Device Family: Arria® V GT, Arria® V GX, Arria® V ST, Arria® V SX, Cyclone® V

Intel Software: Quartus Prime Lite, Quartus Prime Standard

Area: EMIF


IP Product: DDR3 SDRAM Controller Supporting UniPHY
IP: DDR3 SDRAM Controller with UniPHY, LPDDR2 SDRAM Controller with UniPHY, DDR2 SDRAM Controller with UniPHY

Why do I see an efficiency issue when using the Arria® V and Cyclone® V hard memory controller with DQS tracking enabled?

Description

Arria® V and Cyclone® V DDR2,  DDR3/3L, and/or LPDDR2 designs with DQS tracking enabled may see reduced efficiency due to a long DQS tracking process where there is no periodic refresh being issued by the hard memory controller for a long period of time.

 

Workaround/Fix

Enable user auto-refresh options in the UniPHY IP.