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AR# 29173

LogiCORE FIFO Generator v4.1 - In VHDL behavioral simulation, DOUT powerup as "x" until the first word falls out

Description

For the First-Word-Fall-Through configurations with Embedded Registers, in the VHDL behavioral model simulation, DOUT powers-up as "x" until the first data falls out. The power-up value of DOUT is correct in the Verilog behavioral model.

Solution

This issue is seen only in behavioral simulation. Please use structual simulation model instead of behavioral simulation. The structural model can be generated by selecting Core Generator GUI, under Project Option, Generation Tab.

AR# 29173
Date Created 09/04/2007
Last Updated 12/15/2012
Status Active
Type General Article