Computer architecture focuses on the design and organization of computer systems, including the structure and behavior of CPUs, memory, and input/output devices. This guide explains key concepts such as multiplexers, arithmetic micro-operations, and control functions essential for understanding how computers process data. It is suitable for students and professionals seeking to deepen their knowledge of computer systems and their functionalities. The content covers various topics, including the operation of multiplexers, the role of the Arithmetic Logic Unit (ALU), and sample programs demonstrating basic computer operations.

Key Points

  • Explains the function and characteristics of multiplexers in computer architecture.
  • Describes arithmetic micro-operations and their significance in CPU operations.
  • Details the control functions used in managing arithmetic processes.
  • Includes sample programs illustrating basic computer instructions and execution.
Ekemini Tom
188 pages
Language:English
Type:Lecture Notes
Computer Science
Ekemini Tom
188 pages
Language:English
Type:Lecture Notes
Computer Science
41
/ 188
Group 1- intro to
computer architecture
FUNCTIONAL DESCRIPTION OF
MULTIPLEXERS
WHAT IS A MULTIPLEXER?
A multiplexer (MUX) is a combinational logic circuit that selects one of
several input signals and forwards it to a single output line.
ANALOGY
Think of a railway switch or TV selector - multiple input
tracks/ channels, but only one reaches the output at any given
time.
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End of Document
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Figures

Introduction to Computer Architecture — SELECT LOGIC:
Introduction to Computer Architecture — TRUTH TABLE
GENERAL FORMULA: n select lines ʻN
Introduction to Computer Architecture — COMMON MULTIPLEXER TYPES
Introduction to Computer Architecture — COMMON MULTIPLEXER TYPES
Introduction to Computer Architecture — COMMON MULTIPLEXER TYPES
Introduction to Computer Architecture — IMPLEMENTATION USING GATES (2:1 MUX)
Introduction to Computer Architecture — Control Unit (CU):
Introduction to Computer Architecture — Memory Unit
Devices that display or produce the processed results from the computer (e.g.,
Introduction to Computer Architecture — 3. Input Unit
Introduction to Computer Architecture — System Bus
Introduction to Computer Architecture — 📐 Key Architectural Types
Introduction to Computer Architecture — Microarchitecture (or Computer Organization):
Introduction to Computer Architecture — System Design:
Introduction to Computer Architecture — Figure 16
DECODERS AND BINARY COUNTERS DIGITAL SYSTEMS
DECODERS AND BINARY COUNTERS DIGITAL SYSTEMS
The Enable pin feature controls when the decoder operates.
Introduction to Computer Architecture — BINARY COUNTERS,
Introduction to Computer Architecture — Classi
Introduction to Computer Architecture — Type
Introduction to Computer Architecture — Type
Introduction to Computer Architecture — Type
Introduction to Computer Architecture — RAM (Random Access Memory)
Introduction to Computer Architecture — ROM (Read Only Memory)
Introduction to Computer Architecture — INTRODUCTION TO REGISTER TRANSFER IN COMPUTER ORGANIZATION AND
We need the transfer to appear only under a fixed control condition. This can be displayed using
As displayed in the timing diagram, P is activated in the control area by the increasing edge of a
Introduction to Computer Architecture — CPU-Memory Interaction
Introduction to Computer Architecture — Types of Memory Transfer
In the above diagram initially, MDR can contain any garbage value and
Introduction to Computer Architecture — Figure 33
Introduction to Computer Architecture — Figure 34
Introduction to Computer Architecture — Figure 35
Introduction to Computer Architecture — CLOCK CYCLES AND FINITE STATE MACHINES
Introduction to Computer Architecture — COMPONENTS INVOLVED
Introduction to Computer Architecture — COMPONENTS INVOLVED
Introduction to Computer Architecture — COMPONENTS INVOLVED
Introduction to Computer Architecture — COMPONENTS INVOLVED
Introduction to Computer Architecture — COMPONENTS INVOLVED
Introduction to Computer Architecture — COMPONENTS INVOLVED
Introduction to Computer Architecture — STEPS IN THE I/O INTERRUPT CYCLE
Introduction to Computer Architecture — INTERUPT SERVICE ROUTINE
Introduction to Computer Architecture — WORKING OF ASSEMBLER
Introduction to Computer Architecture — Pass-2
his acts as the computer's short-term

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FAQs

What is a multiplexer and how does it work?
A multiplexer, or mux, is a combinational logic circuit that selects one of several input signals and forwards it to a single output line. It operates by using select lines to determine which input is connected to the output. For example, in a 4:1 multiplexer, two select lines (s1, s0) can connect one of four inputs (i0, i1, i2, i3) to the output based on the binary value represented by the select lines.
What are the key characteristics of a multiplexer?
The key characteristics of a multiplexer include having 2^n input lines, 1 output line, and n select lines. The select lines control which input is connected to the output. For instance, a 4:1 multiplexer has 4 input lines and 2 select lines, which can be used to select one of the inputs to be sent to the output.
What are common applications of multiplexers?
Multiplexers have several important applications, including data routing between multiple data sources, parallel-to-serial conversion for transmitting multiple bits over a single line, and implementing any Boolean function. They are also used in communication systems for time-division multiplexing, in computer memory for address selection in RAM, and in ALU operations to select between different operations.
What is the von Neumann architecture?
The von Neumann architecture is a classic model for computer architecture that outlines five main functional components: the Central Processing Unit (CPU), memory unit, input unit, output unit, and system bus. This architecture describes how these components are interconnected and interact to execute instructions from software.
What are the differences between von Neumann and Harvard architecture?
The von Neumann architecture features a unified memory structure that stores both instructions and data in the same memory unit, while the Harvard architecture has separate memory blocks for instructions and data. Von Neumann uses a shared bus for transferring data and instructions, which can lead to slower execution, whereas Harvard architecture supports pipelining, allowing simultaneous access to program and data memory, resulting in higher efficiency.
What are the core components of a CPU in the von Neumann model?
The CPU in the von Neumann model consists of three main parts: the Arithmetic Logic Unit (ALU), which performs arithmetic and logical operations; the Control Unit (CU), which directs and coordinates operations within the computer; and registers, which are small, high-speed storage locations used to temporarily hold data and instructions needed for current operations.
What is the function of a shift register?
A shift register is a cascade of flip-flops used to store and transfer digital data sequentially. Its core function is to store data and shift it one position to the left or right upon receiving a clock pulse. Shift registers can be classified based on how data is input and output, with applications including data conversion and temporary storage.

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