JNTUK R20 3-1 CAO Material/Notes PDF Download


JNTUK R20 3-1 CAO Material/Notes PDF Download

Students those who are studying JNTUK R20 ECE Branch, Can Download Unit wise R20 3-1 Computer Architecture and Organization (CAO) Material/Notes PDFs below.


JNTUK R20 3-1 CAO Material/Notes PDF Download


  • Understand the architecture of a modern computer with its various processing units. Also the Performance measurement of the computer system.
  • In addition to this the memory management system of computer.


Basic Structure Of Computers: Functional unit, Basic Operational concepts, Bus structures, System Software, Performance, The history of computer development.

Machine Instruction and Programs: Instruction and Instruction Sequencing: Register Transfer Notation, Assembly Language Notation, Basic Instruction Types

Download UNIT-1 Material PDF | Reference-2


Addressing Modes, Basic Input/output Operations, The role of Stacks and Queues in computer programming equation. Component of Instructions: Logic Instructions, shift and Rotate Instructions

Type of Instructions: Arithmetic and Logic Instructions, Branch Instructions, Addressing Modes, Input/output Operations

Download UNIT-2 Material PDF | Reference-2


INPUT/OUTPUT ORGANIZATION: Accessing I/O Devices, Interrupts: Interrupt Hardware, Enabling and Disabling Interrupts, Handling Multiple Devices, Direct Memory Access,

Buses: Synchronous Bus, Asynchronous Bus, Interface Circuits, Standard I/O Interface: Peripheral Component Interconnect (PCI) Bus, Universal Serial Bus (USB)

Download UNIT-3 Material PDF | Reference-2


The MEMORY SYSTEMS: Basic memory circuits, Memory System Consideration, Read-Only Memory: ROM, PROM, EPROM, EEPROM, Flash Memory, Cache Memories: Mapping Functions, INTERLEAVING

Secondary Storage: Magnetic Hard Disks, Optical Disks

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Processing Unit: Fundamental Concepts: Register Transfers, Performing An Arithmetic Or Logic Operation, Fetching A Word From Memory, Execution of Complete Instruction, Hardwired Control,

Micro programmed Control: Microinstructions, Micro program Sequencing, Wide Branch Addressing Microinstructions with next –Address Field

Download UNIT-5 Material PDF | Reference-2


  1. Computer Organization, Carl Hamacher, Zvonks Vranesic, Safea Zaky, 5th Edition, McGraw Hill, 2011.
  2. Computer Architecture and Organization , John P. Hayes, 3rd Edition, McGraw Hill, 2002.


1. Computer Organization and Architecture – William Stallings Sixth Edition, Pearson/PHI

2. Structured Computer Organization – Andrew S. Tanenbaum, 4th Edition PHI/Pearson, 2012.

3. Fundamentals or Computer Organization and Design, – Sivaraama Dandamudi Springer Int. Edition, 2003.

4. “Computer Organization and Design: The Hardware/Software Interface” by David A. Patterson and John L. Hennessy, 1998.

5. J .P. Hayes, “Computer Architecture and Organization”,McGraw-Hill,1998.


1. Students can understand the architecture of modern computer.

2. They can analyze the Performance of a computer using performance equation

3. Understanding of different instruction types.

4. Students can calculate the effective address of an operand by addressing modes

5. They can understand how computer stores positive and negative numbers.

6. Understand the concepts of I/O Organization and Memory systems.

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