6. Control Unit
The chapter explores the intricacies of the control unit in computer organization, focusing on the execution of instructions through instruction cycles and micro-operations. It addresses the generation of control signals and their impact on the effective execution of code within various architectures, such as single, double, and triple bus systems. The text delves into both hardwired and micro-programmed controls, providing insights into their design and implementation to optimize computing operations.
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Sections
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What we have learnt
- Understanding the role of control signals in executing instructions.
- Differences between hardwired and micro-programmed control units.
- The impact of bus architecture on instruction execution speed.
Key Concepts
- -- Instruction Cycle
- The sequence of operations that a CPU performs to execute an instruction, typically including fetching, decoding, and executing the instruction.
- -- Control Signals
- Signals generated to control the operations of different components in a computer system during instruction execution.
- -- Micro Operations
- The basic operations involved in executing macro instructions, including data movement and transformations at the micro level.
- -- Hardwired Control
- A type of control unit design where the control signals are generated by fixed logic circuits.
- -- MicroProgrammed Control
- A control unit design that uses a set of instructions (micro instructions) stored in memory to generate control signals dynamically.
- -- Bus Architecture
- Refers to the configuration of data buses in a computer system that determines how data is communicated between components.
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