https://community.nxp.com/t5/S12-MagniV-Microcontrollers/Serial-Communication/m-p/2332405#M20861 <P>I am using Codewarrior 5.2 and the controller is MC9S12DG256B. When I am trying to enable Serial communication using Device initialization it is showing the bellow error.</P><DIV class="">&nbsp;</DIV><P>I am also not able to update the registers for setting up Baud Rate and also the clock settings is greyed out.<span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="image.jpg" style="width: 754px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/379238i8FF628051E91251D/image-size/large?v=v2&amp;px=999" role="button" title="image.jpg" alt="image.jpg" /></span><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="image (5).png" style="width: 999px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/379239iFFC08B2717DCED69/image-size/large?v=v2&amp;px=999" role="button" title="image (5).png" alt="image (5).png" /></span></P> Fri, 13 Mar 2026 09:57:50 GMT Aswin_5232 2026-03-13T09:57:50Z https://community.nxp.com/t5/S12-MagniV-Microcontrollers/Serial-Communication/m-p/2332405#M20861 <P>I am using Codewarrior 5.2 and the controller is MC9S12DG256B. When I am trying to enable Serial communication using Device initialization it is showing the bellow error.</P><DIV class="">&nbsp;</DIV><P>I am also not able to update the registers for setting up Baud Rate and also the clock settings is greyed out.<span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="image.jpg" style="width: 754px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/379238i8FF628051E91251D/image-size/large?v=v2&amp;px=999" role="button" title="image.jpg" alt="image.jpg" /></span><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="image (5).png" style="width: 999px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/379239iFFC08B2717DCED69/image-size/large?v=v2&amp;px=999" role="button" title="image (5).png" alt="image (5).png" /></span></P> Fri, 13 Mar 2026 09:57:50 GMT https://community.nxp.com/t5/S12-MagniV-Microcontrollers/Serial-Communication/m-p/2332405#M20861 Aswin_5232 2026-03-13T09:57:50Z