External Memory Interface Handbook Volume 2: Design Guidelines

ID 683385
Date 5/08/2017
Document Table of Contents

2.5. Layout Approach5.7. Layout Approach

For all practical purposes, you can regard the TimeQuest timing analyzer's report on your memory interface as definitive for a given set of memory and board timing parameters.

You will find timing under Report DDR in TimeQuest and on the Timing Analysis tab in the parameter editor.

The following flowchart illustrates the recommended process to follow during the board design phase, to determine timing margin and make iterative improvements to your design.

Board Skew

For information on calculating board skew parameters, refer to Implementing and Parameterizing Memory IP, in the External Memory Interface Handbook .

The Board Skew Parameter Tool is an interactive tool that can help you calculate board skew parameters if you know the absolute delay values for all the memory related traces.

Memory Timing Parameters

For information on the memory timing parameters to be entered into the parameter editor, refer to the datasheet for your external memory device.

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