We have detected your current browser version is not the latest one. Xilinx.com uses the latest web technologies to bring you the best online experience possible. Please upgrade to a Xilinx.com supported browser:Chrome, Firefox, Internet Explorer 11, Safari. Thank you!

AR# 37635

12.2 - NGDBUILD:931 SIM_DEVICE has been changed to correct post ngdbuild and timing simulation for this primitive


When using the Spartan 6 PLL_BASE I am receiving the following warning in NGDBUILD:

WARNING:NGDBUILD:931 - The value of SIM_DEVICE on instance 'a' of type pll_adv has been changed from 'Virtex 5' to 'Spartan 6' to correct post-ngdbuild and timing simulation for this primitive.
In order for functional simulation to be correct, the value of SIM_DEVICE should be changed in this same manner in the source netlist or constraint file.

Why is this warning issued, when I am using a PLL_BASE and there is no sim_device attribute?


This warning can be ignored as the PLL_BASE functionality in simulation is the same for Virtex 5 and Spartan 6.

The SIM_DEVICE only affects the DRP behavior.
AR# 37635
Date 09/25/2014
Status Active
Type Known Issues