Vybrid ProcessorsのトピックPin termination DDR address https://community.nxp.com/t5/Vybrid-Processors/Pin-termination-DDR-address/m-p/228822#M290 <HTML><HEAD></HEAD><BODY><P>Dear support,</P><P></P><P>We are planning to use DDR with 14bit address input.</P><P>Please teach us how to terminate unused address bits of Vybrid (DDR_A[14] and DDR_A[15]).</P><P>In the reference circuit, unused address bit was connected to VTT_DDR3 via 47ohm resister.</P><P></P><P>Best regards,</P><P>Keisuke</P></BODY></HTML> Tue, 30 Jul 2013 00:52:39 GMT keisukewatanabe 2013-07-30T00:52:39Z Pin termination DDR address https://community.nxp.com/t5/Vybrid-Processors/Pin-termination-DDR-address/m-p/228822#M290 <HTML><HEAD></HEAD><BODY><P>Dear support,</P><P></P><P>We are planning to use DDR with 14bit address input.</P><P>Please teach us how to terminate unused address bits of Vybrid (DDR_A[14] and DDR_A[15]).</P><P>In the reference circuit, unused address bit was connected to VTT_DDR3 via 47ohm resister.</P><P></P><P>Best regards,</P><P>Keisuke</P></BODY></HTML> Tue, 30 Jul 2013 00:52:39 GMT https://community.nxp.com/t5/Vybrid-Processors/Pin-termination-DDR-address/m-p/228822#M290 keisukewatanabe 2013-07-30T00:52:39Z Re: Pin termination DDR address https://community.nxp.com/t5/Vybrid-Processors/Pin-termination-DDR-address/m-p/228823#M291 <HTML><HEAD></HEAD><BODY><P style="font-family: 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; color: #3d3d3d;">Dear <SPAN style="color: #3d3d3d; font-family: 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif;">Keisuke</SPAN>,</P><P style="font-family: 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; color: #3d3d3d;">You may use the same approach as the<SPAN style="color: #3d3d3d; font-family: 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif;"> reference circuit</SPAN> does.</P><P style="font-family: 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; color: #3d3d3d;">At the same time, termination is required for impedance matching of a toggling line, but unused lines do not toggle...</P><P style="font-family: 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; color: #3d3d3d;"><SPAN style="font-size: 10pt; line-height: 1.5em;">Best regards, Naoum Gitnik.</SPAN></P></BODY></HTML> Tue, 30 Jul 2013 19:33:33 GMT https://community.nxp.com/t5/Vybrid-Processors/Pin-termination-DDR-address/m-p/228823#M291 naoumgitnik 2013-07-30T19:33:33Z