MPC565 hanging at temperature
"Pete James" <[email protected]> Mon, 24 Nov 2008 11:14:09 -0000
| Newsgroups | gmane.comp.hardware.motorola.microcontrollers |
|---|---|
| Message-ID | <62050F225407ED4485D1244F226180F503CDABE4@svr-w-exchange.Prodrive.com> |
--KHCLx9fUIlssbmhlkSuWg--mXXCc5IvLl4ZBx0E Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Hi all, We have a problem with a MPC566 based ECU. We have manufactured several batches of this product with no problems. The latest batch freeze at temperatures over 80 degrees C. The MPC566 part is an MZ part so should be good for 125 degrees. We have checked all the supplies and they are correct. PORESET is stable (not asserted) HRESET is flicking up and down - presumably causing the reset of the part, and generated internally When the ambient temperature falls below 80 degrees the part runs normally again. We have nothing connected to the HRESET line other than the pull up resistor. Any thoughts and help would be appreciated. It's baffling us as previous batches have worked with no problems. Best regards Pete Pete James Technical Specialist/Chief Engineer - Electronics & Software Prodrive Kenilworth Warwickshire CV8 1NR UK DDI - +44 (0) 1676 536023 Email - [email protected] --KHCLx9fUIlssbmhlkSuWg--mXXCc5IvLl4ZBx0E Content-Type: text/html; charset=US-ASCII Content-Transfer-Encoding: 7bit <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> </head> <body style="background-color: #ffffff;"> <!--~-|**|PrettyHtmlStartT|**|-~--> <div id="ygrp-mlmsg" style="width:655px; position:relative;"> <div id="ygrp-msg" style="width: 470px; margin:0; padding:0 25px 0 0; float:left; z-index:1;"> <!--~-|**|PrettyHtmlEndT|**|-~--> <div id="ygrp-text"> <p>Hi all,<br> <br> We have a problem with a MPC566 based ECU. We have manufactured several<br> batches of this product with no problems. The latest batch freeze at<br> temperatures over 80 degrees C. The MPC566 part is an MZ part so should<br> be good for 125 degrees.<br> <br> We have checked all the supplies and they are correct.<br> <br> PORESET is stable (not asserted)<br> HRESET is flicking up and down - presumably causing the reset of the<br> part, and generated internally<br> <br> When the ambient temperature falls below 80 degrees the part runs<br> normally again. We have nothing connected to the HRESET line other than<br> the pull up resistor.<br> <br> Any thoughts and help would be appreciated. It's baffling us as previous<br> batches have worked with no problems.<br> <br> Best regards<br> Pete<br> <br> Pete James<br> Technical Specialist/Chief Engineer - Electronics & Software<br> Prodrive<br> Kenilworth<br> Warwickshire<br> CV8 1NR<br> UK<br> DDI - +44 (0) 1676 536023<br> Email - <a href="mailto:pjames%40prodrive.com">pjames@prodrive.<wbr>com</a><br> </p> </div> <!--~-|**|PrettyHtmlStart|**|-~--> <span width="1" style="color: white;">__._,_.___</span> <!-- Start the section with Message In topic --> <div id="ygrp-actbar"> <span class="left"> <a href="http://groups.yahoo.com/group/MPC500/message/3431;_ylc=X3oDMTM0cXZlZmhuBF9TAzk3MzU5NzE0BGdycElkAzYyNzYzODcEZ3Jwc3BJZAMxNzA2NTU0MjA1BG1zZ0lkAzM5NTkEc2VjA2Z0cgRzbGsDdnRwYwRzdGltZQMxMjI3NTI1MjUxBHRwY0lkAzM0MzE-"> Messages in this topic </a> (<span class="bld">3</span>) </span> <a href="http://groups.yahoo.com/group/MPC500/post;_ylc=X3oDMTJwdGU1MHM2BF9TAzk3MzU5NzE0BGdycElkAzYyNzYzODcEZ3Jwc3BJZAMxNzA2NTU0MjA1BG1zZ0lkAzM5NTkEc2VjA2Z0cgRzbGsDcnBseQRzdGltZQMxMjI3NTI1MjUx?act=reply&messageNum=3959"> <span class="bld"> Reply </span> (via web post) </a> | <a href="http://groups.yahoo.com/group/MPC500/post;_ylc=X3oDMTJldWljM3RpBF9TAzk3MzU5NzE0BGdycElkAzYyNzYzODcEZ3Jwc3BJZAMxNzA2NTU0MjA1BHNlYwNmdHIEc2xrA250cGMEc3RpbWUDMTIyNzUyNTI1MQ--" class="bld"> Start a new topic </a> </div> <!------- Start Nav Bar ------> <!-- |**|begin egp html banner|**| --> <div id="ygrp-vitnav"> <a href="http://groups.yahoo.com/group/MPC500/messages;_ylc=X3oDMTJlMmYwZnR0BF9TAzk3MzU5NzE0BGdycElkAzYyNzYzODcEZ3Jwc3BJZAMxNzA2NTU0MjA1BHNlYwNmdHIEc2xrA21zZ3MEc3RpbWUDMTIyNzUyNTI1MQ--">Messages</a> | <a href="http://groups.yahoo.com/group/MPC500/links;_ylc=X3oDMTJmbGMyMDMzBF9TAzk3MzU5NzE0BGdycElkAzYyNzYzODcEZ3Jwc3BJZAMxNzA2NTU0MjA1BHNlYwNmdHIEc2xrA2xpbmtzBHN0aW1lAzEyMjc1MjUyNTE-">Links</a> </div> <!-- |**|end egp html banner|**| --> <div id="ygrp-grft"> </div> <div id="ygrp-mkp"> <div id="hd">MARKETPLACE</div> <div id="ads"> <div class="ad"> <hr noshade="noshade" size="1"><a href="http://us.ard.yahoo.com/SIG=13r591mke/M=493064.12016295.13271503.10835568/D=groups/S=1706554205:MKP1/Y=YAHOO/EXP=1227532452/L=/B=TYylCULaX.0-/J=1227525252259681/A=5530388/R=0/SIG=11nuutlas/*http://explore.yahoo.com/groups/kraftmealsmadesimple/">From kitchen basics to easy recipes - join the Group from Kraft Foods </a> </div> </div> </div> <!-- yahoo logo --> <!-- |**|begin egp html banner|**| --> <div id="ygrp-ft"> <a href="http://groups.yahoo.com/;_ylc=X3oDMTJkdGJua3F0BF9TAzk3MzU5NzE0BGdycElkAzYyNzYzODcEZ3Jwc3BJZAMxNzA2NTU0MjA1BHNlYwNmdHIEc2xrA2dmcARzdGltZQMxMjI3NTI1MjUx"> <img src="http://us.i1.yimg.com/us.yimg.com/i/yg/img/logo/ma_grp_160.gif" height="15" width="106" border="0" alt="Yahoo! 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