External Memory Interface Handbook Volume 2: Design Guidelines

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

10.7.1. Signal Integrity Issues

Many design issues, including some at the protocol layer, can be traced back to signal integrity problems. You should check circuit board construction, power systems, command, and data signaling to determine if they meet specifications.

If infrequent, random errors exist in the memory subsystem, product reliability suffers. Check the bare circuit board or PCB design file. Circuit board errors can cause poor signal integrity, signal loss, signal timing skew, and trace impedance mismatches. Differential traces with unbalanced lengths or signals that are routed too closely together can cause crosstalk.

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