LPC MicrocontrollersのトピックRe: LPC824M201JHI33 use without oscillator https://community.nxp.com/t5/LPC-Microcontrollers/LPC824M201JHI33-use-without-oscillator/m-p/829039#M33114 <HTML><HEAD></HEAD><BODY><P>Hello&nbsp;<A _jive_internal="true" data-content-finding="Community" data-userid="324103" data-username="daniel@herasys.com" href="https://community.nxp.com/people/daniel@herasys.com">Daniel Brown</A>,&nbsp;</P><P></P><P>In the user manual of the LPC824 (<A class="link-titled" href="https://www.nxp.com/docs/en/user-guide/UM10800.pdf" title="https://www.nxp.com/docs/en/user-guide/UM10800.pdf">https://www.nxp.com/docs/en/user-guide/UM10800.pdf</A>) under section 5.3.2 you can find the following information.&nbsp;</P><P><span class="lia-inline-image-display-wrapper" image-alt="pastedImage_4.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/27046iA014BF0B34DB4265/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_4.png" alt="pastedImage_4.png" /></span></P><P>So, you can definitely use the internal oscillator as the main clock. The development board for the LPC824 (<A class="link-titled" href="https://www.nxp.com/support/developer-resources/hardware-development-tools/lpcxpresso-boards/lpcxpresso824-max-board-for-lpc82x-family-mcus:OM13071" title="https://www.nxp.com/support/developer-resources/hardware-development-tools/lpcxpresso-boards/lpcxpresso824-max-board-for-lpc82x-family-mcus:OM13071">LPCXpresso824-MAX Board for LPC82x family MCUs|NXP</A>&nbsp;) actually uses the IRC in all the examples that we provide (Code Bundle, LPCOpen and SDK) as the input for the PLL and the output of the PLL is the source of the main clock.</P><P></P><DIV><DIV><P>Hope it helps!</P><P>Victor.</P><P>-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></DIV></DIV><P><SPAN class="" data-display-overall="true" data-helpful-count="1" data-object-id="1039508" data-object-type="2" data-overall-count="1" style="color: #138700; background-color: #ffffff; border: 0px; font-size: 14px;"></SPAN>&nbsp;</P></BODY></HTML> Wed, 08 Aug 2018 15:55:39 GMT victorjimenez 2018-08-08T15:55:39Z LPC824M201JHI33 use without oscillator https://community.nxp.com/t5/LPC-Microcontrollers/LPC824M201JHI33-use-without-oscillator/m-p/829038#M33113 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P>Just wondering if the&nbsp;<A>LPC824M201JHI33 microcontroller can be used without an external crystal or oscillator? Is the internal RC oscillator enough to run it? If so, is all functionality enabled for this use case? Would it just be clocking performance that might suffer some slight degradation?</A></P><P></P><P>Thanks.</P><P>Daniel</P></BODY></HTML> Tue, 07 Aug 2018 19:55:33 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPC824M201JHI33-use-without-oscillator/m-p/829038#M33113 daniel2 2018-08-07T19:55:33Z Re: LPC824M201JHI33 use without oscillator https://community.nxp.com/t5/LPC-Microcontrollers/LPC824M201JHI33-use-without-oscillator/m-p/829039#M33114 <HTML><HEAD></HEAD><BODY><P>Hello&nbsp;<A _jive_internal="true" data-content-finding="Community" data-userid="324103" data-username="daniel@herasys.com" href="https://community.nxp.com/people/daniel@herasys.com">Daniel Brown</A>,&nbsp;</P><P></P><P>In the user manual of the LPC824 (<A class="link-titled" href="https://www.nxp.com/docs/en/user-guide/UM10800.pdf" title="https://www.nxp.com/docs/en/user-guide/UM10800.pdf">https://www.nxp.com/docs/en/user-guide/UM10800.pdf</A>) under section 5.3.2 you can find the following information.&nbsp;</P><P><span class="lia-inline-image-display-wrapper" image-alt="pastedImage_4.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/27046iA014BF0B34DB4265/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_4.png" alt="pastedImage_4.png" /></span></P><P>So, you can definitely use the internal oscillator as the main clock. The development board for the LPC824 (<A class="link-titled" href="https://www.nxp.com/support/developer-resources/hardware-development-tools/lpcxpresso-boards/lpcxpresso824-max-board-for-lpc82x-family-mcus:OM13071" title="https://www.nxp.com/support/developer-resources/hardware-development-tools/lpcxpresso-boards/lpcxpresso824-max-board-for-lpc82x-family-mcus:OM13071">LPCXpresso824-MAX Board for LPC82x family MCUs|NXP</A>&nbsp;) actually uses the IRC in all the examples that we provide (Code Bundle, LPCOpen and SDK) as the input for the PLL and the output of the PLL is the source of the main clock.</P><P></P><DIV><DIV><P>Hope it helps!</P><P>Victor.</P><P>-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></DIV></DIV><P><SPAN class="" data-display-overall="true" data-helpful-count="1" data-object-id="1039508" data-object-type="2" data-overall-count="1" style="color: #138700; background-color: #ffffff; border: 0px; font-size: 14px;"></SPAN>&nbsp;</P></BODY></HTML> Wed, 08 Aug 2018 15:55:39 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPC824M201JHI33-use-without-oscillator/m-p/829039#M33114 victorjimenez 2018-08-08T15:55:39Z