Article ID: 000076613 Content Type: Troubleshooting Last Reviewed: 02/28/2019

Why does the EMIF Debug Toolkit report that the Intel® Stratix® 10 DDR4 CKE*, ODT*, and RESET signals are uncalibrated?

Environment

  • Intel® Quartus® Prime Pro Edition
  • External Memory Interfaces Intel® Stratix® 10 FPGA IP
  • BUILT IN - ARTICLE INTRO SECOND COMPONENT
    Description

    The EMIF Debug Toolkit doesn't deskew the Intel® Stratix® 10 DDR4 CKE* and ODT* signals directly because the DDR4 specification doesn't include them in the address / command parity calculation.

    In the Address / Command Margins section, the EMIF Debug Toolkit reports all the signals that could possibly have a delay, but the margins are only reported on signals that are calibrated explicitly.
    However, the CKE*, ODT*, and RESET signals are calibrated implicitly based on the CS* level / deskew, and therefore, the margins for these signals aren't reported.
    The CKE*, ODT*, and RESET signals are programmed with the same delay setting value as the CS* signals.

    Note that the character * refers to the memory rank number.

    Related Products

    This article applies to 1 products

    Intel® Stratix® 10 FPGAs and SoC FPGAs