Device Family: Stratix® V, Stratix® V E, Stratix® V GS, Stratix® V GT, Stratix® V GX

Type: Answers

Area: EMIF, Intellectual Property


IP Product: DDR3 SDRAM Controller MegaCore supporting UniPHY

Error (170084): Can't route signal "|altdq_dqs2_stratixv:altdq_dqs2_inst|dqs_enable_int" to atom "|altdq_dqs2_stratixv:altdq_dqs2_inst|dqs_ff"

Description

When compiling a Stratix® V DDR3 UniPHY controller design in the Quartus® II software version 11.1 and 11.1SP1, you may get the following error message:

Error (170084): Can't route signal "<hierarchy>|altdq_dqs2_stratixv:altdq_dqs2_inst|dqs_enable_int" to atom "<hierarchy>|altdq_dqs2_stratixv:altdq_dqs2_inst|dqs_ff"

The error occurs when "enable read DQS tracking" is selected in the DDR3 Megawizard.

Workaround/Fix

The workaround is to uncheck "enable read DQS tracking" and regenerate the DDR3 UniPHY controller.

This issue is fixed in Quartus II software and IP version 11.1SP2.