VHDL Issue Number:      2007

Language_Version:       VHDL-2002
Classification:         Language Modeling Enhancement or Deficiency
Summary:                VHDL needs to be enhanced to allow the modeling of switches.
Relevant_LRM_Sections:
Related_Issues:
Key_Words_and_Phrases:
Authors_Name:           Richard Munden
Authors_Phone_Number:   650-694-5523
Authors_Fax_Number:
Authors_Email_Address:  munden@vhdl.org
Authors_Affiliation:    Free Model Foundry
Authors_Address1:       PO Box 4562
Authors_Address2:       Mountain View
Authors_Address3:       CA  94040

Current Status:         Forwarded

Superseded By:

------------------------
Date Submitted:         8 October 2000
Date Analyzed:          29-Oct-04
Author of Analysis:     Peter Ashenden
Revision Number:        2
Date Last Revised:      05-November-04

Description of Problem
----------------------

I need to model digital switches.  This is very difficult in VHDL.

Proposed Resolution
-------------------
TBD

VASG-ISAC Analysis & Rationale
------------------------------

The VHDL-200x Modeling and Productivity group has a placeholder for a
proposal for bidirectional connections (switches, jumpers, resistors).
As of the date of this analysis, no work has been done in that group
on preparing proposals.

The proposed extension would significantly enhance the usability of
the language for switch-level and board-level modeling and should be
developed.


VASG-ISAC Recommendation for IEEE Std 1076-2002
-----------------------------------------------

No change.


VASG-ISAC Recommendation for Future Revisions
---------------------------------------------

The VHDL-200x Modeling and Productivity group should pursue proposals
for bidirectional connections.


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