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AR# 23211

8.2i Simulation - Known Issues with ISE Simulation Libraries

Description


Keywords: simulation, model, problem, Virtex-5

This Answer Record covers all the Known Issues for Unisim/Simprim in ISE 8.2i.

Solution

Q1. The Virtex-5 VHDL BlockRAM does not have collision checks.
A1. This is a known limitation with the model that will be fixed in ISE 9.1i.

Q2. The Virtex-4 BlockRAM cannot be used with Modelsim's Memory Editor Window.
A2. This is a known issue where the RAMB16 is not coded to use 2-D arrays. This issue will be fixed in ISE 9.1i

Q3. The VHDL Sysmon does not work correctly.
A3. This is a known limitation with the VHDL model that will be fixed in ISE 9.1i.
AR# 23211
Date Created 09/04/2007
Last Updated 10/16/2008
Status Archive
Type General Article