topic frdm-K64F clock setting in Kinetis Design Studio https://community.nxp.com/t5/Kinetis-Design-Studio/frdm-K64F-clock-setting/m-p/438534#M4023 <HTML><HEAD></HEAD><BODY><P>Hi, I have the clock on my frdm-K64F set to 120mhz thanks to Erich Styger's article. But in my PPG component (KDS 3.0) the timing period steps are all decimal equivalents of one third. Like .33333 or .6666 microseconds. Is it possible to set the clock to another value so that the PPG times and steps will be even multiples of a microsecond? Like .5 or 1.0 usec? How would I set that up?</P></BODY></HTML> Mon, 29 Jun 2015 03:15:39 GMT daveboyle 2015-06-29T03:15:39Z frdm-K64F clock setting https://community.nxp.com/t5/Kinetis-Design-Studio/frdm-K64F-clock-setting/m-p/438534#M4023 <HTML><HEAD></HEAD><BODY><P>Hi, I have the clock on my frdm-K64F set to 120mhz thanks to Erich Styger's article. But in my PPG component (KDS 3.0) the timing period steps are all decimal equivalents of one third. Like .33333 or .6666 microseconds. Is it possible to set the clock to another value so that the PPG times and steps will be even multiples of a microsecond? Like .5 or 1.0 usec? How would I set that up?</P></BODY></HTML> Mon, 29 Jun 2015 03:15:39 GMT https://community.nxp.com/t5/Kinetis-Design-Studio/frdm-K64F-clock-setting/m-p/438534#M4023 daveboyle 2015-06-29T03:15:39Z Re: frdm-K64F clock setting https://community.nxp.com/t5/Kinetis-Design-Studio/frdm-K64F-clock-setting/m-p/438535#M4024 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>the solution is to trim the Internal oscillator to 31.25KHz.</P><P><span class="lia-inline-image-display-wrapper" image-alt="pastedImage_0.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/61164i3F16E1C6A6041912/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_0.png" alt="pastedImage_0.png" /></span></P><P></P><P>thus we can get a integer number MCG FLL output. so setting PPG period as 1us is also possible.</P><P>see my attached demo code.</P><P>can this help you? <BR />Have a great day,<BR />Zhang Jun</P><P></P><P>-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Thu, 02 Jul 2015 06:13:35 GMT https://community.nxp.com/t5/Kinetis-Design-Studio/frdm-K64F-clock-setting/m-p/438535#M4024 ZhangJennie 2015-07-02T06:13:35Z