Article ID: 000077552 Content Type: Error Messages Last Reviewed: 05/24/2023

Warning (15946): DQS_INPUT_FREQUENCY parameter of DQS delay chain should be equal to the INPUT_FREQUENCY parameter of DLL

Environment

    Quartus® II Subscription Edition
    DDR2 SDRAM Controller with ALTMEMPHY Intel® FPGA IP
BUILT IN - ARTICLE INTRO SECOND COMPONENT
Description

You might see the above warning when compiling an ALTMEMPHY-based DDR2 Controller in Arria® II GX devices:

Warning (15946): DQS_INPUT_FREQUENCY parameter of DQS delay chain should be equal to the INPUT_FREQUENCY parameter of DLL

Resolution

The warning is the result of number conversion errors inside the Quartus® II software and can be safely ignored.

Related Products

This article applies to 21 products

Arria® II GZ FPGA
Cyclone® IV GX FPGA
Cyclone® III FPGAs
Cyclone® II FPGA
Stratix® II FPGAs
Cyclone® IV E FPGA
Arria® II GX FPGA
Arria® V GX FPGA
Cyclone® III LS FPGA
Arria® V GT FPGA
Arria® V ST SoC FPGA
Arria® V SX SoC FPGA
Stratix® II GX FPGA
Stratix® III FPGAs
Stratix® V GT FPGA
Stratix® IV E FPGA
Stratix® V GX FPGA
Stratix® IV GT FPGA
Stratix® IV GX FPGA
Stratix® V E FPGA
Stratix® V GS FPGA

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