External Memory Interface Handbook Volume 2: Design Guidelines

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

9.13.2.3. Intersymbol Interference

ISI parameters are similarly auto-populated based on the number of ranks you select with Intel's PCB simulations. You can update these autopopulated typical values, if more accurate dedicated simulation results are available.

Intel recommends performing board-level simulations to calculate the slew rate and ISI deltas that account for accurate board level effects for your board. You can use HyperLynx or similar simulators to obtain these simulation numbers. The default values have been computed using HyperLynx simulations for Intel boards with multiple DDR2 and DDR3 SDRAM slots.

The wizard writes these parameters for the slew rates and the ISI into the .sdc and they are used during timing analysis.

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