https://community.nxp.com/t5/i-MX-Processors/DDR3-What-are-good-delay-windows/m-p/758902#M117995 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>after using the DDR Stress Tester to get calibration values for DDR3 according to "Freescale i.MX6 Port Application Guide - DDR3" I am wondering how to judge the resulting delay windows. In the document it says on freescale evaluation boards the window for DQS gating is 1.1 to 1.2 tCK and for read write delay it is 0.3 to 0 4 tCK. So this are good, acceptable values? I have nothing to compare it to. What windows are you getting on your designs?</P></BODY></HTML> Wed, 16 May 2018 08:04:37 GMT tkl 2018-05-16T08:04:37Z https://community.nxp.com/t5/i-MX-Processors/DDR3-What-are-good-delay-windows/m-p/758902#M117995 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>after using the DDR Stress Tester to get calibration values for DDR3 according to "Freescale i.MX6 Port Application Guide - DDR3" I am wondering how to judge the resulting delay windows. In the document it says on freescale evaluation boards the window for DQS gating is 1.1 to 1.2 tCK and for read write delay it is 0.3 to 0 4 tCK. So this are good, acceptable values? I have nothing to compare it to. What windows are you getting on your designs?</P></BODY></HTML> Wed, 16 May 2018 08:04:37 GMT https://community.nxp.com/t5/i-MX-Processors/DDR3-What-are-good-delay-windows/m-p/758902#M117995 tkl 2018-05-16T08:04:37Z https://community.nxp.com/t5/i-MX-Processors/DDR3-What-are-good-delay-windows/m-p/758903#M117996 <HTML><HEAD></HEAD><BODY><P>Hi Torben</P><P></P><P>yes these margin values which gives MX6 DRAM Port Application Guide-DDR3</P><P>on p.14,17 are good and recommended</P><P><A href="https://community.nxp.com/docs/DOC-101708">Freescale i.MX6 DRAM Port Application Guide-DDR3</A>&nbsp;</P><P><span class="lia-inline-image-display-wrapper" image-alt="pastedImage_2.jpg"><img src="https://community.nxp.com/t5/image/serverpage/image-id/5767i92F203FB65B0DB4E/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_2.jpg" alt="pastedImage_2.jpg" /></span></P><P></P><P>Best regards<BR />igor<BR />-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Fri, 18 May 2018 02:53:12 GMT https://community.nxp.com/t5/i-MX-Processors/DDR3-What-are-good-delay-windows/m-p/758903#M117996 igorpadykov 2018-05-18T02:53:12Z