Intel® Agilex™ SEU Mitigation User Guide

ID 683128
Date 9/26/2022
Public
Document Table of Contents

2.3.1.4. Sensitivity Map Header Lookup

The .smh file represents a hash of the design's CRAM bit settings. The .smh file maps related groups of CRAM to a signal bit in the sensitivity array.

During an SEU, your application can look up the .smh file to determine if a bit is used. Using the bit location information, you can reduce the effective soft error rate in a running system.

The following criteria determine the criticality of a CRAM location in your design:

  • Routing—all bits that control a utilized routing line.
  • Adaptive logic modules (ALMs)—if you configure an ALM, the Advanced SEU Detection IP considers all CRAM bits related to that ALM as sensitive.
  • Logic array block (LAB) control lines—if you use an ALM in a LAB, the Advanced SEU Detection IP considers all bits related to the control signals feeding that LAB as sensitive.
  • M20K memory and digital signal processing (DSP) blocks—if you use a block, the Advanced SEU Detection IP considers all CRAM bits related to that block as sensitive.

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