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DSY1501/101/1/Tutorial Letter 101/1/Digital Systems 1DSY 1501Semesters 1 and 2Electrical and Mining EngineeringThis tutorial letter contains important information about your module.BARCODECONTENTS DSY1501/ 1 INTRODUCTION Page 1 Getting started 2 PURPOSE AND OUTCOMES 2 Purpose 2 Outcomes 2 Graduate a...

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DSY1501/101/1/2021

Tutorial Letter 101/1/2021 Digital Systems 1

DSY1501 Semesters 1 and 2 Electrical and Mining Engineering

This tutorial letter contains important information about your module.

BARCODE

DSY1501/101

CONTENTS Page 1 1.1

INTRODUCTION .......................................................................................................................... 3 Getting started .............................................................................................................................. 3

2 2.1 2.2 2.3

PURPOSE AND OUTCOMES ...................................................................................................... 3 Purpose ........................................................................................................................................ 3 Outcomes ..................................................................................................................................... 4 Graduate attributes ....................................................................................................................... 4

3 3.1 3.2 3.3 4 4.1 4.2 4.3 4.4 4.5 5

LECTURER(S) AND CONTACT DETAILS................................................................................... 6 Lecturer(s) .................................................................................................................................... 6 Department ................................................................................................................................... 6 University ...................................................................................................................................... 6 RESOURCES ............................................................................................................................... 7 Joining myUnisa ........................................................................................................................... 7 Prescribed book(s) ........................................................................................................................ 7 Recommended book(s)................................................................................................................. 7 Electronic reserves (e-reserves) ................................................................................................... 8 Library services and resources ..................................................................................................... 8 STUDENT SUPPORT SERVICES ................................................................................................ 8

6 6.1 6.2

HOW TO STUDY ONLINE............................................................................................................ 8 What does it mean to study fully online? ....................................................................................... 8 myUnisa tools ............................................................................................................................... 9

7 7.1 7.3 7.3.1 7.3.2 7.4 7.5 7.6. 7.7.

ASSESSMENT ........................................................................................................................... 10 Assessment plan ........................................................................................................................10 General assignment numbers ..................................................................................................... 13 Unique assignment numbers ...................................................................................................... 13 Due dates for assignments ......................................................................................................... 13 Submission of assignments ........................................................................................................ 14 The assignments ........................................................................................................................15 Other assessment methods ........................................................................................................ 38 The examination ......................................................................................................................... 38

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FREQUENTLY ASKED QUESTIONS ........................................................................................ 38 SOURCES CONSULTED ........................................................................................................... 38

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IN CLOSING ............................................................................................................................... 38 ADDENDUM ............................................................................................................................... 38

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DSY1501/101 Dear Student

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INTRODUCTION Dear Student Welcome to the subject Digital Systems I (Theory) (DSY1501) at UNISA. This tutorial letter serves as a guideline to this course. It provides you with general administrative information as well as specific information about the subject. Read it carefully and keep it safe for future reference. We trust that you will enjoy this course. Because this is a fully online module, you will need to use myUnisa to study and complete the learning activities for this module. Visit the website for DSY1501 on myUnisa frequently. The website for your module is https://mymodules.unisa.ac.za/portal/site/DSY1501-21-Y1. 1.1

Getting started

Owing to the nature of this module, you can read about the module and find your study material online. Go to the website at https://my.unisa.ac.za and log in using your student number and password. Click on "myModules" at the top of the web page and then on "Sites" in the top right corner. In the new window, click on the grey Star icon next to the modules you want displayed on your navigation bar. Close the window in the top right corner. Then select the option "Reload to see your updated favourite sites". Now go to your navigation bar and click on the module you want to open. We wish you every success with your studies!

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PURPOSE AND OUTCOMES 2.1

Purpose

This is the first course in digital systems. The course therefore requires no pre-knowledge of digital systems. It simply assumes that you can think logically and analytically. The purpose of this module is to enable students to understand the basic concepts of digital systems. Students who successfully complete this module will be able to firstly, explain the differences between digital and analog quantities, to represent digital quantities, to describe various parameters of digital pulses and waveforms, to understand the concepts of basic logic functions (NOT, AND, OR) and to describe the several types of logic operations and explain their applications in an example system. Secondly, the students should be able to understand the concepts of binary number systems and its associated basic arithmetic operations (addition, subtraction, multiplication and division), to express signed binary numbers in sign-magnitude, 1’s complement, 2’s complement and floating-point formats, to carry out arithmetic operations with signed binary numbers, to convert from binary numbers to other number systems namely the hexadecimal, the octal, the decimal and the binary coded decimal (BCD) number systems, to perform addition in BCD number systems. Thirdly, students should understand the concepts of logic gates and they are corresponding Integrated Circuits (ICs). Fourthly, students should understand the laws and theorems of Boolean algebra, logic simplification of Boolean expressions (SOP & POS), truth tables, Karnaugh maps and code converters. Finally, the students should apply the knowledge of logic gates and Boolean algebra to creating functions of combinational logic in designing basic adders, parallel adders, comparators, decoders, encoders, multiplexers and demultiplexers.

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DSY1501/101 2.2

Outcomes

For this module, you will have to master several outcomes: • Specific outcome 1: Understand the concepts of digital signals and systems, explain the differences between digital and analog quantities, represent digital quantities (pulses and waveforms) and understand the basic logic gates (AND, OR, NOT) and how they can be applied in a digital system. •

Specific outcome 2: Demonstrate thorough knowledge of the different number systems (binary, decimal, hexadecimal, octal, Binary Coded Decimal (BCD)), operations and codes, and conversion between them.

•

Specific outcome 3: Understand and apply logic gates in logic circuits. Analyse and build combinational logic circuits from basic and derived logic gates (XOR, NOR, NAND, XNOR).

•

Specific outcome 4: Understand the laws and theorems of Boolean algebra, logic simplification of Boolean expressions (Sum of Products: SOP & Product Of Sum: POS). Simplify Boolean expressions using truth tables, Karnaugh maps and code converters.

•

Specific outcome 5: Analyse basic combinational logic circuits, such as AND-OR, AND-ORNOT, XOR, XNOR. Use the basic combinational logic circuits to implement SOP and POS expressions.

•

Specific outcome 6: Apply the knowledge of logic gates and Boolean algebra to creating functions of combinational logic in designing basic adders, parallel adders, comparators, decoders, encoders, multiplexers and demultiplexers.

•

Specific outcome 7: To use AND-OR-INVERT (AOI) Integrated Circuits (ICs) to implement SOP expressions.

2.3

Graduate attributes

This module will cover one graduate attribute, the graduate attribute 4. Graduate Attribute 4 (GA 4): Investigations, experiments and data analysis: Conduct investigations of well-defined problems through locating and searching relevant codes and catalogues, conducting standard tests, experiments and measurements. Range Statement: The balance of investigation should be appropriate to the discipline. An investigation should be typical of those in which the graduate would participate in an employment situation shortly after graduation. Note: An investigation differs from a design in that the objective is to produce knowledge and understanding of a phenomenon. In order to achieve this GA the student has to conduct investigations of well-defined electrical engineering problems through locating, searching and selecting relevant data from codes, data bases and conducting standard tests, experiments and measurements to provide valid conclusions. 2

DSY1501/101

The investigations and experiments should be appropriate to electrical engineering. An investigation or experimental study should be typical of those in which the student would participate in an employment situation shortly after graduation.

An investigation differs from a design in that the objective is to produce knowledge and understanding of a phenomenon. Both scientists and engineers contribute to the world of human knowledge, but in different ways. Scientists use the scientific method to make testable explanations and predictions about the world. A scientist asks a question and develops an experiment, or set of experiments, to answer that question. Engineers use the engineering design process to create solutions to problems.

The flow diagram for the Scientific Method, applicable to this GA is shown below.

Figure 1: GA4 Process

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DSY1501/101 Competence in this Graduate Attribute 4 is demonstrated when: a. The scope of the investigation is defined. b. Investigations are planned and conducted within an appropriate discipline. c. Available literature is searched, and material is evaluated for suitability to the investigation. d. Relevant equipment or software is selected and appropriately used for the investigation. e. Data obtained is analysed and interpreted. f. Conclusions are drawn from an analysis of all available evidence. g. The purpose, process and outcomes of the investigation are recorded in a technical report.

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LECTURER(S) AND CONTACT DETAILS 3.1

Lecturer(s)

You can contact Ms MI Masopoga for any theoretical questions at the following contact details: [email protected] Telephone number: 011-471 0227 E-mail : [email protected] Contact Times: Monday to Thursday 09h00 – 13h00 3.2 Department Department of Electrical and Mining Engineering:

[email protected]

You can contact the Department of Electrical and Mining engineering as follows: Telephone number: (011)-471-2854 E-mail: [email protected] Please note: You should use your UNISA mylife email account to communicate with us. We may not be able to communicate with you through a private email address. 3.3

University

If you need to contact the University about matters not related to the content of this module, please consult the publication My studies @ Unisa that you received with your study material. This brochure contains information on how to contact the University (e.g. to whom you can write for different queries, important telephone and fax numbers, addresses and details of the times certain facilities are open). Always have your student number at hand when you contact the University.

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DSY1501/101

4

RESOURCES 4.1

Joining myUnisa

The myUnisa learning management system is the University's online campus which will help you communicate with your lecturers, other students and the administrative departments within Unisa. To claim your myUnisa account, please follow the steps below: 1. Visit the myUnisa website at https://my.unisa.ac.za/portal 2. Click on the "Claim Unisa login" link on the top of the screen under the orange user ID box. 3. A new screen will load, prompting you to enter your student number. Please enter your student number and click "continue". 4. Enter your surname, your full name, your date of birth and, finally, your South African ID number (for South African citizens) OR your passport number (for foreign students). Then click "continue". Remember to enter either an ID number or a passport number, NOT both. 5. Please read through the guidelines and click all the check boxes to acknowledge that you have read all the information provided. Once you are done, click the "Acknowledge" button to redirect you to the final page in the process. 6. The final page will display your myLife e-mail address, and your myLife AND myUnisa password. This password will also be sent to the cellphone number displayed on the page for safekeeping. 7. Please note that it can take up to 24 hours for your myLife e-mail account to be created.

Remember, the password provided is your myUnisa AND myLife password. 4.2

Prescribed book(s)

The prescribed textbook for this module is: 1. Thomas L. Floyd, “Digital Fundamentals, Global Edition”, 11th edition, Pearson (intl), ISBN: 9781292075983, 1292075988; eISBN: 9781292075990, 1292075996. Also, remember to check MyUnisa under additional Resources for important information.

4.3

Recommended book(s)

1. John Crowe and Barrie Hayes-Gill, “Introduction to Digital Electronics”. Recommended books can be requested online, via the Library catalogue.

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DSY1501/101 4.4

Electronic reserves (e-reserves)

There are no electronic reserves for this module. E-reserves can be downloaded from the Library catalogue. More information is available at: https://libguides.unisa.ac.za/request/request 4.5

Library services and resources

The Unisa Library offers a range of information services and resources: • •

for detailed Library information go to http://www.unisa.ac.za/sites/corporate/default/Library for research support and services (e.g. personal librarians and literature search services) go to http://www.unisa.ac.za/sites/corporate/default/Library/Libraryservices/Research-support

The Library has created numerous Library guides: http://libguides.unisa.ac.za Recommended guides: • • • • •

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request and download recommended material: http://libguides.unisa.ac.za/request/request postgraduate information services: http://libguides.unisa.ac.za/request/postgrad finding and using library resources and tools: http://libguides.unisa.ac.za/Research_skills Frequently asked questions about the Library: http://libguides.unisa.ac.za/ask Services to students living with disabilities: http://libguides.unisa.ac.za/disability

STUDENT SUPPORT SERVICES

The Study @ Unisa website is available on myUnisa: www.unisa.ac.za/brochures/studies This website has all the tips and information you need to succeed at Unisa.

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HOW TO STUDY ONLINE

6.1

What does it mean to study fully online?

Studying fully online modules differs completely from studying some of your other modules at Unisa. •

All your study material and learning activities for online modules are designed to be delivered online on myUnisa.

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DSY1501/101 All your assignments must be submitted online. This means that you do all your activities and submit all your assignments on myUnisa. In other words, you may NOT post your assignments to Unisa using the South African Post Office.

•

All communication between you and the University happens online. Lecturers will communicate with you via e-mail and SMS, and use the Announcements, the Discussion Forums and the Questions and Answers tools. You can also use all of these platforms to ask questions and contact your lecturers.

6.2

myUnisa tools

The main tool that we will use is the Lessons tool. This tool will provide the content of and the assessments for your module. At times you will be directed to join discussions with fellow students and complete activities and assessments before you can continue with the module. It is very important that you log in to myUnisa regularly. We recommend that you log in at least once a week to do the following: •

Check for new announcements. You can also set your myLife e-mail account so that you receive the announcement e-mails on your cellphone.

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Do the Discussion Forum activities. When you do the activities for each learning unit, we want you to share your answers with the other students in your group. You can read the instructions and even prepare your answers offline, but you will need to go online to post your messages.

•

Do other online activities. For some of the learning unit activities you might need to post something on the Blog tool, take a quiz or complete a survey under the Self-Assessment tool. Do not skip these activities because they will help you complete the assignments and the activities for the module.

We hope that by giving you extra ways to study the material and practise all of the activities, you will succeed in the online module. To get the most out of the online module you MUST go online regularly to complete the activities and assignments on time.

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DSY1501/101

7 ASSESSMENT 7.1

Assessment plan

This is subject is assessed in continuous evaluation mode. This means there is no examination, and the final mark is simply a combination of the assessments and associated weights, as described in table 1.

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Assessment type

Assignment (AS)

Online Assignments

10 %

Mi...