VHDLReport.pdf

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The VHDL Standard

An overview of activities,

organizations and European tool efforts

Author:

C. Meersman, E2S n.v.

ESA Contract Number:

10208/92/NL/FM, SCADES 2, Work Order 5

Contracts Officer:

F. Mazzaglia (ECT)

Technical Officer:

P. Sinander (WDN)

Document Reference:

E2S/ESTEC/SCADES 2/WO5-D1

Document Version:

1.1

Document Release Date:

30 May 1994

EUROPEAN SPACE AGENCY

CONTRACT REPORT

The work described in this report was done under ESA

contract. Responsibility for the contents resides in the

organization that prepared it.

E2S n.v. - Software Engineering

ABSTRACT

This report is deliverable WO5-D1 resulting from the work packages 5100 and 5200 of

Work Order 5 in the ESTEC/WDN/SCADES 2 contract.

The report gives an overview of activities, organizations and European tool efforts related

to the VHDL standard. An extensive list of contact points and additional information

sources allowing further in-depth studies has been included. The report is not an

introduction to VHDL, its usage or its various application areas.

This document is a synthesis of information collected from many sources and documents.

E2S would like to thank the many individuals who provided inputs to the report. Thanks

also goes to Peter Sinander (ESTEC) for the constructive comments he provided on the

draft version of the report.

E2S/ESTEC/SCADES 2/WO5-D1 - 1.1

iii

E2S/ESTEC/SCADES 2/WO5-D1 - 1.1

E2S n.v. - Software Engineering

Table of contents

ABSTRACT ...................................................... iii

1 INTRODUCTION ................................................ 1

2 STATUS OF THE VHDL STANDARD ................................. 3

2.1 VHDL IEEE Std 1076-1987 ...................................... 3

2.2 VHDL IEEE Std 1076-1993 ...................................... 4

2.2.1 Reflections on VHDL ’93 ................................... 6

2.3 Extensions to VHDL ........................................... 7

2.3.1 Analog VHDL (VHDL-A) Working Group ........................ 7

2.3.2 Shared Variables Working Group ............................. 8

2.4 Definition of Standard Practices .................................. 9

2.4.1 Mathematical Package Working Group ......................... 9

2.4.2 Synthesis Package Working Group ........................... 11

2.4.3 The VHDL Timing Working Group / VITAL ...................... 12

2.4.4 VHDL Utility Library Working Group ........................... 13

2.4.5 VHDL Test Study Group ................................... 14

2.4.6 Std_logic_1164 Package (IEEE Std 1164-1993) .................. 14

2.4.7 WAVES, Waveform and Vector Exchange Specification (IEEE Std 1029.1-

1991) ................................................. 15

3 ORGANIZATIONS DEALING WITH VHDL .............................. 17

3.1 VI, VHDL International ......................................... 17

3.2 ECSI, the European CAD Standardization Initiative .................... 20

3.2.1 Introduction ............................................. 20

3.2.2 Relationship with other organizations .......................... 20

3.2.3 ECSI Objectives ......................................... 21

3.2.4 ECSI Activities .......................................... 22

3.2.4.1 The VHDL Technical Centres .......................... 22

3.2.4.2 Information Modelling ............................... 23

3.3 VFE, the VHDL-Forum for CAD in Europe ........................... 23

3.4 AVI, the Analog VHDL International Consortium ....................... 25

3.5 EIA, the Electronic Industries Association ........................... 26

3.6 DoD, the U.S. Department of Defense .............................. 26

3.7 United States Government ...................................... 27

E2S/ESTEC/SCADES 2/WO5-D1 - 1.1

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