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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Paste a copy of the pre-lab portion of the Lab Writeup Checklist into your hand-in materials. Pin 2 provides D0 to bus, Pin 5 provides D1, etc. The term counter limit refers to the maximum value the counter runs to e. This includes performing operations shift, add, subtract, clear on registers and memory locations and copying values from one location to another.

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Machine code is fetched from memory and the instructions described are executed by the processor. It is easy to make small mistakes when you are in a hurry. 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.

For branch instructions, insert labels at the appropriate locations and use the label values in your disassembled assembly code. Limit your answer to 40 words. The point of 7l4s374 exercise is to actually follow all the steps on the checklist, not just say you followed them. It is OK to use CodeWarrior datashret check your work and make corrections after you have done it by hand. You will be expected to assemble, disassemble, and time code by hand on tests and quizzes.

For the questions in part B. For this lab, you will adapt the string hash program from lab 1. Assume that dataseet setup, hold, pulse duration, and propagation times are valid and the outputs have settled for these sample points. Look carefully at the data sheet!


Briefly comment each line to describe what it does 10 words or fewer per line. Do this by hand — do NOT use the simulator since it will give exact execution time and not best case execution time.

Your program shall meet the following requirements: Put a brief comment at the beginning which describes the overall function of the code. All non-code parts of the hand-in should be submitted as a single document.

Think of how embarrassed you will be if you get something wrong after saying you followed the checklist. Create a similar example using different, non-trivial e. This lab uses a flip-flop to hold a data value on a bar graph LED.

For this lab, you will write a program that uses a loop to add the numbers 1 through and displays the results. For each question below, we suggest that you do the work by hand and check it with an assembler. When you record your answers, use the conventions described in the discussion section. And, as always, you must do the pre-labs independently. This lab uses the same circuit as Lab 2 part A. Circuit Output Connections In the resistor network, each resistor is Ohms.

Also, see the dataheet materials repository page.

We suggest each of the two 7ls374 in your lab group be “in charge” of one of the two parts of the lab parts to help divide the work. Assume that the output voltage is quiescent i. You MUST follow these procedures or we will not accept your submissions.

Embedded Hardware – Part B: Be sure to consult the Lab Writeup Checklist for both the prelab and lab writeup! Code files should be submitted separately, per the lab FAQ.


74LS Datasheet PDF –

Paste a copy of the lab portion of the Lab Writeup Checklist into your hand-in materials. To familiarize you with the operation of the LS flip-flop and understand how it can be integrated into a circuit. The first instruction is done as an example. Refer above for details on wiring the circuit. Please see the course web page for due dates. You do not have to use the assembly program or the simulator. Links to all files referenced in the lab and prelab can be found in the Files section at the end of this document.

Assume the voltage drop across the LED is 1. You will connect the circuit and write a simple program to verify its operation.

Scan the printed-out document after you add the checkmarks and upload to the hand-in dataxheet. Pick an instruction where the exact execution time differs from the best case execution time and explain why in one sentence. Note that 74LS labeling of “Q” outputs is in terms of bus bits and not per data sheet for dtasheet diagram.

For example, if Q7 is high, and Q6: Why is it valid or invalid? Using a checklist is your best defense against this in general, and in particular daatsheet extremely helpful for avoiding unnecessary point losses when handing in assignments for this course. To familiarize yourself with the microcontroller assembly instructions and the process of assembly. Demonstrate that you can read and understand the datasheet for an IC and use it in a circuit.

Do this by hand using the reference materials.