vhdl教程.pdf

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J …P7 09 0;,32-4..0/:9 995..0/:9=0;,3 SH l CIC Design Flow l VHDL Syntax l Synthesis Constrains l Frequency Used Designs l VHDL System Simulator (VSS) l LAB Excise

VHDL: Day1 l Introduction l CIC Design Flow l VHDL – Basic – Data Types & Operators – Structural Modeling l Basic Concepts of VSS VHDL: Day2 l VHDL Syntax – Sequential Statements – Concurrent Statements l Design Recommendations l Frequency Used Circuits Modeling

VHDL vs. Verilog VHDL vs. Verilog ' '074 425,943 -7,708 #08:,-9 #0,/,-9 ,8 94 0,73 Less intuitive EA SY Compile Y es Package A D A interpretative N o `include C & A D A

VHDL vs. Verilog l USA-IBM, TI, AT&T, INTEL… l USA-Silicon Valley l Europe l Japan l Korea l Taiwan VHDL Advantages l Clear definition of design requirements l Efficiency in design cycle time l Flexibility in adapting to design changes l Reuse of designs and packages l Technology independent l Easy analysis of various architecture/implementations

VHDL Advantages l Design verification and auto-regression tests l VHDL is recommended for government contracts l VHDL commercial models are available for purchase l VHDL is a documentation language l VHDL is a simulation language VHDL History l 1980 – The USA Department of Defense (DOD) – project under the Very High Speed Integrated Circuit (VHSIC)

VHDL History l 1983 – IBM, Texas Instruments and Intermetrics. – The DOD mandated that all digital electronic circuits be described in VHDL. – IEEE standard 1076. l The F22 advanced tactical fighter aircraft F22 Raptor l YF-23 1990/8 l 8B YF-22 1990/9 l 92/4/24 10m high pitch too much and crash for 2000m, can repair l 750->648->422->339 (1 9T l 1997/9/7 l 2000HDB l 2013;«M

F22 Raptor l 2 Common Integrated Processors, CIP l KH l 1.050 S/ l Memory 300MB l 170T – 88.6%FI^ – 1=^Œ l Language ADA F22 ADF from DID http://www.did.com

VHDL History l 1993 – IEEE 1076 '93. l 1996 – Both commercial simulation and synthesis tools became available adhering to IEEE 1076 '93 standard. – A VHDL package for use with synthesis tools, IEEE 1076.3. – IEEE 1076.4 (VITAL) VHDL History l 1997 VHDL-AMS

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