6.3. Module Learning Strategy

So basically unit 1 and unit 2 will be basics of this module, where we will study instruction cycle and the micro operations of an unit. Basically in first unit we will be learning that what is an instruction cycle that we know fetch, decode, execute sometimes you have an interrupt and so forth and what of the micro instructions available for them. And the second one basically we will deal with timing sequence, that exactly what is the time cycles and more integrated details of the control signals will be studied over there.

In this part, we learn about the two initial units of the module. Unit 1 focuses on the instruction cycle, which consists of fetching, decoding, and executing commands, as well as how interrupts can affect this cycle. Unit 2 deals with timing sequences, providing details on how timing diagrams represent the timing and order of signals needed during instruction execution.

Consider a chef preparing a recipe. The instruction cycle is like the steps of preparing the dish: gathering ingredients (fetch), understanding the recipe (decode), and cooking the dish (execute). Timing sequences are like the cooking times for each step and ensuring everything is done in the correct order so that the meal turns out perfectly.

Unit 3 will describe the control signals I mean timing sequence required for a complete execution of a continuous instruction. In 1 or 2 will be building the basics and in third unit we will take a large code and we will take an organization like a single bus multiple bus and we will see how it goes?

Unit 3 expands on units 1 and 2 by focusing on how control signals and timing sequences interact during the complete execution of longer instructions. This unit examines how different organizational structures, such as single bus and multiple bus architectures, impact the execution process, facilitating faster or more efficient operations.

Imagine managing a team to complete a large project. In a single bus scenario, only one person can work on a specific task at any time (like a single bus transferring data). However, in a multiple bus system, several team members can work simultaneously on different tasks, completing the project more efficiently.

Instruction 4 and 5 will take different addressing modes and we will study the same things. Like we have already seen different type of instruction modes are available oh sorry different type of addressing modes are available like direct, indirect, base, displacement.

In units 4 and 5, the focus shifts to examining how different addressing modes (such as direct, indirect, base, and displacement addressing) affect instruction execution. Each addressing mode has its own method for locating operands and can influence how control signals are generated and processed.

Think of addressing modes like different ways to find a book in a library. Direct addressing is like knowing the exact shelf number where your book is located. Indirect addressing is akin to asking a librarian to look it up for you, while base and displacement modes might involve categorizing books by subject or author and navigating through sections.

Instruction 6 will describe about the hardwired control unit. So, now, in the instruction 6 we will deal with, but if you are given a set of instructions, if you want to make a hardwired control unit how to design that? Inst unit 7 will tell you about the different type of bus architecture, basically as I was telling that we will study with in depth of different type of single bus multiple bus and we will study for all of them how to design the control set instructions?

In units 6 and 7, students will learn how to design hardwired control units. This involves creating systems that respond to specific instructions using fixed configurations. Additionally, the module addresses various bus architectures, analyzing how each impacts control signal design.

Designing a hardwired control unit is similar to building a fixed assembly line in a factory, where each station has a specific task. If the factory needs to create a new product, adjusting this assembly line may be difficult. Understanding different bus architectures is like evaluating whether to use a single conveyor belt or several to move products through the assembly process.

Last 2 units will basically deal on deal with how to design micro programmed control units for different bus organizations. Basically that is what is the idea. So, initially we will start with very basic instruction set what are the micro instructions for that, then we will look at the timing sequence then we will see if for different set of instructions or different addressing modes how they change, then we will give you an idea of hardwired control based design and then we will also give you an idea for how to design a micro programmed control based unit for generating different type of signals.

The final two units concentrate on designing microprogrammed control units, which offer more flexibility than hardwired designs. Students will explore how to implement micro instructions for different bus architectures, analyze the impact of addressing modes on control signal generation, and design units that generate control signals effectively based on the programming needs.

Microprogrammed control can be compared to a dynamic team working on various projects together, with team members able to swap roles or tasks as necessary. Unlike a rigid assembly line, this adaptability allows the team to respond quickly to new instructions and shifting requirements.

So basically I am not going to read out the slide you can look at it we are describing here basically what are the, what are different units? And from which book you can study this basically we are referring William Stallings book and Hamacher’s book. So, exactly which unit which topic and which module you have to read like for example, in unit one which chapter you have to read or all the detailed down in these slides.

This section serves as a guide to recommended resources, specifically books by William Stallings and Hamacher that align with the syllabus of the module. This guidance helps students locate the necessary chapters and topics to support their learning.

Think of this section like a recommended reading list from a teacher. Just like students might need to consult a textbook to understand mathematical concepts fully, they can use the suggested books here to deepen their understanding of control units and their designs.

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