1. Using the for-generahon scheme, concurrent statements can be replicated a predetermined number of times.
|
|
|
- Lynne Shepherd
- 6 years ago
- Views:
Transcription
1 Generate Statements Concurrent statements can be conditionally selected or replicated during the elaboration phase using the generate statement. There are two forms of the generate statement. 1. Using the for-generahon scheme, concurrent statements can be replicated a predetermined number of times. 2. With the if-generation scheme, concurrent statements can be conditionally selected for execution. The generate statement is interpreted during elaboration, and therefore, has no simulation semantics associated with it. It resembles a macro expansion. The generate statement provides for a compact description of regular structures such as memories, registers, and counters. The format of a generate statement using the for-generation scheme is generate-label: for generale-identifierin discrete-range generate concurrent-statements end generate [ generate-label]; The values in the discrete range must be globally static, that is, they must be computable at elaboration time. During elaboration, the set of concurrent statements are replicated once for each value in the discrete range. These statements can also use the generate identifier in their expressions and its value would be substituted during elaboration for each replication. There is an implicit declaration for the generate identifier within the generate statement, and therefore, no declaration for this identifier is required. The type of the identifier is defined by the discrete range. Consider the following representation of a 4-bit full-adder, shown in Fig., using the generate statement. entity FULL_ADD4 is port (A, B: in BIT_VECTOR(3 downto 0); CIN: in BIT; SUM: out BIT_VECTOR(3 downto 0); COUT: out BIT);
2 end FULL_ADD4: architecture FOR_GENERATE of FULL_ADD4 is component FULL_ADDER port (A, B, C: in BIT; COUT, SUM: out BIT); end component; signal CAR: BIT_VECTOR(4 downto 0); CAR(0) <= CIN; GK: for K in 3 downto 0 generate FA: FULL_ADDER port map (CAR(K), A(K), B(K), CAR(K+1),SUM(K)); end generate GK; COUT <= CAR(4); end FOR_GENERATE; After elaboration, the generate statement is expanded to FA(3): FULL_ADDER port map (CAR(3), A(3), B(3), CAR(4), SUM(3)); FA(2): FULL_ADDER port map (CAR(2), A(2), B(2), CAR(3), SUM(2)); FA(1): FULL_ADDER port map (CAR(1), A(1), B(1), CAR(2), SUM(1)); FA(0): FULL_ADDER port map (CAR(0), A(0), B(0), CAR(1), SUM(0)); The second form of the generate statement uses the if-generation scheme. The format for this type of generate statement is genarate-label: IF expression generate concurrent-statements end generate [ generete-label ] ; The if-generate statement allows for conditional selection of concurrent statements based on the value of an expression. This expression must be a globally static expression, that is, the value must be computable at elaboration time. Here is an example of a 4-bit counter, shown in Fig. 1.2, that is modeled using the if-generate statement.
3 Block Statement Formal Definition The block statement is a representation of design or hierarchy section, used for partitioning architecture into self-contained parts. Simplified Syntax block_label : block (optional_guard_condition) declarations concurrent statements end block block_label; Description
4 The block statement is a way of grouping concurrent statements in an architecture. There are two main purposes for using blocks: to improve readability of the specification and to disable some signals by using the guard expression (see guard for details). The main purpose of block statement is organisational only - introduction of a block does not directly affect the execution of a simulation model. For example, both the upper and lower sections of code in Example 1 will generate the same simulation results. Each block must be assigned a label placed just before the block reserved word. The same label may be optionally repeated at the end of the block, right after the end blockreserved words. A block statement can be preceded by two optional parts: a header and a declarative part. The latter allows to introduce declarations of subprograms, types, subtypes, constants, signals, shared variables, files, aliases, components, attributes, configurations, disconnections, use clauses and groups (i.e. any of the declarations possible for an architecture). All declarations specified here are local to the block and are not visible outside it. A block header may contain port and generic declarations (like in an entity), as well as so called port map and generic map declarations. The purpose of port map and generic mapstatements is to map signals and other objects declared outside of the block into the ports and generic parameters that have been declared inside of the block, respectively. This construct, however, has only a small practical importance. The Example 2 illustrates typical block declarations. If an optional guard condition is specified at the ning of the block then this block becomes a guarded block. See guard for details. The statements part may contain any concurrent constructs allowed in an architecture. In particular, other block statements can be used here. This way, a kind of hierarchical structure can be introduced into a single architecture body. Example 1 A1: OUT1 <= '1' after 5 ns; LEVEL1 : block A2: OUT2 <= '1' after 5 ns; A3: OUT3 <= '0' after 4 ns; end block LEVEL1; A1: OUT1 <= '1' after 5 ns; A2: OUT2 <= '1' after 5 ns; A3: OUT3 <= '0' after 4 ns; Both pieces of code above will behave in exactly the same way during simulation - block construct only separates part of the code without adding any functionality. Example 2 entity X_GATE is generic (LongTime : Time; ShortTime : Time); port (P1, P2, P3 : inout BIT);
5 end X_GATE; architecture STRUCTURE of X_GATE is -- global declarations of signal: signal A, B : BIT; LEVEL1 : block -- local declaration of generic parameters generic (GB1, GB2 : Time); -- local binding of generic parameters generic map (GB1 => LongTime, GB2 => ShortTime); -- local declaration of ports port (PB1: in BIT; PB2 : inout BIT ); -- local binding of ports and signals port map (PB1 => P1, PB2 => B); -- local declarations: constant Delay : Time := 1 ms; signal S1 : BIT; S1 <= PB1 after Delay; PB2 <= S1 after GB1, P1 after GB2; end block LEVEL1; end architecture STRUCTURE; The signals PB1 and PB2 have here the same values as P1 and B (in port map statement), respectively, and the generics GB1 and GB2 (see generic map statement) have the same values as LongTime and ShortTime, respectively. However, such assignment is redundant because a block may use any declarations of an entity, including generics and ports. TheExample 2 is presented here only for illustration purpose of the block syntax. Important Notes Guarded blocks are generally not synthesizeable. Unguarded blocks are usually ignored by synthesis tools. It is strongly recommended NOT to use blocks in non-vital designs - the package Std_logic_1164 supports mechanisms and multiple value logic which make the reserved words bus, disconnect, guarded and register unnecessary. Also, instead of guarded blocks for modelling sequential behaviour it is recommended to used clocked processes. VITAL specifications require the use of blocks. VHDL supports a more powerful mechanism of design partitioning which is called component instantiation. Component instantiation allows connecting a component reference in one entity with its declaration in another entity.
6
CONCURRENT STATEMENTS GENERATE STATEMENTS
CONCURRENT STATEMENTS GENERATE STATEMENTS Generate Statements Concurrent statements can be conditionally selected or replicated using the generate statement Generate is a concurrent statement containing
0. Overview of this standard Design entities and configurations... 5
Contents 0. Overview of this standard... 1 0.1 Intent and scope of this standard... 1 0.2 Structure and terminology of this standard... 1 0.2.1 Syntactic description... 2 0.2.2 Semantic description...
Contents. Appendix D VHDL Summary Page 1 of 23
Appendix D VHDL Summary Page 1 of 23 Contents Appendix D VHDL Summary...2 D.1 Basic Language Elements...2 D.1.1 Comments...2 D.1.2 Identifiers...2 D.1.3 Data Objects...2 D.1.4 Data Types...2 D.1.5 Data
CONCURRENT STATEMENTS SELECTIVE SIGNAL ASSIGNMENT
CONCURRENT STATEMENTS SELECTIVE SIGNAL ASSIGNMENT 2 Cristian Sisterna Selective Signal Assignment Syntax with select target_signal
Hardware Description Language VHDL (1) Introduction
Hardware Description Language VHDL (1) Introduction Digital Radiation Measurement and Spectroscopy NE/RHP 537 Introduction Hardware description language (HDL) Intended to describe circuits textually, for
Basic Language Concepts
Basic Language Concepts Sudhakar Yalamanchili, Georgia Institute of Technology ECE 4170 (1) Describing Design Entities a sum b carry Primary programming abstraction is a design entity Register, logic block,
Digital Systems Design
Digital Systems Design Review of Combinatorial Circuit Building Blocks: VHDL for Combinational Circuits Dr. D. J. Jackson Lecture 2-1 Introduction to VHDL Designer writes a logic circuit description in
VHDL Structural Modeling II
VHDL Structural Modeling II ECE-331, Digital Design Prof. Hintz Electrical and Computer Engineering 5/7/2001 331_13 1 Ports and Their Usage Port Modes in reads a signal out writes a signal inout reads
Review. LIBRARY list of library names; USE library.package.object; ENTITY entity_name IS generic declarations PORT ( signal_name(s): mode signal_type;
LIBRARY list of library names; USE library.package.object; Review ENTITY entity_name IS generic declarations PORT ( signal_name(s): mode signal_type; signal_name(s) : mode signal_type); END ENTITY entity_name;
Concurrent Signal Assignment Statements (CSAs)
Concurrent Signal Assignment Statements (CSAs) Digital systems operate with concurrent signals Signals are assigned values at a specific point in time. VHDL uses signal assignment statements Specify value
COE 405, Term 062. Design & Modeling of Digital Systems. HW# 1 Solution. Due date: Wednesday, March. 14
COE 405, Term 062 Design & Modeling of Digital Systems HW# 1 Solution Due date: Wednesday, March. 14 Q.1. Consider the 4-bit carry-look-ahead adder (CLA) block shown below: A 3 -A 0 B 3 -B 0 C 3 4-bit
Introduction to VHDL. Main language concepts
Introduction to VHDL VHSIC (Very High Speed Integrated Circuit) Hardware Description Language Current standard is IEEE 1076-1993 (VHDL-93). Some tools still only support VHDL-87. Tools used in the lab
Chapter 6 Combinational-Circuit Building Blocks
Chapter 6 Combinational-Circuit Building Blocks Commonly used combinational building blocks in design of large circuits: Multiplexers Decoders Encoders Comparators Arithmetic circuits Multiplexers A multiplexer
EE 459/500 HDL Based Digital Design with Programmable Logic. Lecture 4 Introduction to VHDL
EE 459/500 HDL Based Digital Design with Programmable Logic Lecture 4 Introduction to VHDL Read before class: Chapter 2 from textbook (first part) Outline VHDL Overview VHDL Characteristics and Concepts
COE 405 Design Methodology Based on VHDL
COE 405 Design Methodology Based on VHDL Dr. Aiman H. El-Maleh Computer Engineering Department King Fahd University of Petroleum & Minerals Outline Elements of VHDL Top-Down Design Top-Down Design with
Lecture 3: Modeling in VHDL. EE 3610 Digital Systems
EE 3610: Digital Systems 1 Lecture 3: Modeling in VHDL VHDL: Overview 2 VHDL VHSIC Hardware Description Language VHSIC=Very High Speed Integrated Circuit Programming language for modelling of hardware
C-Based Hardware Design
LECTURE 6 In this lecture we will introduce: The VHDL Language and its benefits. The VHDL entity Concurrent and Sequential constructs Structural design. Hierarchy Packages Various architectures Examples
HIERARCHICAL DESIGN. RTL Hardware Design by P. Chu. Chapter 13 1
HIERARCHICAL DESIGN Chapter 13 1 Outline 1. Introduction 2. Components 3. Generics 4. Configuration 5. Other supporting constructs Chapter 13 2 1. Introduction How to deal with 1M gates or more? Hierarchical
Outline HIERARCHICAL DESIGN. 1. Introduction. Benefits of hierarchical design
Outline HIERARCHICAL DESIGN 1. Introduction 2. Components 3. Generics 4. Configuration 5. Other supporting constructs Chapter 13 1 Chapter 13 2 1. Introduction How to deal with 1M gates or more? Hierarchical
2/14/2016. Hardware Synthesis. Midia Reshadi. CE Department. Entities, Architectures, and Coding.
Hardware Synthesis MidiaReshadi CE Department Science and research branch of Islamic Azad University Email: ce.srbiau@gmail.com Midia Reshadi 1 Chapter 2 Entities, Architectures, and Coding Styles Midia
The Designer's Guide to VHDL Second Edition
The Designer's Guide to VHDL Second Edition Peter J. Ashenden EDA CONSULTANT, ASHENDEN DESIGNS PTY. VISITING RESEARCH FELLOW, ADELAIDE UNIVERSITY Cl MORGAN KAUFMANN PUBLISHERS An Imprint of Elsevier SAN
Digital Design Using VHDL Using Xilinx s Tool for Synthesis and ModelSim for Verification Part II
Digital Design Using VHDL Using Xilinx s Tool for Synthesis and ModelSim for Verification Part II Ahmed Abu-Hajar, Ph.D. abuhajar@digitavid.net Digitavid, Inc San Jose, CA VHDL Lexical Description Code
What Is VHDL? VHSIC (Very High Speed Integrated Circuit) Hardware Description Language IEEE 1076 standard (1987, 1993)
What Is VHDL? VHSIC (Very High Speed Integrated Circuit) Hardware Description Language IEEE 1076 standard (1987, 1993) Only possible to synthesize logic from a subset of VHDL Subset varies according to
Abi Farsoni, Department of Nuclear Engineering and Radiation Health Physics, Oregon State University
Hardware description language (HDL) Intended to describe circuits textually, for a computer to read Evolved starting in the 1970s and 1980s Popular languages today include: VHDL Defined in 1980s by U.S.
Subprograms, Packages, and Libraries
Subprograms, Packages, and Libraries Sudhakar Yalamanchili, Georgia Institute of Technology ECE 4170 (1) function rising_edge (signal clock: std_logic) return boolean is declarative region: declare variables
Embedded Systems CS - ES
Embedded Systems - 1 - REVIEW Hardware/System description languages VDHL VHDL-AMS SystemC TLM - 2 - VHDL REVIEW Main goal was modeling of digital circuits Modelling at various levels of abstraction Technology-independent
Introduction to the VHDL language. VLSI Digital Design
Introduction to the VHDL Hardware description language 1. Introduction 2. Basic elements 3. Scalar data types 4. Composed data types 5. Basic constructs (system definition) 6. Data flow description level
CprE 583 Reconfigurable Computing
Recap Moore FSM Example CprE / ComS 583 Reconfigurable Computing Moore FSM that recognizes sequence 10 0 1 0 1 S0 / 0 S1 / 0 1 S2 / 1 Prof. Joseph Zambreno Department of Electrical and Computer Engineering
EE 595. Part II Design Units in VHDL. EE 595 EDA / ASIC Design Lab
EE 595 Part II Design Units in VHDL Design Units There are five type of design units in VHDL: Entities Architectures Packages Package Bodies Configurations Entities and architectures are the only two design
Lecture 7. Standard ICs FPGA (Field Programmable Gate Array) VHDL (Very-high-speed integrated circuits. Hardware Description Language)
Standard ICs FPGA (Field Programmable Gate Array) VHDL (Very-high-speed integrated circuits Hardware Description Language) 1 Standard ICs PLD: Programmable Logic Device CPLD: Complex PLD FPGA: Field Programmable
Lecture 9. VHDL, part IV. Hierarchical and parameterized design. Section 1 HIERARCHICAL DESIGN
Lecture 9 VHDL, part IV Hierarchical and parameterized design Section 1 HIERARCHICAL DESIGN 2 1 Dealing with Large Digital System Design 1. Apply hierarchy to the design At the highest level use larger
VHDL simulation and synthesis
VHDL simulation and synthesis How we treat VHDL in this course You will not become an expert in VHDL after taking this course The goal is that you should learn how VHDL can be used for simulation and synthesis
Basic Language Constructs of VHDL
Basic Language Constructs of VHDL Chapter 3 1 Outline 1. Basic VHDL program 2. Lexical elements and program format 3. Objects 4. Data type and operators Chapter 3 2 1. Basic VHDL program Chapter 3 3 Design
ECE U530 Digital Hardware Synthesis. Course Accounts and Tools
ECE U530 Digital Hardware Synthesis Prof. Miriam Leeser mel@coe.neu.edu Sept 13, 2006 Lecture 3: Basic VHDL constructs Signals, Variables, Constants VHDL Simulator and Test benches Types Reading: Ashenden
EECE-4740/5740 Advanced VHDL and FPGA Design. Lecture 3 Concurrent and sequential statements
EECE-4740/5740 Advanced VHDL and FPGA Design Lecture 3 Concurrent and sequential statements Cristinel Ababei Marquette University Department of Electrical and Computer Engineering Overview Components hierarchy
Declarations of Components and Entities are similar Components are virtual design entities entity OR_3 is
Reserved Words component OR_3 port (A,B,C: in bit; Z: out bit); end component ; Reserved Words Declarations of Components and Entities are similar Components are virtual design entities entity OR_3 is
Introduction to VHDL. Yvonne Avilés Colaboration: Irvin Ortiz Flores Rapid System Prototyping Laboratory (RASP) University of Puerto Rico at Mayaguez
Introduction to VHDL Yvonne Avilés Colaboration: Irvin Ortiz Flores Rapid System Prototyping Laboratory (RASP) University of Puerto Rico at Mayaguez What is VHDL? Very High Speed Integrated Circuit Hardware
Inthis lecture we will cover the following material:
Lecture #8 Inthis lecture we will cover the following material: The standard package, The std_logic_1164 Concordia Objects & data Types (Signals, Variables, Constants, Literals, Character) Types and Subtypes
Multi-valued Logic. Standard Logic IEEE 1164 Type std_ulogic is ( U, uninitialized
Multi-valued Logic Standard Logic IEEE 1164 Type std_ulogic is ( U, uninitialized X, unknown 0, logic 0 1, logic 1 Z, high impedance W, unknown L, logic 0 weak H, logic 1 weak - ); don t care Standard
5. VHDL - Introduction - 5. VHDL - Design flow - 5. VHDL - Entities and Architectures (1) - 5. VHDL - Entities and Architectures (2) -
Sistemas Digitais I LESI - 2º ano Lesson 5 - VHDL Prof. João Miguel Fernandes (miguel@di.uminho.pt) Dept. Informática - Introduction - VHDL was developed, in the mid-1980s, by DoD and IEEE. VHDL stands
UNIT I Introduction to VHDL VHDL: - V -VHSIC, H - Hardware, D - Description, L Language Fundamental section of a basic VHDL code Library :
UNIT I Introduction to VHDL VHDL stands for very high-speed integrated circuit hardware description language. Which is one of the programming languages used to model a digital system by dataflow, behavioral
Design units can NOT be split across different files
Skeleton of a Basic VHDL Program This slide set covers the components to a basic VHDL program, including lexical elements, program format, data types and operators A VHDL program consists of a collection
6.111 Lecture # 5. Entity section describes input and output. VHDL: Very High speed integrated circuit Description Language:
6.111 Lecture # 5 VHDL: Very High speed integrated circuit Description Language: All VHDL files have two sections: architecture and entity -- Massachusetts (Obsolete) Stoplight Example library ieee; use
Lecture 10 Subprograms & Overloading
CPE 487: Digital System Design Spring 2018 Lecture 10 Subprograms & Overloading Bryan Ackland Department of Electrical and Computer Engineering Stevens Institute of Technology Hoboken, NJ 07030 1 Subprograms
ECE 545 Lecture 5. Data Flow Modeling in VHDL. George Mason University
ECE 545 Lecture 5 Data Flow Modeling in VHDL George Mason University Required reading P. Chu, RTL Hardware Design using VHDL Chapter 4, Concurrent Signal Assignment Statements of VHDL 2 Types of VHDL Description
Review of Digital Design with VHDL
Review of Digital Design with VHDL Digital World Digital world is a world of 0 and 1 Each binary digit is called a bit Eight consecutive bits are called a byte Hexadecimal (base 16) representation for
VHDL: A Crash Course
VHDL: A Crash Course Dr. Manuel Jiménez With contributions by: Irvin Ortiz Flores Electrical and Computer Engineering Department University of Puerto Rico - Mayaguez Outline Background Program Structure
Advanced Training Course on FPGA Design and VHDL for Hardware Simulation and Synthesis. 26 October - 20 November, 2009
2065-15 Advanced Training Course on FPGA Design and VHDL for Hardware Simulation and Synthesis 26 October - 20 November, 2009 FPGA Architectures & VHDL Introduction to Synthesis Nizar Abdallah ACTEL Corp.2061
JUNE, JULY 2013 Fundamentals of HDL (10EC45) PART A
JUNE, JULY 2013 Fundamentals of HDL (10EC45) Time: 3hrs Max Marks:100 Note: Answer FIVE full questions, selecting at least TWO questions from each part. PART A Q1.a. Describe VHDL scalar data types with
CSCI Lab 3. VHDL Syntax. Due: Tuesday, week6 Submit to: \\fs2\csci250\lab-3\
![CSCI Lab 3. VHDL Syntax. Due: Tuesday, week6 Submit to: \\fs2\csci250\lab-3\](/thumbs/74/70459415.jpg "CSCI Lab 3. VHDL Syntax. Due: Tuesday, week6 Submit to: \\fs2\csci250\lab-3\")
CSCI 250 - Lab 3 VHDL Syntax Due: Tuesday, week6 Submit to: \\fs2\csci250\lab-3\ Objectives 1. Learn VHDL Valid Names 2. Learn the presentation of Assignment and Comments 3. Learn Modes, Types, Array,
Digital Design Using VHDL Using Xilinx s Tool for Synthesis and ModelSim for Verification
Digital Design Using VHDL Using Xilinx s Tool for Synthesis and ModelSim for Verification Ahmed Abu-Hajar, Ph.D. abuhajar@digitavid.net Digitavid, Inc San Jose, CA Session One Outline Introducing VHDL
310/ ICTP-INFN Advanced Tranining Course on FPGA and VHDL for Hardware Simulation and Synthesis 27 November - 22 December 2006
310/1780-10 ICTP-INFN Advanced Tranining Course on FPGA and VHDL for Hardware Simulation and Synthesis 27 November - 22 December 2006 VHDL & FPGA - Session 2 Nizar ABDALLH ACTEL Corp. 2061 Stierlin Court
EEL 4783: Hardware/Software Co-design with FPGAs
EEL 4783: Hardware/Software Co-design with FPGAs Lecture 9: Short Introduction to VHDL* Prof. Mingjie Lin * Beased on notes of Turfts lecture 1 What does HDL stand for? HDL is short for Hardware Description
VHDL 2 Combinational Logic Circuits. Reference: Roth/John Text: Chapter 2
VHDL 2 Combinational Logic Circuits Reference: Roth/John Text: Chapter 2 Combinational logic -- Behavior can be specified as concurrent signal assignments -- These model concurrent operation of hardware
Getting Started with Xilinx WebPack 13.1
Getting Started with Xilinx WebPack 13.1 B. Ackland June 2011 (Adapted from S. Tewksbury notes WebPack 7.1) This tutorial is designed to help you to become familiar with the operation of the WebPack software
1. Defining and capturing the design of a system. 2. Cost Limitations (low profit margin must sell millions)
What is an Embedded System? A type of computer system ECEN 4856: Embedded System Design Lecture 2: Embedded System Standards Traditional Definitions Limited in hardware and software vs the PC Designed
SECTION 1 FAMILIARIZATION WITH VHDL
SECTION 1 FAMILIARIZATION WITH VHDL Page Introduction 1.2 Overview of VHDL 1.7 VHDL design units 1.7 Description styles 1.10 Model organization 1.20 Packages 1.25 Signals and delays 1.28 Attributes 1.29
VHDL. ELEC 418 Advanced Digital Systems Dr. Ron Hayne. Images Courtesy of Cengage Learning
VHDL ELEC 418 Advanced Digital Systems Dr. Ron Hayne Images Courtesy of Cengage Learning Design Flow 418_02 2 VHDL Modules 418_02 3 VHDL Libraries library IEEE; use IEEE.std_logic_1164.all; std_logic Single-bit
Modeling Complex Behavior
Modeling Complex Behavior Sudhakar Yalamanchili, Georgia Institute of Technology, 2006 (1) Outline Abstraction and the Process Statement Concurrent processes and CSAs Process event behavior and signals
Programmable Logic Design Grzegorz Budzyń Lecture. 4: Introduction to VHDL
Programmable Logic Design Grzegorz Budzyń Lecture 4: Introduction to VHDL Plan History Main features Building blocks: Entity Architecture body Package Configuration declaration History Some history The
Mridula Allani Fall Fall
Mridula Allani Fall 2010 Fall 2010 1 Model and document digital systems Hierarchical models System, RTL (Register Transfer Level), gates Different levels of abstraction Behavior, structure Verify circuit/system
Islamic University Gaza Engineering Faculty Department of Computer Engineering ECOM 4111: Digital Systems Design Lab. Lab # 5. Concurrent Statements
Islamic University Gaza Engineering Faculty Department of Computer Engineering ECOM 4111: Digital Systems Design Lab Lab # 5 Concurrent Statements October, 2015 Introduction VHDL code is inherently concurrent
Digital Design Laboratory Lecture 2
ECE 280 / CSE 280 Digital Design Laboratory Lecture 2 Adder Design Basic building block is a full adder Chained together as a ripple carry adder Carry lookahead adder is an other option Propagate and generate
Hardware Modeling. VHDL Basics. ECS Group, TU Wien
Hardware Modeling VHDL Basics ECS Group, TU Wien VHDL Basics 2 Parts of a Design Unit Entity Architecture Configuration Package Package Package Body Library How to create a Design Unit? Interface to environment
Assignment. Last time. Last time. ECE 4514 Digital Design II. Back to the big picture. Back to the big picture
Assignment Last time Project 4: Using synthesis tools Synplify Pro and Webpack Due 11/11 ning of class Generics Used to parameterize models E.g., Delay, bit width Configurations Configuration specification
ECE 448 Lecture 3. Combinational-Circuit Building Blocks. Data Flow Modeling of Combinational Logic
ECE 448 Lecture 3 Combinational-Circuit Building Blocks Data Flow Modeling of Combinational Logic George Mason University Reading Required P. Chu, FPGA Prototyping by VHDL Examples Chapter 3, RT-level
ECE 448 Lecture 3. Combinational-Circuit Building Blocks. Data Flow Modeling of Combinational Logic
ECE 448 Lecture 3 Combinational-Circuit Building Blocks Data Flow Modeling of Combinational Logic George Mason University Reading Required P. Chu, FPGA Prototyping by VHDL Examples Chapter 3, RT-level
ECE 545 Lecture 8. Data Flow Description of Combinational-Circuit Building Blocks. George Mason University
ECE 545 Lecture 8 Data Flow Description of Combinational-Circuit Building Blocks George Mason University Required reading P. Chu, RTL Hardware Design using VHDL Chapter 7, Combinational Circuit Design:
EE261: Intro to Digital Design
2014 EE261: Intro to Digital Design Project 3: Four Bit Full Adder Abstract: This report serves to teach us, the students, about modeling logic and gives a chance to apply concepts from the course to a
ECE4401 / CSE3350 ECE280 / CSE280 Digital Design Laboratory
ECE4401 / CSE3350 ECE280 / CSE280 Digital Design Laboratory Instructor John Chandy Office: ITEB 437 Office Hours: W10-12 Tel: (860) 486-5047 Email: john.chandy@uconn chandy@uconn.edu Class home page: HuskyCT
Sudhakar Yalamanchili, Georgia Institute of Technology, 2006
Modeling Structure Sudhakar Yalamanchili, Georgia Institute of Technology, 2006 (1) Elements of Structural Models microphone To processor Micro 3284 headphones speakers amplifier Structural models describe
The process. Sensitivity lists
The process process itself is a concurrent statement but the code inside the process is executed sequentially Process label (optional) Process declarative region Process body entity Test is, : in bit;
ENGIN 241 Digital Systems with Lab
ENGIN 241 Digital Systems with Lab (4) Dr. Honggang Zhang Engineering Department University of Massachusetts Boston 1 Introduction Hardware description language (HDL): Specifies logic function only Computer-aided
INTRODUCTION TO VHDL. Lecture 5 & 6 Dr. Tayab Din Memon Assistant Professor Department of Electronic Engineering, MUET
INTRODUCTION TO VHDL Lecture 5 & 6 Dr. Tayab Din Memon Assistant Professor Department of Electronic Engineering, MUET VHDL Resources Other Sources manufacturers web pages http://www.xilinx.com http://www.altera.com
VHDL for Complex Designs
ELEC 379 : DESIGN OF DIGITAL AND MICROCOMPUTER SYSTEMS 1998/99 WINTER SESSION, TERM 2 VHDL for Complex Designs This lecture covers VHDL features that are useful when designing complex logic circuits. After
fa0 fa1 fa2 a(0) a(1) a(2) a(3) cin a b sum(0) sum(1) sum(2) sum(3) sum cout cin cin cout a b sum cout cin a b sum cout cin b(0) b(1) b(2) b(3)
Introduction to Synopsys and VHDL on Solaris c Naveen Michaud-Agrawal for Dr. Pakzad's CSE 331 Honor class September 25, 2000 1 Introduction VHDL is an acronym which stands for VHSIC Hardware Description
Two HDLs used today VHDL. Why VHDL? Introduction to Structured VLSI Design
Two HDLs used today Introduction to Structured VLSI Design VHDL I VHDL and Verilog Syntax and ``appearance'' of the two languages are very different Capabilities and scopes are quite similar Both are industrial
Hardware Modeling. VHDL Architectures. Vienna University of Technology Department of Computer Engineering ECS Group
Hardware Modeling VHDL Architectures Vienna University of Technology Department of Computer Engineering ECS Group Contents Structural Modeling Instantiation of Components Behavioral Modeling Processes
Introduction to VHDL #1
ECE 3220 Digital Design with VHDL Introduction to VHDL #1 Lecture 3 Introduction to VHDL The two Hardware Description Languages that are most often used in industry are: n VHDL n Verilog you will learn
Lab # 5. Subprograms. Introduction
Lab # 5 Subprograms Introduction Subprograms consist of procedures and functions. A procedure can return more than one argument; a function always returns just one. In a function, all parameters are input
Hardware Description Languages. Modeling Complex Systems
Hardware Description Languages Modeling Complex Systems 1 Outline (Raising the Abstraction Level) The Process Statement if-then, if-then-else, if-then-elsif, case, while, for Sensitivity list Signals vs.
IEEE LANGUAGE REFERENCE MANUAL Std P1076a /D3. The rules applicable to the various forms of name are described in this section clause 1.
LANGUAGE REFERENCE MANUAL Std P1076a-1999 2000/D3 Clause 6 Names The rules applicable to the various forms of name are described in this section clause 1. 6.1 Names Names can denote declared entities,
ELCT 501: Digital System Design
ELCT 501: Digital System Lecture 4: CAD tools (Continued) Dr. Mohamed Abd El Ghany, Basic VHDL Concept Via an Example Problem: write VHDL code for 1-bit adder 4-bit adder 2 1-bit adder Inputs: A (1 bit)
CCE 3202 Advanced Digital System Design
CCE 3202 Advanced Digital System Design Lab Exercise #2 This lab exercise will show you how to create, synthesize, and test a 3-bit ripple counter. A ripple counter is simply a circuit that outputs the
A Brief Introduction to Verilog Hardware Definition Language (HDL)
www.realdigital.org A Brief Introduction to Verilog Hardware Definition Language (HDL) Forward Verilog is a Hardware Description language (HDL) that is used to define the structure and/or behavior of digital
LECTURE 4: The VHDL N-bit Adder
EECS 317 Computer Design LECTURE 4: The VHDL N-bit Adder Instructor: Francis G. Wolff wolff@eecs.cwru.edu Case Western Reserve University Review: N-Bit Ripple-Carry Adder Hierarchical design: 2-bit adder
C. Sisterna UNSJ Argentina. PACKAGE and SUBPROGRAMS
C. Sisterna UNSJ Argentina PACKAGE and SUBPROGRAMS Package Syntax 2 package is [subprograma_declarations]; [constant_declarations]; [type_declarations]; [component_declarations]; [attribute_declarations];
VHDL Sample Slides Rev Sample Slides from the 2-day and 4-day VHDL Training Courses
VHDL Sample Slides from the 2-day and 4-day VHDL Training Courses Rev. 4.7 VHDL 2011 TM Associates, Inc. 1-1 These sample slides are taken from the 4-day basic VHDL training course. They are from a variety
VHDL Examples Mohamed Zaky
VHDL Examples By Mohamed Zaky (mz_rasmy@yahoo.co.uk) 1 Half Adder The Half Adder simply adds 2 input bits, to produce a sum & carry output. Here we want to add A + B to produce Sum (S) and carry (C). A
VHDL. Official Definition: VHSIC Hardware Description Language VHISC Very High Speed Integrated Circuit
VHDL VHDL Official Definition: VHSIC Hardware Description Language VHISC Very High Speed Integrated Circuit VHDL Alternative (Student Generated) Definition Very Hard Digital Logic language VHDL Design
Basic Language Elements
Basic Language Elements Identifiers A basic identifier: May only contain alphabetic letters (A to Z and a to z), decimal digits (0 to 9) and the underline character (_) Must start with an alphabetic letter
VHDL. VHDL History. Why VHDL? Introduction to Structured VLSI Design. Very High Speed Integrated Circuit (VHSIC) Hardware Description Language
VHDL Introduction to Structured VLSI Design VHDL I Very High Speed Integrated Circuit (VHSIC) Hardware Description Language Joachim Rodrigues A Technology Independent, Standard Hardware description Language
Packages and Aliases. Prof. K. J. Hintz. Department of Electrical and Computer Engineering George Mason University
Packages and Aliases Prof. K. J. Hintz Department of Electrical and Computer Engineering George Mason University 1 Packages Method for Grouping Related Declarations Which Serve a Common Purpose Set of
Introduction to Verilog
Introduction to Verilog COE 202 Digital Logic Design Dr. Muhamed Mudawar King Fahd University of Petroleum and Minerals Presentation Outline Hardware Description Language Logic Simulation versus Synthesis
Computer-Aided Digital System Design VHDL
بس م اهلل الر حم ن الر حی م Iran University of Science and Technology Department of Computer Engineering Computer-Aided Digital System Design VHDL Ramin Rajaei ramin_rajaei@ee.sharif.edu Modeling Styles
Getting Started with VHDL
Getting Started with VHDL VHDL code is composed of a number of entities Entities describe the interface of the component Entities can be primitive objects or complex objects Architectures are associated
A bird s eye view on VHDL!
Advanced Topics on Heterogeneous System Architectures A bird s eye view on VHDL Politecnico di Milano Conference Room, Bld 20 19 November, 2015 Antonio R. Miele Marco D. Santambrogio Politecnico di Milano
Writing VHDL for RTL Synthesis
Writing VHDL for RTL Synthesis Stephen A. Edwards, Columbia University December 21, 2009 The name VHDL is representative of the language itself: it is a two-level acronym that stands for VHSIC Hardware
ECE 3401 Lecture 10. More on VHDL
ECE 3401 Lecture 10 More on VHDL Outline More on VHDL Some VHDL Basics Data Types Operators Delay Models VHDL for Simulation VHDL for Synthesis 1 Data Types Every signal has a type, type specifies possible
IE1204 Digital Design L7: Combinational circuits, Introduction to VHDL
IE24 Digital Design L7: Combinational circuits, Introduction to VHDL Elena Dubrova KTH / ICT / ES dubrova@kth.se This lecture BV 38-339, 6-65, 28-29,34-365 IE24 Digital Design, HT 24 2 The multiplexer