Re: CALRAM looks all "0xFFFF"
"randydees" <[email protected]> Fri, 25 Jun 2010 16:26:50 -0000
| Newsgroups | gmane.comp.hardware.motorola.microcontrollers |
|---|---|
| Message-ID | <[email protected]> |
--AtmbMMPhRFGj0w4tdL1llVodI4hUQhuYFWgtaKq Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable have you checked that the power supply pins for the SRAM are all connected = properly? =20 VDDSRAM1,2, and 3 must each be connected to a 2.6V supply. If these supplie= s are not connected, the SRAM will be disabled. From what I recall, the swi= tch that decides if the SRAM should be powered by the VDDSRAM pin or the "n= ormal" 2.6V supply, is powered by the VDDSRAM. IF there is no voltage on th= e VDDSRAM pin, then the SRAM is powered off. =20 regards, randy --- In [email protected], "Corey, Richard" <Richard.Corey@...> wrote: > > Hi >=20 > Even after we set up to use MPC565 CALRAM, it seems to always be 0xFFFF. > Even the GHS debugger shows it as 0xFFFF, even if we use "memory fill" > to try to write to it. >=20 > Can anyone suggest an easily-overlooked or non-obvious part of CALRAM > software setup? > Or if someone has seen this on their own board, what they had to do to > fix it? >=20 > Or if there is something at the hardware level that has to be done to > enable the chip's internal CALRAM? >=20 > Thanks very much, I'm sorry this is such a vague question.=20 > I couldn't find "CALRAM" in the email archive. >=20 --AtmbMMPhRFGj0w4tdL1llVodI4hUQhuYFWgtaKq Content-Type: text/html; charset=ISO-8859-1 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: #fff;"> <span style="display:none"> </span> <!--~-|**|PrettyHtmlStartT|**|-~--> <div id="ygrp-mlmsg" style="position:relative;"> <div id="ygrp-msg" style="z-index: 1;"> <!--~-|**|PrettyHtmlEndT|**|-~--> <div id="ygrp-text" > <p>have you checked that the power supply pins for the SRAM are all connected properly?<br> <br> VDDSRAM1,2, and 3 must each be connected to a 2.6V supply. If these supplies are not connected, the SRAM will be disabled. From what I recall, the switch that decides if the SRAM should be powered by the VDDSRAM pin or the "normal" 2.6V supply, is powered by the VDDSRAM. IF there is no voltage on the VDDSRAM pin, then the SRAM is powered off.<br> <br> regards,<br> randy<br> <br> --- In <a href="mailto:MPC500%40yahoogroups.com">[email protected]</a>, "Corey, Richard" <Richard.Corey@...> wrote:<br> ><br> > Hi<br> > <br> > Even after we set up to use MPC565 CALRAM, it seems to always be 0xFFFF.<br> > Even the GHS debugger shows it as 0xFFFF, even if we use "memory fill"<br> > to try to write to it.<br> > <br> > Can anyone suggest an easily-overlooked or non-obvious part of CALRAM<br> > software setup?<br> > Or if someone has seen this on their own board, what they had to do to<br> > fix it?<br> > <br> > Or if there is something at the hardware level that has to be done to<br> > enable the chip's internal CALRAM?<br> > <br> > Thanks very much, I'm sorry this is such a vague question. <br> > I couldn't find "CALRAM" in the email archive.<br> > <br> <br> </p> </div> <!--~-|**|PrettyHtmlStart|**|-~--> <div style="color: #fff; height: 0;">__._,_.___</div> <div id="ygrp-actbar" style="clear: both; margin-bottom: 10px; white-space: nowrap; color: #666; padding-top: 15px;"> <div> <a href="mailto:[email protected]?subject=Re: CALRAM looks all "0xFFFF"" style="margin-right: 0; padding-right: 0;"> Reply to <span style="font-weight: 700;">sender</span></a> | <a href="mailto:[email protected]?subject=Re: CALRAM looks all "0xFFFF""> Reply to <span style="font-weight: 700;">group</span></a> | <a href="http://groups.yahoo.com/group/MPC500/post;_ylc=X3oDMTJwbGxudmgyBF9TAzk3MzU5NzE0BGdycElkAzYyNzYzODcEZ3Jwc3BJZAMxNzA2NTU0MjA1BG1zZ0lkAzQwMjcEc2VjA2Z0cgRzbGsDcnBseQRzdGltZQMxMjc3NDgzMjMw?act=reply&messageNum=4027">Reply <span style="font-weight: 700;">via web post</span></a> | <a href="http://groups.yahoo.com/group/MPC500/post;_ylc=X3oDMTJlNTdwaDBtBF9TAzk3MzU5NzE0BGdycElkAzYyNzYzODcEZ3Jwc3BJZAMxNzA2NTU0MjA1BHNlYwNmdHIEc2xrA250cGMEc3RpbWUDMTI3NzQ4MzIzMA--" style="font-weight: 700;">Start a New Topic</a> </div> <a href="http://groups.yahoo.com/group/MPC500/message/4026;_ylc=X3oDMTM0ZGtkYjg0BF9TAzk3MzU5NzE0BGdycElkAzYyNzYzODcEZ3Jwc3BJZAMxNzA2NTU0MjA1BG1zZ0lkAzQwMjcEc2VjA2Z0cgRzbGsDdnRwYwRzdGltZQMxMjc3NDgzMjMwBHRwY0lkAzQwMjY-">Messages in this topic</a> (<span style="font-weight: 700;">2</span>) </div> <!------- Start Nav Bar ------> <!-- |**|begin egp html banner|**| --> <div id="ygrp-vital" style="background-color: #e0ecee; font-family: Verdana; font-size: 10px; margin-bottom: 10px; padding: 10px;"> <span id="vithd" style="font-weight: bold; color: #333; text-transform: uppercase; ">Recent Activity:</span> <ul style="list-style-type: none; margin: 0; padding: 0; display: inline;"> </ul> <div style="clear: both; padding-top: 2px; color: #1e66ae;"> <a href="http://groups.yahoo.com/group/MPC500;_ylc=X3oDMTJlaWNsMjg0BF9TAzk3MzU5NzE0BGdycElkAzYyNzYzODcEZ3Jwc3BJZAMxNzA2NTU0MjA1BHNlYwN2dGwEc2xrA3ZnaHAEc3RpbWUDMTI3NzQ4MzIzMA--" style="text-decoration: none;">Visit Your Group</a> </div> </div> <div id="ygrp-grft" style="font-family: Verdana; font-size: 12px; padding: 15px 0;"> <!-- |**|begin egp html banner|**| --> -----------------------------------------------------------<BR> To learn more about Freescale Microcontrollers, please visit<BR> <a href="http://www.freescale.com/mcu">http://www.freescale.com/mcu</a><BR> <BR> <BR> <!-- |**|end egp html banner|**| --> </div> <div id="ygrp-mkp" style="border: 1px solid #d8d8d8; clear: both; float: left; font-family: Arial; margin: 5px 0 10px 0; padding: 0 10px;"> <div id="hd" style="color: #628c2a; font-size: 85%; font-weight: 700; line-height: 122%; margin: 10px 0;">MARKETPLACE</div> <div id="ads" style="margin-bottom: 10px;"> <div class="ad" style="color: #628C2A; font-family: Arial; font-weight: 700; padding: 0 0;"> <p><a href="http://us.ard.yahoo.com/SIG=15o6effhl/M=493064.13983314.14041046.13298430/D=groups/S=1706554205:MKP1/Y=YAHOO/EXP=1277490430/L=8162ce84-8076-11df-be03-b7e92fe08a9c/B=TJiGGWKImiU-/J=1277483230970627/K=MwgOoWfBAYJVAWqErFP86A/A=6060255/R=0/SIG=1194m4keh/*http://us.toolbar.yahoo.com/?.cpdl=grpj">Stay on top of your group activity without leaving the page you're on - Get the Yahoo! 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