Article ID: 000082851 Content Type: Error Messages Last Reviewed: 08/03/2023

Error: The parameter MEM_CS_WIDTH (Number of chip-selects per device/DIMM) must be set to 2 or greater for RDIMM/LRDIMM devices

Environment

    Quartus® II Subscription Edition
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Description

You may experience the above error when the Memory Format option is set to Registered DIMM for your DDR2 UniPHY-based controller in the Quartus® II software version 12.1 and later. 

The error occurs when the Number of chip-select per device/DIMM option is set to 1. 

Resolution

The workaround is to generate the DDR2 UniPHY-based controller with two chip-selects and ignore the second chip-select signal from the controller.

Related Products

This article applies to 8 products

Stratix® IV GX FPGA
Stratix® V E FPGA
Stratix® V GS FPGA
Stratix® V GT FPGA
Stratix® V GX FPGA
Arria® V GZ FPGA
Stratix® IV E FPGA
Stratix® IV GT FPGA

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