Massachusetts Institute of Technology
Department of Electrical Engineering and Computer Science

6.111 - Introductory Digital Systems Laboratory

General Information

In-Charge and Lecturer
Prof. Donald E. Troxel, Room 36-287, 3-2570, troxel@mit.edu

Secretary Francis Doughty, Room 36-277, 8-6484, doughty@mit.edu

Teaching Staff This term's teaching staff is listed on the 6.111 webpage.

Required Texts

One of the following books on VHDL, (or equivalent):
$\bullet$ VHDL for Programmable Logic, by Kevin Skahill, (Addison-Wesley)
(0-201-89573-0) Quantum Price $72.00
$\bullet$ VHDL Made Easy by David Pellerin and Douglas Taylor, (Prentice Hall)
(0-13-650763-8) Quantum Price $72.00

Recommended Reading Purchase is NOT required.

Douglas E. Ott and Thomas J. Wilderotter, A Designer's Guide to VHDL Synthesis, (Kluwer Academic Publishers) (0-7923-9472-0) Quantum Price $120.15

Fletcher, W.I., An Engineering Approach to Digital Design, Prentice-Hall, Inc., NJ, 1980 - Quantum Price $59.40

Mano, M. Morris Computer Engineering: Hardware Design Prentice-Hall, Inc., NJ, 1988 - Quantum Price $91.80

MIT-discount prices from Quantum Books are listed here. (Quantum Books - 4 Cambridge Center, Kendall Square, Phone: (617) 494-5042, www.quantumbooks.com). NOTE: MIT students, faculty, and staff who identify themselves as such receive a 5-30% discount off of most books, depending on the publisher.

6.111 Homepage http://web.mit.edu/6.111/www/s2002

TTL Pinouts/Data

The TTL data book is no longer available. Required data and pinouts will be handed out, available on the web page, and available in the laboratory.

Drawing Template
All logic diagrams submitted in this subject must be drawn with a template or on a computer, except for quizzes, where all that is required is that logic diagrams be legible. For homework and lab preparation, you may use a drawing template, though it is likely that you will use a computer-based drawing package. Preferred templates: MIL-STD-806C, in 1/2, 3/8 or 3/4 size, Koh-I-Noor No. 830544 or equivalent in Rapid Design or Pickett. (Templates are available at University Stationery (311 Massachusetts Ave.) and perhaps at the COOP (at Kendall Square).)

Conduct of the Subject (minor changes may be made):

Classes
At the beginning of the term, there are three lectures and one recitation meeting per week. After the second quiz, the lectures and recitations are discontinued. We will meet you frequently in the laboratory. We will meet in the lecture hall (34-101) for project presentations (by you) after the block diagram conferences. Notification of particulars of the project presentations will be sent by email to 6.111students@mit.edu.

Problem Sets
Five sets will be issued and your solutions will be graded; these are based on the lectures, text, and labs.

Laboratory Assignments
All laboratory exercises must be completed; these are intended to prepare you for the term project. In doing these exercises, each student works individually.

Term Project
The most important assignment is the Term Project, about which you will receive more detailed instruction later. In doing this assignment, you will work with one or, at most, two partners. You should begin finding your partner(s) early in the term.

Quizzes
There will be two quizzes during the term, both before Drop Date.

Grading Policy
Late work will be penalized. Normally, homework will not be accepted after solutions have been distributed. Lateness of the lab assignments will result in a 20% per day penalty for work completed 1-5 working days after the due date. No point credit will be given for unexcused lateness exceeding 5 days.

The Lab 1 Checkoff sheet is to be initialed by a TA or LA and included with your report. Note that the checkoff sheet is NOT the report.

Labs 2 and 3 have intermediate due dates, such as checkoff, etc. Lateness on these intermediate due dates does NOT result in automatic extensions for later due dates, e.g. the report due date. For example, two days late on Lab 3 checkoff will result in a penalty of 40% for points assigned to the checkoff. The report is (still) due at the published due date. There is virtually no modification required to a report depending on the working of your lab implementation. However, reports with no lab effort will receive a zero.

The term project requirements must be completed in accordance with the schedule given in the instructions. You must make a presentation of your part of your project to the rest of the class after the logic diagram conference. You must demonstrate (i.e., present) your term project even if it does not fully function, and you must submit the written report in order to receive a passing grade.

The assignment of letter grades (A,B,C,D,F) is an inherently subjective process. We do, however, make use of numerical data. A single number is computed by weighting graded assignments. The formula used may change slightly from term to term.

The following weights are currently used:

		 Problem Sets 		 10%
		 Labs 		 35%
		 Quizzes 		 20%
		 Final Project 		 35%

We construct a histogram of these summary numbers and proceed to discuss individual performances of virtually all students. Some of the factors considered are:

1.

Diligence as measured by completion of most of the problem sets and by presence in the laboratory during final project time.

2.

Completion of Labs 2 and 3. Past history has been that it is extremely rare for a student to receive an A without completing Lab 3. Of course, it is possible to get a grade lower than an A even if Lab 3 is done.

3.

Project performance.

(a)

Any student who does not turn in a final project report will receive an F.

(b)

Students who do not construct a project will receive an F.

(c)

Project complexity is an important factor in discriminating between an A and a B. An A is rarely given if the final project is not as complicated as the last Lab.

Although 6.111 has a significant classroom component, it is primarily a lab subject. Accomplishments in the lab tend to be weighted more heavily than other components. The classroom component is viewed as supportive of the lab components.

Traditionally, both average grade levels and average performance have been quite high in 6.111. A large number of students do ``A" level work and are, indeed, rewarded with a grade of A. The corollary to this is that, since average performance levels are so high, punting any part of the subject, even the problem sets, can lead to a disappointing grade. It is important that you keep up with the work.

Finally, and unfortunately, it is important for us to outline our expectations for academic honesty in 6.111. We do this not because we expect any of you to be dishonest, nor to insult your intelligence or character, but to avoid any misunderstandings.

First, the quizzes are to be individual efforts. The problem sets and lab exercises are also to be individual efforts; however, it is okay to ask questions, get help from us, fellow students, or anyone else. But then, do them by yourself. Indications of collaboration such as incidents of identical code or copied figures are unacceptable and are liable to be dealt with in a seemingly harsh fashion. Do not ``dry lab" the design part of the laboratory work. The TA's will be asking you about your solutions to make sure you really do understand what you have done.

The Final Project is a different story. We do expect you to collaborate, with the course staff and with your fellow students, especially with your lab partner. Joint or individual reports are acceptable, but in the case of joint reports it is important that responsibility for each section of the work be indicated.

Laboratory
The laboratory facilities are located on the sixth floor of Building 38. Read the General Laboratory Information handout.

Schedule
The schedule of the lectures and assignments is posted on the course website. Staying on schedule is very important in this subject, in order to be prepared to do the term project, which is the single most important assignment in 6.111. It will be an enjoyable experience if you are properly prepared.

Extra Units for 6.111
Many 6.111 students spend more hours per week than warranted by the 12 unit rating. Primarily this is due to large final projects. It is now possible to register for 6.905 and gain an additional 6 units of credit for 6.111. Your grade for 6.905 will be the same as your grade for 6.111. Your grade for 6.111 is not influenced by registration for 6.905.

Our motivation for enabling the availability of these extra units is two-fold. Foremost is our desire to convince 6.111 students that they need not do a project which is bigger and more complicated than ever done in the past. Secondly, recognizing that many students will continue to do ambitious projects, we would like to credit 6.111 students with units appropriate to work expended.

Procedures for registering for the extra units by DROP date will be announced later on in the term.

Both the determination of grades and the project time requirements are inherently subjective. The last Lab provides some guidance to the evaluation of project size and complexity. Lab 3 can require almost a full kit's worth of components. A reasonable guideline as to size of 6.111 projects is that it not require more than a kit and a proto board per person.

6.111 student projects often become too large because of a desire to effect computations in parallel and at high speed. Data paths are often unnecessarily wide and redundant. It is generally far better to minimize the type and extent of the data paths even though this results in more complicated control circuitry.

Use of microprogrammed sequencers and FSMs implemented with PALs and CPLD's allows implementation of complicated control with a small number of ICs. Please remember that massive data paths that enable computation at speeds far faster than needed do not represent a good design! It is almost always better to spend more time thinking and less time wiring. Printed January 14, 2002