AR# 40501

MIG v3.3-3.61 Virtex-5 DDR2 SDRAM - Missing signal from sensitivity list

Description

When simulating a MIG Virtex-5 DDR2 design using ModelSim with the Synthesis check turned on, the following warning message is displayed:

Warning: /vobs/mlhw/puma/patriot/hw/ddr2_if/rtl/ddr2_phy_init.vhd(1174): (vcom-1400) Synthesis Warning: Signal "cal4_started_r" is read in the process but is not in the sensitivity list.

Can this warning message be safely ignored?

Solution

Yes, this warning message is safe to ignore.

It can also be worked around by adding "cal4_started_r" to the sensitivity list in phy_init.v/.vhd.

Was this Answer Record helpful?

AR# 40501
Date	08/19/2014
Status	Active
Type	General Article
Tools	ISE Design Suite - 12.4 ISE Design Suite - 13 ISE Design Suite - 13.1
IP	MIG

Page Bookmarked

AR# 40501

MIG v3.3-3.61 Virtex-5 DDR2 SDRAM - Missing signal from sensitivity list

Description

Solution

Applications

Products

Developer Zone

Support

About Xilinx