RE: MPC565 hanging at temperature
"Dobbin Allan" <[email protected]> Mon, 24 Nov 2008 08:54:27 -0700
| Newsgroups | gmane.comp.hardware.motorola.microcontrollers |
|---|---|
| Message-ID | <4147ED8B92A864498825C07E53594E4A03DEC05B@az33exm20.fsl.freescale.net> |
--l4Fg0OhlN5DbQuL4SyOhTFcC3LFzPfIbCkOaO2m Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit I remember previous posts about he the value of the HRESET resistor i.e. reducing from 10K to 4.7k or 1k. Could you please search previous posts forthis and see if it gives any improvement? What value of R are you using? - Allan ________________________________ From: [email protected] [mailto:[email protected]] On Behalf Of Pete James Sent: Monday, November 24, 2008 5:14 AM To: [email protected] Subject: [MPC500] MPC565 hanging at temperature 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] <mailto:pjames%40prodrive.com> [Non-text portions of this message have been removed] --l4Fg0OhlN5DbQuL4SyOhTFcC3LFzPfIbCkOaO2m 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>I remember previous posts about he the value of the HRESET resistor i.e.<br> reducing from 10K to 4.7k or 1k. Could you please search previous posts<br> forthis and see if it gives any improvement? What value of R are you<br> using?<br> <br> - Allan<br> <br> ____________<wbr>_________<wbr>_________<wbr>__<br> <br> From: <a href="mailto:MPC500%40yahoogroups.com">MPC500@yahoogroups.<wbr>com</a> [mailto:<a href="mailto:MPC500%40yahoogroups.com">MPC500@yahoogroups.<wbr>com</a>] On Behalf<br> Of Pete James<br> Sent: Monday, November 24, 2008 5:14 AM<br> To: <a href="mailto:MPC500%40yahoogroups.com">MPC500@yahoogroups.<wbr>com</a><br> Subject: [MPC500] MPC565 hanging at temperature<br> <br> 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> <mailto:pjames%<wbr>40prodrive.<wbr>com> <br> <br> [Non-text portions of this message have been removed]<br> <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=X3oDMTM0NjhmODM3BF9TAzk3MzU5NzE0BGdycElkAzYyNzYzODcEZ3Jwc3BJZAMxNzA2NTU0MjA1BG1zZ0lkAzM5NjAEc2VjA2Z0cgRzbGsDdnRwYwRzdGltZQMxMjI3NTQyMDg0BHRwY0lkAzM0MzE-"> Messages in this topic </a> (<span class="bld">4</span>) </span> <a href="http://groups.yahoo.com/group/MPC500/post;_ylc=X3oDMTJwZ25tbHJzBF9TAzk3MzU5NzE0BGdycElkAzYyNzYzODcEZ3Jwc3BJZAMxNzA2NTU0MjA1BG1zZ0lkAzM5NjAEc2VjA2Z0cgRzbGsDcnBseQRzdGltZQMxMjI3NTQyMDg0?act=reply&messageNum=3960"> <span class="bld"> Reply </span> (via web post) </a> | <a href="http://groups.yahoo.com/group/MPC500/post;_ylc=X3oDMTJlYnI3a2VyBF9TAzk3MzU5NzE0BGdycElkAzYyNzYzODcEZ3Jwc3BJZAMxNzA2NTU0MjA1BHNlYwNmdHIEc2xrA250cGMEc3RpbWUDMTIyNzU0MjA4NA--" 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=X3oDMTJlYjhicWpvBF9TAzk3MzU5NzE0BGdycElkAzYyNzYzODcEZ3Jwc3BJZAMxNzA2NTU0MjA1BHNlYwNmdHIEc2xrA21zZ3MEc3RpbWUDMTIyNzU0MjA4NA--">Messages</a> | <a href="http://groups.yahoo.com/group/MPC500/links;_ylc=X3oDMTJmaTNxNGc2BF9TAzk3MzU5NzE0BGdycElkAzYyNzYzODcEZ3Jwc3BJZAMxNzA2NTU0MjA1BHNlYwNmdHIEc2xrA2xpbmtzBHN0aW1lAzEyMjc1NDIwODQ-">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=13r58fbs1/M=493064.12016295.13271503.10835568/D=groups/S=1706554205:MKP1/Y=YAHOO/EXP=1227549284/L=/B=7s8QMELaX.8-/J=1227542084962403/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=X3oDMTJkampwNmhoBF9TAzk3MzU5NzE0BGdycElkAzYyNzYzODcEZ3Jwc3BJZAMxNzA2NTU0MjA1BHNlYwNmdHIEc2xrA2dmcARzdGltZQMxMjI3NTQyMDg0"> <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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