29. Three Bus Architecture
The chapter explains the architecture and organization of a CPU's internal bus system, comparing single, two, and three bus architectures. It highlights the importance of these architectures in enhancing the efficiency of CPU operations and the role of various components, including the ALU, registers, and control signals. The focus is on how the internal bus configuration affects data processing, instruction execution, and overall system performance.
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What we have learnt
- Different CPU bus architectures significantly influence data performance and instruction execution efficiency.
- The three bus architecture allows simultaneous data handling, reducing the need for temporary registers compared to single bus systems.
- Understanding the roles of internal components like ALU, memory data registers, and instruction registers is essential for analyzing CPU architectures.
Key Concepts
- -- Single Bus Architecture
- A configuration where only one bus is used for data transfer, which can result in longer execution time due to the need for temporary registers.
- -- Three Bus Architecture
- An advanced configuration that utilizes three distinct buses, allowing for simultaneous data transfer, enhancing efficiency by minimizing the need for temporary storage.
- -- ALU (Arithmetic Logic Unit)
- A fundamental component of the CPU that performs arithmetic and logical operations, with its functioning being significantly influenced by the bus architecture.
- -- Memory Data Register
- A register that serves as a temporary storage location for data that is being read from or written to memory, now enhanced in a three bus system to support multiple outputs.
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