i.MX6D - DDR差分时钟终端电阻

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i.MX6D - DDR差分时钟终端电阻

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Contributor I

         在i.MX6D的参考设计中,DDR的差分时钟要求要有终端电阻200Ω,如图片中R118和R43。请问这个终端电阻的作用是什么?如果不加这个终端电阻,可能会有什么风险?谢谢!

TIM截图20200103134021.jpg

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NXP TechSupport
NXP TechSupport

Hi jcteng

these resistors are used for decreasing signal reflections and improving

signal shape.

Best regards
igor
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