LayerscapeのトピックRe: VTT termination with a single DDR4? https://community.nxp.com/t5/Layerscape/VTT-termination-with-a-single-DDR4/m-p/1004698#M5302 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P></P><P>Does it mean I need at least 2X DDR4 16 bit like the&nbsp;MT40A512M16?</P><P></P><P>Thank you</P></BODY></HTML> Tue, 25 Feb 2020 08:33:25 GMT maxime_guillot 2020-02-25T08:33:25Z VTT termination with a single DDR4? https://community.nxp.com/t5/Layerscape/VTT-termination-with-a-single-DDR4/m-p/1004696#M5300 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P></P><P>I am using the LS1046A for a new design with one DDR4 16 bits memory. In all the AN I read, there is mention of use of VTT termination resistors. Is it really mandatory even with only one DDR4 16 bits memory?</P><P></P><P>Thank you</P></BODY></HTML> Mon, 24 Feb 2020 13:41:22 GMT https://community.nxp.com/t5/Layerscape/VTT-termination-with-a-single-DDR4/m-p/1004696#M5300 maxime_guillot 2020-02-24T13:41:22Z Re: VTT termination with a single DDR4? https://community.nxp.com/t5/Layerscape/VTT-termination-with-a-single-DDR4/m-p/1004697#M5301 <HTML><HEAD></HEAD><BODY><P>You wrote:</P><P>&gt;&nbsp;<SPAN style="color: #51626f; background-color: #ffffff;">one DDR4 16 bits memory.</SPAN></P><P>The processor supports&nbsp;data bus widths:<BR />• 64-/72-bit<BR />• 32-/40-bit</P><P></P><P>Termination generally is required to match signals lines to eliminate excessive ringing.</P></BODY></HTML> Mon, 24 Feb 2020 17:20:38 GMT https://community.nxp.com/t5/Layerscape/VTT-termination-with-a-single-DDR4/m-p/1004697#M5301 ufedor 2020-02-24T17:20:38Z Re: VTT termination with a single DDR4? https://community.nxp.com/t5/Layerscape/VTT-termination-with-a-single-DDR4/m-p/1004698#M5302 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P></P><P>Does it mean I need at least 2X DDR4 16 bit like the&nbsp;MT40A512M16?</P><P></P><P>Thank you</P></BODY></HTML> Tue, 25 Feb 2020 08:33:25 GMT https://community.nxp.com/t5/Layerscape/VTT-termination-with-a-single-DDR4/m-p/1004698#M5302 maxime_guillot 2020-02-25T08:33:25Z Re: VTT termination with a single DDR4? https://community.nxp.com/t5/Layerscape/VTT-termination-with-a-single-DDR4/m-p/1004699#M5303 <HTML><HEAD></HEAD><BODY><P>Yes.</P></BODY></HTML> Tue, 25 Feb 2020 08:51:15 GMT https://community.nxp.com/t5/Layerscape/VTT-termination-with-a-single-DDR4/m-p/1004699#M5303 ufedor 2020-02-25T08:51:15Z