Part, 74LS Category. Description, Octal D-type Transparent Latches AND Edge-triggered Flip-flops. Company, Texas Instruments, Inc. Datasheet, Download. 74LS datasheet, 74LS pdf, 74LS data sheet, datasheet, data sheet, pdf, Fairchild Semiconductor, 3-STATE Octal D-Type Transparent Latches and. Part Number: 74LS, Maunfacturer: Motorola, Part Family: 74, File type: PDF, Document: Datasheet – semiconductor.

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And, as always, you must do the pre-labs independently. The term counter limit refers to the maximum value the counter runs to e.

74LS Datasheet Fairchild Semiconductor pdf data sheet FREE from

Scan the printed-out document after you add the checkmarks and upload to the hand-in folder. Also, see the course materials repository page. Links to all files referenced in the lab and prelab can be found in the Files section at the end of this document.

Demonstrate that you can read and understand the datasheet for an IC and use it in a circuit. It is OK to use CodeWarrior to check your work and make corrections after you have done it by hand.


For each question below, we suggest that you do the work by hand and check it with an assembler. Refer above for details on wiring the circuit. Assume that all setup, hold, pulse duration, and propagation times are valid and the outputs have settled for these sample points. Circuit Output Connections In the datasheet network, each resistor is Ohms.


18-348 Lab #2

Assume the voltage drop across the LED is 1. Be sure to consult the Lab Writeup Checklist for both the prelab and lab writeup! This lab uses the same circuit as Lab 2 part A. Limit your answer to 40 words. Assume that the output voltage is quiescent i. Using a checklist is your best defense against this in general, and in particular is extremely helpful for avoiding unnecessary point losses when handing in assignments for this course.

For example, if Q7 is high, and Q6: Embedded Hardware – Part B: You do not have to use the assembly program or the simulator. Create a similar example using different, non-trivial e. Pin 2 provides D0 to bus, Pin 5 provides D1, etc.

Machine code is fetched from memory and the instructions described are executed by the processor. Confirm the operation using the simulator to make sure you got it right, which you need document only by saying “checked with simulator” in your hand-in. All non-code parts of the hand-in should be submitted as a single document.

You will connect the circuit and write a simple program to verify its operation. Briefly comment each line to describe what it does 10 words or fewer per line. Your program shall meet the following requirements: We suggest each of the two students in your lab group be “in charge” of one of the two parts of the lab parts to help divide the work.

Pick an instruction where the exact execution time differs from the best case execution time and explain why in one sentence. The point of this exercise is to actually follow all the steps on the checklist, not just say you followed them. For this lab, you will adapt the string hash program from lab 1. This lab uses a flip-flop to hold a data value on a bar graph LED. Why is it valid or invalid?


Do this by hand — do NOT use the simulator since it will give exact execution time and dztasheet best case execution time. The first instruction is done as an example.

74LS datasheet, Pinout ,application circuits DUAL 4-INPUT POSITIVE-NAND OHM LINE DRIVERS

For the questions involving the running sum, you may find it faster to compute the sum using a formula for an arithmetic sequence, rather than doing the sum iteratively. BUT, we expect both of you to understand and participate in the execution of both labs.

For the questions in part B. Do this by hand using the dtaasheet materials. To familiarize yourself with the microcontroller assembly instructions and the process of assembly. Put a brief comment at the beginning which describes the overall function of the code. Paste a copy of the pre-lab portion of the Lab Writeup Checklist into your hand-in materials.

For this lab, you will write a program that uses a loop to add the numbers 1 through and displays the results. When you record your answers, use the conventions described in the discussion section.

You MUST follow these procedures or we will dataheet accept your submissions.