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LS374 DATASHEET PDF

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You do not have to use the assembly program or the simulator. This includes performing operations shift, add, subtract, clear on registers and memory locations and copying values from one location to another.

For this lab, you will write a program that uses a loop to os374 the numbers 1 through and displays the results. Also, see the course materials repository page.

Note that 74LS labeling of “Q” outputs is in terms of bus bits and not per data sheet for this diagram. Put a brief comment at the beginning which describes the overall function of the code. Machine code is fetched from memory and the instructions described are executed by the processor. Create a similar example using different, non-trivial e. Please see the course web page for due dates. It is OK to use CodeWarrior to check your work datasyeet make corrections after you have done it by hand.

18-348 Lab #2

Assume that the output voltage is quiescent i. BUT, we expect both of datasheey to understand and participate in the execution of both labs. For each question below, we suggest that you do the work by hand and check it with an assembler.

You will connect the circuit and write a simple program to verify its operation. To familiarize yourself with the microcontroller assembly instructions and the process of assembly. Circuit Output Connections In the resistor network, each resistor is Ohms.

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It is easy to make small mistakes when you are in a hurry. Think of how embarrassed you will be if you get something wrong after saying you followed the checklist. 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.

Refer above for details on wiring the circuit. 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. Embedded Hardware – Part B: Pin 2 provides D0 to bus, Pin 5 provides D1, etc. Look carefully at the data sheet! All non-code parts of the hand-in should be submitted as a single document. Briefly comment each line to describe what it does 10 words or fewer per line. For this lab, you will adapt the string hash program from lab 1.

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 the questions in part B. The point of this exercise is to actually follow all the steps on the checklist, not just say you followed them. Scan the printed-out document after you add the checkmarks and upload to the hand-in folder.

Code files should be submitted separately, per the lab FAQ. Demonstrate that you can read and understand the datasheet for an IC and use it in a circuit. Be sure to consult the Lab Writeup Checklist for both the prelab and lab writeup! The term counter limit refers to the maximum value the counter runs to e. This lab uses the same circuit as Lab 2 part A.

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Paste a copy of the lab portion of the Lab Writeup Checklist into your hand-in materials. When you record your answers, use the conventions described in the discussion section. The first instruction is done as an example. Do this by hand — do NOT use the simulator since it will give exact execution time and not best case execution time. Assume the voltage drop across the LED is 1.

LS 데이터시트(PDF) – TI store

And, as always, you must do the pre-labs independently. Do this by hand using the reference materials. Pick an instruction where the exact execution time differs from the dahasheet case execution time and explain why in one sentence.

This lab uses a flip-flop to hold a data value on a bar graph LED. For branch instructions, insert labels at the appropriate locations and use the label values in your disassembled assembly code. Datsaheet is it valid or invalid?

Assume that all setup, hold, pulse duration, and propagation times are valid and the outputs have settled for these sample points. Paste a copy of the pre-lab portion of the Lab Writeup Checklist into your datadheet materials. You will be expected to assemble, disassemble, and time code by hand on tests and quizzes. You MUST follow these procedures or we will not accept your submissions. To familiarize you with the operation of the LS flip-flop and understand how it can be integrated into a circuit.

Limit your answer to 40 words.

For example, if Q7 is high, and Q6: Your program shall meet the following requirements: