Description

General Description: 

When default/initial values are declared, XST issues the following warning: 

"WARNING: Xst:854 - "file_name", Line #: Ignored initial statement."

Solution

XST can only use HDL initial conditions to setup the initial conditions of memory elements and unconnected ports. All other initial conditions will be ignored. For more information on initial conditions, refer to: 

(Xilinx Answer 18605) href='http://www.xilinx.com/support/answers/15149.htm' (Xilinx Answer 15149)