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AR# 20366

7.1i XST - XST does not process the "default"/"when others" constructs to implement a safe finite state machine

Description

Keywords: VHDL, Verilog, FSM

XST does not process the "default"/ "when others" constructs to implement a safe finite state machine.

Solution

XST has added two new synthesis constraints: "safe_recovery_state" and "safe_implementation," so that a safe finite state machine can be created. For more information on these two constraints, see the XST User Guide and the Constraints Guide, found at:
http://www.xilinx.com/support/software_manuals.htm
AR# 20366
Date Created 09/03/2007
Last Updated 01/07/2009
Status Archive
Type General Article