Digital Fundamentals (11th Edition)
11th Edition
ISBN: 9780132737968
Author: Thomas L. Floyd
Publisher: PEARSON
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Textbook Question
Chapter 1, Problem 21P
Consider a register that can store eight bits. Assume that it has been reset so that it contains zeros in all positions. If you transfer four alternating bits (0101) serially into the register, beginning with a 1 and shifting to the right, what will the total content of the register be as soon as the fourth bit is stored?
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Create a circuit using Logism that implements a memory register capable of storing a 4-bit binary number. You should investigate the different circuits that can be used to store a bit of memory and then utilize the one that meets the following requirements.
Your register circuit must be able to support the inputs detailed in the ATTACHED diagram.
Each bit of the register circuit must support a data in, a data out, and a control. The control functions such that the data value will only be changed when the control bit is toggled on.
The value in the register must be persistent and can only be changed when the control bit has been toggled.
You should develop and test the 4-bit register using logism.
When you have successfully developed a functioning 4-bit register, you should duplicate the circuit and add it to the two inputs of the ALU circuit that you developed in the previous unit.
Complete and test all of your circuits using Logism.
A set of ten packed BCD numbers is stored in the memory location starting at 3050H.
i. Write a program with a subroutine to add these numbers in BCD. If a carry is
generated, save it in register B, and adjust it for BCD. The final sum will be less
than 9999sCD.
ii. Write a second subroutine to unpack the BCD sum stored in registers A and B,
and store them in the memory locations starting at 3070H. The most significant
digit (BCD4) should be stored at 3070H and the least significant digit (BCD)
at 3073H.
Create a circuit using Logism that implements a memory register capable of storing a 4-bit binary number. You should investigate the different circuits that can be used to store a bit of memory and then utilize the one that meets the following requirements.
Your register circuit must be able to support the inputs detailed in the following diagram: CHECK ATTACHMENT PLEASE
Each bit of the register circuit must support a data in, a data out, and a control. The control functions such that the data value will only be changed when the control bit is toggled on.
The value in the register must be persistent and can only be changed when the control bit has been toggled.
Develop and test the 4 bit register using logism.
When you have successfully developed a functioning 4 bit register, you should duplicate the circuit and add it to the two inputs of the ALU circuit that I ATTACHED.(png format ) You can covert to .circ file to work with.
Chapter 1 Solutions
Digital Fundamentals (11th Edition)
Ch. 1.1 - Prob. 1CUCh. 1.1 - Prob. 2CUCh. 1.1 - Prob. 3CUCh. 1.1 - Prob. 4CUCh. 1.1 - Prob. 5CUCh. 1.2 - Prob. 1CUCh. 1.2 - What does bit mean?Ch. 1.2 - What are the bits in a binary system?Ch. 1.2 - Prob. 4CUCh. 1.2 - Prob. 5CU
Ch. 1.2 - Prob. 6CUCh. 1.2 - What is the purpose of a timing diagram?Ch. 1.2 - What is the main advantage of parallel transfer...Ch. 1.3 - When does the NOT function produce a HIGH output?Ch. 1.3 - When does the AND function produce a HIGH output?Ch. 1.3 - Prob. 3CUCh. 1.3 - Prob. 4CUCh. 1.3 - What is a logic gate?Ch. 1.4 - What does a comparator do?Ch. 1.4 - What are the four basic arithmetic operations?Ch. 1.4 - Prob. 3CUCh. 1.4 - Prob. 4CUCh. 1.4 - Prob. 5CUCh. 1.4 - Prob. 6CUCh. 1.4 - What does a counter do?Ch. 1.5 - List three major categories of programmable logic...Ch. 1.5 - Prob. 2CUCh. 1.5 - Name the steps in the programming process.Ch. 1.5 - Prob. 4CUCh. 1.5 - Prob. 5CUCh. 1.6 - What is an integrated circuit?Ch. 1.6 - Prob. 2CUCh. 1.6 - Generally, in what classification does a...Ch. 1.7 - What is the basic function of an oscilloscope?Ch. 1.7 - Name two main differences between an oscilloscope...Ch. 1.7 - What does the volts/div control on an oscilloscope...Ch. 1.7 - What does the sec/div control on an oscilloscope...Ch. 1.7 - Prob. 5CUCh. 1.7 - Prob. 6CUCh. 1.8 - Prob. 1CUCh. 1.8 - Prob. 2CUCh. 1.8 - Prob. 3CUCh. 1.8 - Prob. 4CUCh. 1 - An analog quantity is one having continuous valuesCh. 1 - Prob. 2TFQCh. 1 - Prob. 3TFQCh. 1 - Prob. 4TFQCh. 1 - In positive logic, a LOW level represents a binary...Ch. 1 - If the period of a pulse waveform increases, the...Ch. 1 - Prob. 7TFQCh. 1 - The basic logic operations are AND, OR, and MAYBE.Ch. 1 - If the input to an inverter is a 1, the output is...Ch. 1 - Two broad types of digital integrated circuits are...Ch. 1 - Prob. 1STCh. 1 - Prob. 2STCh. 1 - Prob. 3STCh. 1 - Prob. 4STCh. 1 - Prob. 5STCh. 1 - An inverter performs the NOT operation changes a...Ch. 1 - The output of an AND gate is HIGH when any input...Ch. 1 - The output of an OR gate is HIGH when any input is...Ch. 1 - The device used to convert a binary number to a...Ch. 1 - An example of a data storage device is the logic...Ch. 1 - VHDL is a logic device PLD programming language...Ch. 1 - A CPLD is a controlled program logic device...Ch. 1 - An FPGA is a field-programmable gate array fast...Ch. 1 - A fixed-function IC package containing four AND...Ch. 1 - An LSI device has a circuit complexity of from 10...Ch. 1 - Prob. 1PCh. 1 - Prob. 2PCh. 1 - List three common products that can have either a...Ch. 1 - Explain the difference between positive and...Ch. 1 - Prob. 5PCh. 1 - List the sequence of levels (HIGH and LOW) that...Ch. 1 - Prob. 7PCh. 1 - Prob. 8PCh. 1 - Prob. 9PCh. 1 - Prob. 10PCh. 1 - Determine the duty cycle of the waveform in Figure...Ch. 1 - Prob. 12PCh. 1 - What is the total serial transfer time for the...Ch. 1 - What is the period if the clock frequency is 3.5...Ch. 1 - Form a single logical statement from the following...Ch. 1 - A logic circuit requires HIGHs on all its inputs...Ch. 1 - A basic 2-input logic circuit has a HIGH on one...Ch. 1 - A basic 2-input logic circuit has a HIGH on one...Ch. 1 - Name the logic function of each block in Figure...Ch. 1 - A pulse waveform with a frequency of 10 kHz is...Ch. 1 - Consider a register that can store eight bits....Ch. 1 - Which of the following acronyms do not describe a...Ch. 1 - What do each of the following stand for? SPLD CPLD...Ch. 1 - Prob. 24PCh. 1 - Prob. 25PCh. 1 - A fixed-function digital 1C chip has a complexity...Ch. 1 - Prob. 27PCh. 1 - Label the pin numbers on the packages in Figure...Ch. 1 - A pulse is displayed on the screen of an...Ch. 1 - A waveform is measured on the oscilloscope and its...Ch. 1 - The period of a pulse waveform measures four...Ch. 1 - Prob. 32PCh. 1 - Prob. 33PCh. 1 - Prob. 34PCh. 1 - Explain the signal-tracing method of...Ch. 1 - Prob. 36PCh. 1 - Prob. 37PCh. 1 - Prob. 38PCh. 1 - If the symptom of a particular system is an...Ch. 1 - Prob. 40PCh. 1 - Prob. 41PCh. 1 - Prob. 42PCh. 1 - Assume that you have isolated the problem down to...
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