Boise State University Digital Systems Laboratory Electrical and Computer Engineering Department EE230L Page 1 of 3 Spring 2005 Lab 0: Introduction to Digital Systems Laboratory 1.0 Introduction This lab is intended to help you get familiar with the laboratory facilities. It lays the foundation for all future laboratory experiments. You will work with the proto-board, logic components (Transistor-Transistor Logic (TTL) and non-TTL components) and Computer-Aided Design (CAD) software. 1.1 Rules in the Laboratory • Surfing the Internet is NOT allowed! You can, however, use the Internet as a research tool. Just ask yourself this question, “Will I be able to do this on a test without Google?” • Clean up after yourself. • Turn-off all equipment. • If you know certain things that you do are going to “blow up” or “burn up” something, we ask you not to do it! • The equipment in the laboratory has been acquired for your use; you have the responsibility to protect them. You are NOT to give out any combinations provided to you. • Any other rules not spelled out will be treated using common sense. Check with the laboratory assistant or course instructor. 1.2 Items to be Submitted • Prelab: None • Report: Team report required Presenting your results in a clear and concise manner is also very important. There will not be any formal time given to presentation of your results, but you should think about how you record your results so that the lab grader can better assess your understanding of what you have done. If your results are not clear, then your grade may not be either. 2.0 Introduction to Laboratory Equipment 2.1 Proto-board PB-503 Objective: Become familiar with the proto-board PB-503 and how to construct and test digital logic circuits. [Note: When you are getting confused and frustrated, this is when the learning process begins. So, don’t give up. Keep going and ask questions!] Being resourceful is a skill that a good engineer needs to develop. In real life you are not always given all of the information that you need to solve a problem. So when a professional says he/she is going to the lab, it means they don’t have everything they need to solve the problem. The lab is meant for discovery. So, we are going start with just the basic information and let you discover the rest. Proto-board PB-503 and the schematic layout of the board are shown in Figures 1 and 2. You have also been given a number of components (or chips). For this exercise, let’s only use the AND-gate (74xx08) component. With these resources, install the chip at the optimum (need to figure-out where this is!) location, wire the necessary connections (to ground and Vcc), and switches to test the component. WAIT for the lab assistant to check your circuit before you power-up the proto-board! Your discovery on this is to be described in your report.Boise State University Digital Systems Laboratory Electrical and Computer Engineering Department EE230L Page 2 of 3 Spring 2005 Figure 1: PB-503 Proto-board. Figure 2: A schematic layout of PB-503.Boise State University Digital Systems Laboratory Electrical and Computer Engineering Department EE230L Page 3 of 3 Spring 2005 Things to consider when working on your lab: • Is what I am about to do going to destroy anything? • Make a rough outline of your thought processes as you work through the problem, such as: o What do I wish to accomplish? o What information do I already have? o Do I need to collect more information? o Or do I just need to sit and think about it a little more? o Is it time to go ask for a hint on how to proceed? Before asking the lab instructor for help, list the things that you have tried and what the results were. If you and your lab partners are all stumped, then it is probably time to ask for help. [You might ask why? Research has shown that this way you will learn more and information acquired tends to stay in your thinking mechanism (your brain) a bit longer!] Notes: The document that describes the pin-outs and electrical properties of a chip is called data sheet. Try to minimize printing of TTL chip data sheets. You might consider creating your own document summary for the various chips that we will be using in the lab. Images for the basic chips can be found on the class web site. These images have been created at BSU, and have no restrictions on usage. 2.2 Truth Tables and Logic Gates Objective: In this experiment, you will investigate the logic behavior of various logic gates. Component: 74LS00, 74LS02, 74LS04, 74LS08, 74LS32, 74LS86 Task: Use one gate from each IC listed above to obtain the truth table of the gate. The truth table is obtained by connecting the inputs of the gate to switches and the output to an indicator lamp. Draw the logic symbol of each gate and record your results in a table. Compare them with the truth tables listed in your textbook. Remember to connect the Vcc and GND pins for each IC. Record all results in table format in your report. 2.3 Introduction Xilinx ISE CAD Software Objective: In this tutorial, you will learn how to enter and simulate a logic circuit using Xilinx ISE CAD software. Learning new software may not be much fun, but when you start playing with high-tech toys that becomes part of the game. Since this CAD software is vital to facilitate the learning process, you are being provided with a tutorial to quickly get you up to speed. It is then your responsibility to expand your knowledge of the software, and share your discoveries with others. When you have completed the tutorial, use the printed schematic from the tutorial and implement the circuit on your proto-board. When you have completed building the circuit, create a truth table that represents the circuit and see if this matches the waveform generated in the tutorial. Start the tutorial from the following link, http://coen.boisestate.edu/smloo/ee230spring2005/labs.htm Collect your results into a lab report. Important items to include are schematic, truth table, simulation waveform and any important notes about what you