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AR# 22761

9.2i XST - FSM is not encoded by XST when there is no initial condition

Description

I coded to infer two FSMs in the code, but XST encodes only one FSM.

What causes this problem?

Solution

XST can infer an FSM only if there is a power-up state or reset condition; when this is not the case, XST cannot infer an FSM. Refer to the ISE Language Templates for examples of coding state machines with reset conditions.

AR# 22761
Date Created 09/04/2007
Last Updated 12/15/2012
Status Active
Type General Article