Type: Answers, Errata

Area: EMIF, Intellectual Property



Need to Manually Connect Memory Model

Description

When you attempt to generate a DDR with ALTMEMPHY design with Qsys and set the Create testbench Qsys system option to any value other than None, the system fails to connect a memory model to the Qsys-generated testbench.

This issue affects all ALTMEMPHY designs targeting DDR memory devices.

Simulation does not complete properly.

Workaround/Fix

Manually instantiate the generated memory model (<instance_name>_mem_model.v/.vhd) in the Qsys-generated testbench (<instance_name>_tb.v/.vhd) .

This issue will be fixed in a future version of the DDR and DDR2 SDRAM Controllers with ALTMEMPHY IP.