low-power"?</P><P></P><P>Reference manual says:</P><P></P><P><EM>When using low-frequency, low-power mode, the only external component is the</EM></P><P><EM>crystal or ceramic resonator itself. In the other oscillator modes, load capacitors (Cx, Cy)</EM></P><P><EM>and feedback resistor (RF) <STRONG>are required</STRONG>.</EM></P><P><SPAN class="mce_paste_marker"></SPAN></P><P></P><P>If the crystal requires a 18pF load capacitor. Can't I use the internal load capacitor? It goes all the way from 0pF to 30pF.</P></BODY></HTML> Fri, 14 Jun 2013 09:16:20 GMT markosiponen 2013-06-14T09:16:20Z Help: Is it possible to use the internal load capacitor in all oscillator modes? https://community.nxp.com/t5/Kinetis-Microcontrollers/Help-Is-it-possible-to-use-the-internal-load-capacitor-in-all/m-p/292128#M11744 <HTML><HEAD></HEAD><BODY><P>I would like to use the&nbsp; internal load capacitor in all oscillator modes.</P><P></P><P>Is it possible to use the internal load capacitor in all oscillator modes or are they disabled in all modes except&nbsp; "Low-frequency (32 kHz), low-power"?</P><P></P><P>Reference manual says:</P><P></P><P><EM>When using low-frequency, low-power mode, the only external component is the</EM></P><P><EM>crystal or ceramic resonator itself. In the other oscillator modes, load capacitors (Cx, Cy)</EM></P><P><EM>and feedback resistor (RF) <STRONG>are required</STRONG>.</EM></P><P><SPAN class="mce_paste_marker"></SPAN></P><P></P><P>If the crystal requires a 18pF load capacitor. Can't I use the internal load capacitor? It goes all the way from 0pF to 30pF.</P></BODY></HTML> Fri, 14 Jun 2013 09:16:20 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/Help-Is-it-possible-to-use-the-internal-load-capacitor-in-all/m-p/292128#M11744 markosiponen 2013-06-14T09:16:20Z Re: Help: Is it possible to use the internal load capacitor in all oscillator modes? https://community.nxp.com/t5/Kinetis-Microcontrollers/Help-Is-it-possible-to-use-the-internal-load-capacitor-in-all/m-p/292129#M11745 <HTML><HEAD></HEAD><BODY><P>Yes, the internal load capacitors are available in all oscillator modes, only the internal feedback resistor disabled in all the modes except low power mode, so if the crystal only requires a 18pF load capacitor, internal capacitor should be enough, external capacitor is needed when the required load capacitors are greater than 30 pF.</P></BODY></HTML> Mon, 17 Jun 2013 07:20:00 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/Help-Is-it-possible-to-use-the-internal-load-capacitor-in-all/m-p/292129#M11745 Kan_Li 2013-06-17T07:20:00Z