Knowledge Base Article

Why do TdiVW_total and VdiVW_total in the External Memory Interfaces IP GUI not change when the selected memory preset speed bin changes?

Description

In the Quartus® Prime Software, when you access the External Memory Interfaces intellectual property (IP) graphical user interface (GUI) and click on the Mem Timing tab, there are two parameters: TdiVW_total and VdiVW_total. These parameter values do not change when you change the memory device preset. This is incorrect, as according to the JEDEC standard, these parameters depend on the memory speed bin.

Resolution

You should always provide the TdiVW_total and VdiVW_total values according to the memory device datasheet.

This problem is fixed beginning with the Quartus® Prime Pro Edition Software version 22.4.

Updated 3 months ago
Version 2.0
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