... on 3B2 by Asco Typesetters, Hong Kong and was printed and
bound in the United States of America.
Library of Congress Cataloging-in-Publication Data
Pedroni, Volnei A.
Circuit designwith VHDL/ Volnei ... Altera Quartus II Tutorial 343
Appendix E: VHDL Reserved Words 355
Bibliography 357
Index 359
x Contents
TLFeBOOK
with VHDL
Volnei A. Pedroni
Circuit Design
TLFeBOOK
To Claudia, Patricia, Bruno, ... expected.
1.5 Design Examples
As mentioned in the preface, the book is indeed a design- oriented approach to the
task of teaching VHDL. The integration between VHDL and Digital Design is
achieved...
... THEN
d
clk
rst
q
DFF
Figure 2.5
DFF with asynchronous reset.
18 Chapter 2
TLFeBOOK
with VHDL
Volnei A. Pedroni
Circuit Design
Circuit Designwith VHDL
Volnei A. Pedroni
This textbook teaches VHDL using system ... _________ ;
26
Code Structure 23
TLFeBOOK
CircuitDesignwith VHDL
Volnei A. Pedroni
MIT Press
Cambridge, Massachusetts
London, England
TLFeBOOK
Example 2.1: DFF with Asynchronous Reset
Figure 2.5 ... system examples com-
bined with programmable logic and supported by laboratory
exercises. While other textbooks concentrate only on lan-
guage features,
Circuit Designwith VHDL
offers a fully inte-
grated...
... Chapter 3
TLFeBOOK
with VHDL
Volnei A. Pedroni
Circuit Design
TLFeBOOK
1Introduction
1.1 About VHDL
VHDL is a hardware description language.Itdescribes the behavior of an electronic
circuit or system, ... on 3B2 by Asco Typesetters, Hong Kong and was printed and
bound in the United States of America.
Library of Congress Cataloging-in-Publication Data
Pedroni, Volnei A.
Circuit designwith VHDL/ Volnei ... A. Pedroni.
p. cm.
Includes bibliographical references and index.
ISBN 0-262-16224-5 (alk. paper)
1. VHDL (Computer hardware description language) 2. Electronic circuit design.
3. System design. ...
... 1
0
1
10
1
0
10
01
00
11
10
A
BC
C
B
A
F
A
F = AB' + BC + AC
(c) Network with hazard removed
C
E
B
A
D
F
0 1
0
1
10
1
0
10
01
00
11
10
A
BC
F = AB' + BC
1 - Hazard
(a) Network with 1-hazard
B
D
E
F
0 ns 10 ns 20 ns 30 ... inversion
Figure 1-7 Conversion to NOR Gates
(a) AND-OR network
(b) Equivalent NOR-gate network
8
VHDL Processes
General form of Process
process(sensitivity-list)
begin
sequential-statements
end ... '1');
initialize QN to '1' since bit signals are initialized to '0' by default
end DFF;
architecture SIMPLE of DFF is
begin
process (CLK) process is executed when...
... primitives
B – Examples
Combinational Circuit
Sequential Circuit
3
User-Defined Primitives
ã The set of predefined gate primitives by designing and
specifying new primitive elements ...
actual circuit and the model.
- There is no continuous assignment equivalent to the
bidirectional transfer gate.
Sequential Circuit
A feedback path
The state of the sequential circuits ... minimum delay value that the designer expects the gate to have
typ The typical delay value that the designer expects the gate to have
max The maximum delay value that the designer expects the gate...
... For complex design: number of gates is very large
-> need a more effective way to describe circuit
Dataflow model: Level of abstraction is higher than gate-
level, describe the design using ... describe the design using expressions instead of
primitive gates
Circuit is designed in terms of dataflow between register,
how a design processes data rather than instantiation of
individual ... = a^b^cin;
assign cout = (a & b) | (cin & (a^b));
endmodule
ã Lets design 8-bit adder
20
Sequential circuit
4-bit ripple carry counter
22
Expression: Operands
Constant number...
...
Combinational circuit
Sequential circuit
Transistor level design
Gate level design
Register-transfer level design
Behavioral level design
Logic symbol
VHDL
Synthesis ... Microprocessor DesignwithVHDL Chapter 2 - Digital Circuits
43
the focus is on the design of the digital circuitry of the microprocessor, the memory, and other supporting digital
logic circuits. ... Microprocessor DesignwithVHDL Chapter 2 - Digital Circuits
39
to describe digital circuits are given in the following sections. Another method to formally describe the operation of
a circuit is by using...
... Hexadecimal Systems
2-10 Digital Circuit Analysis and Designwith an Introduction to CPLDs and FPGAs
Orchard Publications
Solution:
Replacing all ones with zeros and all zeros with ones we find that the ... Systems and Conversions
1-6 Digital Circuit Analysis and Designwith an Introduction to CPLDs and FPGAs
Orchard Publications
and by repeated multiplication by 8 for the fractional part.
Example ... introduction to sequential logic circuits. It begins with a
Chapter 2 Operations in Binary, Octal, and Hexadecimal Systems
2-18 Digital Circuit Analysis and Designwith an Introduction to CPLDs...
... interactive, designed to be done in class
with other students. Some of the activities can be assigned as homework, but that is not the main
intention of this book.
Fun with Grammar has been designed ... form a
new group. This can be accomplished by having students get into groups by number.
When you are ready to split them up again, have them reform by suit.
4. Paper draw. This is a quick way ... activities in Fun with Grammar are still easy to
use. If you are teaching a low-level class, choose activities designated “red.” If you are teaching a
higher-level class, remember that “black” designates...