Article ID: 000073981 Content Type: Troubleshooting Last Reviewed: 08/25/2020

What can I do if HPS DDR calibration fail when Early I/O release is enabled on Intel® Arria® 10 SX 270/320/480 devices?

Environment

  • Intel® Quartus® Prime Pro Edition
  • Intel® SoC FPGA Embedded Development Suite (SoC EDS) Pro Edition
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    Description

    When the Early I/O release feature is enabled, there may be an occasion where HPS DDR calibration fails after peripheral RBF file is configured on Intel® Arria® 10 SX devices such as 270/320/480. When this happens, Uboot prints out a message as shown below.

    Error: Could Not Calibrate SDRAM

    DDRCAL: Failed

     

    Resolution

    If this problem occurs, please try to use a cdratio value other than 8 when configuring periph.rbf. Using cdratio=4 is recommended. If it fails again, then try cdratio=2 and cdratio=1. Set cdratio=8 when configuring core.rbf. These changes can be done in /uboot-socfpga/arch/arm/cpu/armv7/socfpga_arria10/fpga_manager.c or /u-boot-socfpga/drivers/fpga/socfpga_arria10.c.

    Related Products

    This article applies to 1 products

    Intel® Arria® 10 SX SoC FPGA

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