AR# 4871

F1.5, State Editor: Synthesis -> Options to set encoding scheme has no effect

描述

Keywords: fsm, one-hot, binary, encoding, vhdl, express

Urgency: standard

General Description: When doing an FSM in State Editor for VHDL, there are 2 places where the user may choose the FSM encoding scheme:
* Synthesis -> Options
or
* FSM -> Machines -> <fsm_name> (Machine Properties dialog box)

Only the latter method has any effect on the synthesized design.
State Editor uses the Synopsys attributes package to explicitly define the encoding, and therefore the synthesis options' FSM extraction encoding option doesn't have any effect.

解决方案

When setting the desired encoding scheme for the State Machine, use the
following methodology:

FSM -> Machines -> <machine_name>

Choose the appropriate encoding scheme in the Machine Properties dialog.
AR# 4871
日期 03/07/2002
状态 Archive
Type 综合文章