Re: RE: DDR ram issue using MCF54450 @240Mhz
"nop head" <[email protected]> Wed, 17 Dec 2008 16:32:23 +0000
| Newsgroups | gmane.comp.hardware.motorola.microcontrollers.coldfire |
|---|---|
| Message-ID | <[email protected]> |
------=_Part_28361_24576821.1229531543940 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline Gregg, I think turning on the cache allows burst accesses so if there is a problem with those then it only shows up when the cache is enabled. Regards, Chris 2008/12/17 Granville Gregg <[email protected]> > Hi all > > > > More to report my actual problem appears to be cache I have disabled icache > and u-boot seems to be working as expected. If I type (icache on) the system > locks up. Anyone know if this symptom is telling me something I need to look > at such a layout other variables ect. > > > > Gregg > > > ------------------------------ > > *Gregg GRANVILLE* > > Hardware Engineering Manager > > ------------------------------------------------------- > > Tel 1 603.622.0212 / Fax 1 603.623.5623 > > [email protected] / www.metronics.com > > > ----------------------------------------------------------------------------------------- > > *METRONICS* /// 30 Harvey Road // Bedford, NH 03110-6818 / US > > *From:* [email protected] [mailto:[email protected]] > *On Behalf Of *Granville Gregg > *Sent:* Wednesday, December 17, 2008 8:00 AM > *To:* Granville Gregg > *Subject:* [ColdFire] DDR ram issue using MCF54450 @240Mhz > > > > We have a MCF54450 running at a CPU CLK of 240Mhz. we are using U-Boot > 1.2.0 our design is using 1 16 bit Flash a PC28F256P33B85 BGA64. We are > executing code in Flash and have written a DDR-ram test walking ones and > walking zeros and address and address this will run for days at a time > billions and billions of writes and reads. > > When we move this to DDR-ram which is a MICRON MT47H64M8CF-3:F which we use > two of on SD-16 through SD-31with SD_A0-SD_A13 and > > SD_CS > > SD_DM2 > > SD_DQS2 > > SD_DM3 > > SD_DMQS3 > > > > We cannot run code we are using the same settings as the Reference design > the same chips. I have layed out the board with mentor and have put > restraints in all of the lines to keep them within .4 inches in length. > > > > The symptoms are it either gets an exception out in space or locks up > before it gets to NET: functions > > > > Anyone have any thoughts about the issue. > > > > Gregg > > > > > > [email protected] Send a post to the list. [email protected] the list. > [email protected] Join the list in digest mode. > [email protected] Leave the list. > [email protected] Send a post to the list. [email protected] the list. > [email protected] Join the list in digest mode. > [email protected] Leave the list. > ------=_Part_28361_24576821.1229531543940 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline Gregg,<br><br>I think turning on the cache allows burst accesses so if there is a problem with those then it only shows up when the cache is enabled.<br><br>Regards, Chris<br><br><div class="gmail_quote">2008/12/17 Granville Gregg <span dir="ltr"><<a href="mailto:[email protected]">[email protected]</a>></span><br> <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> <div link="blue" vlink="purple" lang="EN-US"> <div> <p><span style="font-size: 11pt; color: rgb(31, 73, 125);">Hi all </span></p> <p><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p> <p><span style="font-size: 11pt; color: rgb(31, 73, 125);">More to report my actual problem appears to be cache I have disabled icache and u-boot seems to be working as expected. If I type (icache on) the system locks up. Anyone know if this symptom is telling me something I need to look at such a layout other variables ect.</span></p> <p><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p> <p><span style="font-size: 11pt; color: rgb(31, 73, 125);">Gregg</span></p> <p><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p> <div> <div style="text-align: center;" align="center"><span style="color: rgb(31, 73, 125);"> <hr align="center" size="2" width="100%"> </span></div> <p><b><span style="font-size: 10pt; color: rgb(40, 40, 40);">Gregg GRANVILLE</span></b><span style="color: rgb(31, 73, 125);"></span></p> <p><span style="font-size: 10pt; color: rgb(40, 40, 40);">Hardware Engineering Manager</span><span style="color: rgb(31, 73, 125);"></span></p> <p><span style="font-size: 10pt; color: maroon;">-------------------------------------------------------</span><span style="color: rgb(31, 73, 125);"></span></p> <p><span style="font-size: 10pt; color: rgb(40, 40, 40);">Tel 1 603.622.0212 / Fax 1 603.623.5623</span><span style="color: rgb(31, 73, 125);"></span></p> <p><span style="color: rgb(31, 73, 125);"><a href="mailto:[email protected]" target="_blank"><span style="font-size: 10pt; color: rgb(40, 40, 40);">[email protected]</span></a></span><span style="font-size: 10pt; color: rgb(40, 40, 40);"> / </span><span style="color: rgb(31, 73, 125);"><a href="http://www.metronics.com" target="_blank"><span style="font-size: 10pt; color: rgb(40, 40, 40);">www.metronics.com</span></a></span></p> <p><span style="font-size: 10pt; color: maroon;">-----------------------------------------------------------------------------------------</span><span style="color: rgb(31, 73, 125);"></span></p> </div> <p><b><span style="font-size: 10pt; color: maroon;">METRONICS</span></b><span style="font-size: 10pt; color: rgb(31, 73, 125);"> </span><span style="font-size: 10pt; color: rgb(40, 40, 40);">/// 30 Harvey Road // Bedford, NH 03110-6818 / US</span><span style="font-size: 11pt; color: rgb(31, 73, 125);"></span></p> <div> <div style="border-style: solid none none; border-color: rgb(181, 196, 223) -moz-use-text-color -moz-use-text-color; border-width: 1pt medium medium; padding: 3pt 0in 0in;"> <p><b><span style="font-size: 10pt;">From:</span></b><span style="font-size: 10pt;"> <a href="mailto:[email protected]" target="_blank">[email protected]</a> [mailto:<a href="mailto:[email protected]" target="_blank">[email protected]</a>] <b>On Behalf Of </b>Granville Gregg<br> <b>Sent:</b> Wednesday, December 17, 2008 8:00 AM<br> <b>To:</b> Granville Gregg<br> <b>Subject:</b> [ColdFire] DDR ram issue using MCF54450 @240Mhz</span></p> </div> </div><div><div></div><div class="Wj3C7c"> <p> </p> <p>We have a MCF54450 running at a CPU CLK of 240Mhz. we are using U-Boot 1.2.0 our design is using 1 16 bit Flash a PC28F256P33B85 BGA64. We are executing code in Flash and have written a DDR-ram test walking ones and walking zeros and address and address this will run for days at a time billions and billions of writes and reads.</p> <p>When we move this to DDR-ram which is a MICRON MT47H64M8CF-3:F which we use two of on SD-16 through SD-31with SD_A0-SD_A13 and</p> <p>SD_CS</p> <p>SD_DM2</p> <p>SD_DQS2</p> <p>SD_DM3</p> <p>SD_DMQS3</p> <p> </p> <p>We cannot run code we are using the same settings as the Reference design the same chips. I have layed out the board with mentor and have put restraints in all of the lines to keep them within .4 inches in length. </p> <p> </p> <p>The symptoms are it either gets an exception out in space or locks up before it gets to NET: functions</p> <p> </p> <p>Anyone have any thoughts about the issue.</p> <p> </p> <p>Gregg </p> <p><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p> <p><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p> <p><a href="mailto:[email protected]" target="_blank">[email protected]</a> Send a post to the list. <a href="mailto:[email protected]" target="_blank">[email protected]</a> Join the list. <a href="mailto:[email protected]" target="_blank">[email protected]</a> Join the list in digest mode. <a href="mailto:[email protected]" target="_blank">[email protected]</a> Leave the list.</p> </div></div></div> </div><div><div></div><div class="Wj3C7c"> <a href="mailto:[email protected]" target="_blank">[email protected]</a> Send a post to the list. <a href="mailto:[email protected]" target="_blank">[email protected]</a> Join the list. <a href="mailto:[email protected]" target="_blank">[email protected]</a> Join the list in digest mode. <a href="mailto:[email protected]" target="_blank">[email protected]</a> Leave the list.</div></div></blockquote></div><br> [email protected] Send a post to the list. [email protected] Join the list. [email protected] Join the list in digest mode. [email protected] Leave the list. ------=_Part_28361_24576821.1229531543940--