Device Family: Arria® II GZ

Device Family: Arria® V GT

Device Family: Arria® V GX

Device Family: Arria® V GZ

Device Family: Arria® V ST

Device Family: Arria® V SX

Device Family: Cyclone® V E

Device Family: Cyclone® V GT

Device Family: Cyclone® V GX

Device Family: Cyclone® V SE

Device Family: Cyclone® V ST

Device Family: Cyclone® V SX

Device Family: Stratix® III

Device Family: Stratix® IV E

Device Family: Stratix® IV GT

Device Family: Stratix® IV GX

Device Family: Stratix® V E

Device Family: Stratix® V GS

Device Family: Stratix® V GT

Device Family: Stratix® V GX

Type: Answers

Area: EMIF

Area: Intellectual Property


IP Product: RLDRAM II Controller with UniPHY

ERR_MaxRefsPostponed :: More than a total of 8 Refresh commands postponed by more then trefi = <trefi_value> ns

Description

This error may be seen while simulating your memory controller using a vendor memory model. Altera does not officially support vendor memory models. However, if you choose to use them, the UniPHY-based memory controllers do not perform REFRESH cycles during calibration. The vendor memory model might expect REFRESH cycles and when it detects a REFRESH command, it assumes the controller is postponing the REFRESH command. After the max number of postponements are reached, the vendor model generates a ERR_MaxRefsPostponed error.

Workaround/Fix

To work around these error messages, you may ignore or suppress the ERR_MaxRefsPostponed error message during calibration.