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AR# 15708

5.1i XST - XST does not always infer the FSM in my chosen coding style

Description

Keywords: XST, FSM, one-hot, 5.1i, sequential, grey, coding, code

Urgency: Standard

General Description:
XST does not always infer the FSM in my chosen coding style.

Solution

XST does not currently perform FSM synthesis if no reset signal exists. (The capability for FSM synthesis without a reset signal will be added to a future XST release.)

To work around this issue, manually set the encoding type using the ENUM_ENCODING attribute.

For more information about FSM encoding, please see Chapter 4 of the Synthesis and Simulation Design Guide at:
http://toolbox.xilinx.com/docsan/xilinx5/manuals.htm
AR# 15708
Date Created 09/27/2002
Last Updated 10/20/2005
Status Archive
Type General Article