1 / 16

VHDL

VHDL. Fő témakörök : VHDL-en alapuló áramkörtervezés VHDL alapok Fejlett VHDL nyelvi szerkezetek Áramköri példák. Viselkedési. Szerkezeti. Process zorok, memóriák. Sorrendi programok. Regis z ter ek , multiplexerek. Regis z ter átvitelek. Kapuk , flip-flop ok.

kelly-shelton
Download Presentation

VHDL

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. VHDL Fő témakörök: • VHDL-en alapuló áramkörtervezés • VHDL alapok • Fejlett VHDL nyelvi szerkezetek • Áramköri példák

  2. Viselkedési Szerkezeti Processzorok, memóriák Sorrendi programok Regiszterek, multiplexerek Regiszter átvitelek Kapuk, flip-flopok Logikai egyenletek/FSM Tranzisztorok Átviteli függvények Cellalayout Modulok Chipek Kártyák Fizikai Gajski Y-diagrammja Az egyes tengelyek leírási típusokat képviselnek • Viselkedési • A bemenetek függvényében meghatározza a kimeneteket • Algoritmus, de nem megvalósítás • Szerkezeti • Megvalósítja a viselkedést az ismert viselkedésű összetevők összekötésével • Fizikai • Megadja a chipbeli összetevők és vezetékekméretété és elhelyezését • A tervezési folyamatot utazási útvonallal lehet ábrázolni

  3. A VHDL története • VHDL originated in the early 1980s • It is now accepted as one of the most important standard languages for • specifying • verifying • designing of electronics

  4. Tesztvektor generátor Végrehajtható előírás Eredmények, hibák = Finomított modellek sorozata Teszt-vektorok VégsőchipModell VHDL szimulációhoz & szintézishez

  5. VHDL szimulációhoz & szintézishez VHDL requirements for Simulation • Creation of testbenches => • File I/O • Detection of errors (function & timing) • Multiple simultaneous models • Combination of low & high level models (for efficiency)

  6. VHDL szimulációhoz & szintézishez VHDL requirements for HW Description • Behavioral models => • Combinatorial & Sequential Logic • RTL models • Structural models • Timing models

  7. VHDL szimulációhoz & szintézishez Requirements for VHDL Synthesis Tools • Pre- & post synthesis behavior should be identical • Synthesis should be efficient => • Requires interaction with place & route tools • Logic Synthesis • FSM Synthesis • Area & Timing Optimization

  8. Szabványosítás 1 • VHDL is an acronym of VHSIC Hardware Description Language • VHSIC is an acronym of Very High Speed Integrated Circuits • All the major tool manufacturers now support the VHDL standard • VHDL is now a standardized language, with the advantage that it it easy to move VHDL code between different commercial platforms (tools) => VHDL code is interchangeable among the different tools

  9. Szabványosítás 2 • It was the American Department of Defense which initiated the development of VHDL in the early 1980s because the US military needed a standardized method of describing electronic systems • VHDL was standardized in 1987 by the IEEE • IEEE Std-1076-1987 • ANSI Standard in 1988 • Added Support for RTL Design • VITAL: VHDL Initiative Towards ASIC Library • Revised version in 1993 • IEEE Std-1076-1993

  10. Szabványosítás 3 • 1995: • numeric_std/bit: IEEE-1076.3 • VITAL: IEEE-1076.4 • 1999: IEEE-1076.1 (VHDL-AMS ) • 2000: • IEEE-1076-2000 • IEEE-1076.1-2000 (VITAL-2000, SDF 4.0) • Added mixed-signal supportto VHDL in 2001 -> • VHDL-AMS • IEEE Std-1076.1-2001 • 2002: IEEE-1076-2002

  11. Tervezőeszközök • Good VHDL tools, and VHDL simulators in particular, have also been developed for PCs • Prices have fallen dramatically, enabling smaller companies to use VHDL, too • There are also PC synthesis tools, primarily for FPGAs and EPLDs

  12. Használat • High-tech companies • Texas Instruments, Intel use VHDL • mostEuropean companies use VHDL • Universities • VHDL groups to support new users

  13. IEEE • IEEE is the Institute of Electrical and Electronics Engineers • The reference manual is called IEEE VHDL Language Reference Manual Draft Standard version 1076/B • It was ratified in December 1987 as IEEE 1076-1987 • Important: the VHDL is standardized for system specification but not for design

  14. Technológia-függetlenség • The design of VHDL components can be technology-independent or more-or-less technology independent for a technical family • The components can be stored in a library for reuse in several different designs • VHDL models of commercial IC standard components can now be bought, which is a great advantage when it comes to verifying entire circuit boards

  15. Analóg világ • VHDL has not yet been standardized for analog electronics • Standardization is in progress on VHDL with an analog extension (AHDL) to allow analog systems to be described as well • This new standard will be based wholly on the VHDL standard and will have a number of additions for describing analog functions

  16. VHDL-Related Newsgroups • comp.arch.fpga • comp.lang.vhdl • comp.cad.synthesis

More Related