topic Re: K70 &quot;MK70FN1M0VMJ12&quot; Reset pin continuously toggle with sawtooth waveform in Kinetis Microcontrollers https://community.nxp.com/t5/Kinetis-Microcontrollers/K70-quot-MK70FN1M0VMJ12-quot-Reset-pin-continuously-toggle-with/m-p/242446#M6056 <HTML><HEAD></HEAD><BODY><P>HI</P><P></P><P>check this</P><P> <A _jive_internal="true" href="https://community.nxp.com/thread/308926" style="font-size: 10pt; line-height: 1.5em;">https://community.freescale.com/thread/308926</A></P><P></P><P>your board looks like trying to come out of reset but the reset line pull it low again. Something similar to bricking of the controller. You can follow the steps described to unlock the controller in the community</P><P></P><P>link hope they work for you</P><P></P><P>cheers!!!</P></BODY></HTML> Fri, 20 Sep 2013 10:06:34 GMT deepakrana 2013-09-20T10:06:34Z K70 "MK70FN1M0VMJ12" Reset pin continuously toggle with sawtooth waveform https://community.nxp.com/t5/Kinetis-Microcontrollers/K70-quot-MK70FN1M0VMJ12-quot-Reset-pin-continuously-toggle-with/m-p/242445#M6055 <HTML><HEAD></HEAD><BODY><P>Hi</P><P>We have disigned board with "MK70FN1M0VMJ12". When first time we programmed the board DDR2, NAND flash, UART, DAC &amp; LCD interfaces were woking with test code written.</P><P><SPAN style="font-size: 10pt; color: black; font-family: 'Arial','sans-serif';">We are using custom board with K70 microcontroller. Currently we are facing issue with program downloading. We are not able to download any program.</SPAN></P><P><SPAN style="font-size: 10pt; color: black; font-family: 'Arial','sans-serif';">Initially we had downloaded some test code successfully. But later on we are not able to download any code. Please help urgently. <BR /><BR />Following are our observations, </SPAN></P><OL style="list-style-type: decimal;"><LI><SPAN style="font-size: 10pt; color: black; font-family: 'Arial','sans-serif';"><BR />1. We are getting triangular waveform on "RESET PIN". <BR />2. We are able to detect controller at "<STRONG>Target option---&gt;Debug----&gt;Setting</STRONG>" <BR />3. When we try to download program we are getting following error message <BR />"Cannot access memory"</SPAN></LI></OL><P><SPAN style="font-size: 10pt; color: black; font-family: 'Arial','sans-serif';"> </SPAN></P><P><SPAN style="font-size: 10pt; color: black; font-family: 'Arial','sans-serif';">We have tried following options to resolve issue,</SPAN></P><P style="text-indent: -0.25in;"><SPAN style="font-size: 10pt; color: #51626f; font-family: 'Arial','sans-serif';"><SPAN class="pasted-list-info">1.&nbsp;&nbsp;&nbsp;&nbsp; </SPAN></SPAN><SPAN style="font-size: 10pt; color: black; font-family: 'Arial','sans-serif';">For ULINK2, debug adapters, Connect and Reset Options in Options For Target — Debug — Settings are set as follows:</SPAN></P><P><SPAN style="font-size: 10pt; color: black; font-family: 'Arial','sans-serif';">-The Connect: option must be set to under Reset </SPAN></P><P><SPAN style="font-size: 10pt; color: black; font-family: 'Arial','sans-serif';">-The Reset: option must be set to HW RESET</SPAN></P><P><SPAN style="font-size: 10pt; color: black; font-family: 'Arial','sans-serif';"> </SPAN></P><P style="text-indent: -0.25in;"><SPAN style="font-size: 10pt; color: #51626f; font-family: 'Arial','sans-serif';"><SPAN class="pasted-list-info">2.&nbsp;&nbsp;&nbsp;&nbsp; </SPAN></SPAN><SPAN style="font-size: 10pt; color: black; font-family: 'Arial','sans-serif';">In our board we are using 12MHz crystal at pin EXTAL1. So we tried programming by disabling crystal</SPAN><SPAN style="color: black;">.</SPAN></P><P><SPAN style="color: black;"> </SPAN></P><P style="text-indent: -0.25in;"><SPAN style="font-size: 10pt; color: #51626f; font-family: 'Arial','sans-serif';"><SPAN class="pasted-list-info">3.&nbsp;&nbsp;&nbsp;&nbsp; </SPAN></SPAN><SPAN style="color: black;">Press the reset button till the programming start</SPAN>.</P><P><SPAN style="color: black;"> </SPAN></P><P><SPAN style="color: black;">Even after trying above options we are unable to resolve this issue.</SPAN></P><P><SPAN style="color: black;">Request you to help on priority since we are unable to proceed further testing.</SPAN></P></BODY></HTML> Fri, 20 Sep 2013 08:27:23 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/K70-quot-MK70FN1M0VMJ12-quot-Reset-pin-continuously-toggle-with/m-p/242445#M6055 prashantbendre 2013-09-20T08:27:23Z Re: K70 "MK70FN1M0VMJ12" Reset pin continuously toggle with sawtooth waveform https://community.nxp.com/t5/Kinetis-Microcontrollers/K70-quot-MK70FN1M0VMJ12-quot-Reset-pin-continuously-toggle-with/m-p/242446#M6056 <HTML><HEAD></HEAD><BODY><P>HI</P><P></P><P>check this</P><P> <A _jive_internal="true" href="https://community.nxp.com/thread/308926" style="font-size: 10pt; line-height: 1.5em;">https://community.freescale.com/thread/308926</A></P><P></P><P>your board looks like trying to come out of reset but the reset line pull it low again. Something similar to bricking of the controller. You can follow the steps described to unlock the controller in the community</P><P></P><P>link hope they work for you</P><P></P><P>cheers!!!</P></BODY></HTML> Fri, 20 Sep 2013 10:06:34 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/K70-quot-MK70FN1M0VMJ12-quot-Reset-pin-continuously-toggle-with/m-p/242446#M6056 deepakrana 2013-09-20T10:06:34Z Re: K70 "MK70FN1M0VMJ12" Reset pin continuously toggle with sawtooth waveform https://community.nxp.com/t5/Kinetis-Microcontrollers/K70-quot-MK70FN1M0VMJ12-quot-Reset-pin-continuously-toggle-with/m-p/242447#M6057 <HTML><HEAD></HEAD><BODY><P>Hi Deepak,</P><P>Can you please give us details .</P></BODY></HTML> Fri, 20 Sep 2013 15:33:20 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/K70-quot-MK70FN1M0VMJ12-quot-Reset-pin-continuously-toggle-with/m-p/242447#M6057 prashantbendre 2013-09-20T15:33:20Z